Shunz Posted December 20, 2014 Share Posted December 20, 2014 My 2nd Red 6TB drive seems to have a significantly slower zeroing timing than the first one I bought several months ago. (unraid 5.0.5) 1st WD Red 6TB (updated info) precleared while on vacation, therefore, no other apps (e.g. Plex) running == WDCWD60EFRX-68MYMN1 == Ran 3 cycles == Using :Read block size = 8388608 Bytes == Last Cycle's Pre Read Time : 13:21:05 (124 MB/s) == Last Cycle's Zeroing time : 12:07:27 (137 MB/s) == Last Cycle's Post Read Time : 26:19:26 (63 MB/s) == Last Cycle's Total Time : 38:27:52 == Total Elapsed Time 128:41:48 == Disk Start Temperature: 33C == Current Disk Temperature: 37C, 2nd WD Red 6TB - zeroing seems much slower == WDCWD60EFRX-68MYMN1 == Ran 3 cycles == Using :Read block size = 8388608 Bytes == Last Cycle's Pre Read Time : 13:42:57 (121 MB/s) == Last Cycle's Zeroing time : 17:15:43 (96 MB/s) == Last Cycle's Post Read Time : 27:40:40 (60 MB/s) == Last Cycle's Total Time : 44:57:22 == Total Elapsed Time 146:30:34 == Disk Start Temperature: 37C == Current Disk Temperature: 38C, Update: 3rd WD Red 6TB - seems consistent with the 2nd preclear, though even slower == invoked as: ./preclear_disk.sh -A -c 3 /dev/sdc == WDCWD60EFRX-68MYMN1 WD-WX21D947NSHF == Ran 3 cycles == Using :Read block size = 8388608 Bytes == Last Cycle's Pre Read Time : 13:31:58 (123 MB/s) == Last Cycle's Zeroing time : 16:16:42 (102 MB/s) == Last Cycle's Post Read Time : 26:38:58 (62 MB/s) == Last Cycle's Total Time : 42:56:39 == Total Elapsed Time 159:15:54 == Disk Start Temperature: 31C == Current Disk Temperature: 35C, Helium 6TB for comparison == HGSTHUS726060ALA640 == Ran 3 cycles == Using :Read block size = 8388608 Bytes == Last Cycle's Pre Read Time : 11:59:36 (138 MB/s) == Last Cycle's Zeroing time : 11:40:15 (142 MB/s) == Last Cycle's Post Read Time : 23:40:32 (70 MB/s) == Last Cycle's Total Time : 35:21:46 == Total Elapsed Time 118:03:47 == Disk Start Temperature: 31C == Current Disk Temperature: 38C, Are such variances typical? (e.g. CPU loads, etc) What's worrying is that a 3rd Red 6TB that I am pre-clearing right now, seems to have an even worse zeroing time (Pre-read + 75% zeroing @ 36 hours elapsed). Despite buying this 3rd drive 3 weeks after the previous one, it still has the same 20th October 2014 manufacturing date. Some other observations: - I've played around using different SATA ports. The preclear was completed on the board's SATA port. - Pre-clearing on the LSI SAS controller stalled once, and another time zeroing slowed down to about 24MB/s. LSI controller had no problems with my existing drives. - Multiple HD Tune benchmark showed no read/write speed anomalies. Starts at about 170+MB/s and steadily drops to about 70MB/s at the end of the drive. Is this a problem? Or am I just looking too much at these pre-clear timings? Full preclear results text in the next post. Thanks!!! Quote Link to comment
Shunz Posted December 20, 2014 Author Share Posted December 20, 2014 The slower zeroing 6TB in question: ========================================================================1.15 == invoked as: ./preclear_disk.sh -A -c 3 /dev/sdc == WDCWD60EFRX-68MYMN1 == Disk /dev/sdc has been successfully precleared == with a starting sector of 1 == Ran 3 cycles == == Using :Read block size = 8388608 Bytes == Last Cycle's Pre Read Time : 13:42:57 (121 MB/s) == Last Cycle's Zeroing time : 17:15:43 (96 MB/s) == Last Cycle's Post Read Time : 27:40:40 (60 MB/s) == Last Cycle's Total Time : 44:57:22 == == Total Elapsed Time 146:30:34 == == Disk Start Temperature: 37C == == Current Disk Temperature: 38C, == ============================================================================ ** Changed attributes in files: /tmp/smart_start_sdc /tmp/smart_finish_sdc ATTRIBUTE NEW_VAL OLD_VAL FAILURE_THRESHOLD STATUS RAW_VALUE Seek_Error_Rate = 100 200 0 ok 0 Temperature_Celsius = 114 115 0 ok 38 No SMART attributes are FAILING_NOW 0 sectors were pending re-allocation before the start of the preclear. 0 sectors were pending re-allocation after pre-read in cycle 1 of 3. 0 sectors were pending re-allocation after zero of disk in cycle 1 of 3. 0 sectors were pending re-allocation after post-read in cycle 1 of 3. 0 sectors were pending re-allocation after zero of disk in cycle 2 of 3. 0 sectors were pending re-allocation after post-read in cycle 2 of 3. 0 sectors were pending re-allocation after zero of disk in cycle 3 of 3. 0 sectors are pending re-allocation at the end of the preclear, the number of sectors pending re-allocation did not change. 0 sectors had been re-allocated before the start of the preclear. 0 sectors are re-allocated at the end of the preclear, the number of sectors re-allocated did not change. ============================================================================ ============================================================================ == == S.M.A.R.T Initial Report for /dev/sdc == Disk: /dev/sdc smartctl 6.2 2013-07-26 r3841 [i686-linux-3.9.11p-unRAID] (local build) Copyright © 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Device Model: WDC WD60EFRX-68MYMN1 LU WWN Device Id: 5 0014ee 2b5d1d0ab Firmware Version: 82.00A82 User Capacity: 6,001,175,126,016 bytes [6.00 TB] Sector Sizes: 512 bytes logical, 4096 bytes physical Rotation Rate: 5700 rpm Device is: Not in smartctl database [for details use: -P showall] ATA Version is: ACS-2, ACS-3 T13/2161-D revision 3b SATA Version is: SATA 3.1, 6.0 Gb/s (current: 3.0 Gb/s) Local Time is: Sun Dec 7 23:32:50 2014 SGT SMART support is: Available - device has SMART capability. SMART support is: Enabled === START OF READ SMART DATA SECTION === SMART overall-health self-assessment test result: PASSED General SMART Values: Offline data collection status: (0x00) Offline data collection activity was never started. Auto Offline Data Collection: Disabled. Self-test execution status: ( 0) The previous self-test routine completed without error or no self-test has ever been run. Total time to complete Offline data collection: ( 5564) seconds. Offline data collection capabilities: (0x7b) SMART execute Offline immediate. Auto Offline data collection on/off support. Suspend Offline collection upon new command. Offline surface scan supported. Self-test supported. Conveyance Self-test supported. Selective Self-test supported. SMART capabilities: (0x0003) Saves SMART data before entering power-saving mode. Supports SMART auto save timer. Error logging capability: (0x01) Error logging supported. General Purpose Logging supported. Short self-test routine recommended polling time: ( 2) minutes. Extended self-test routine recommended polling time: ( 709) minutes. Conveyance self-test routine recommended polling time: ( 5) minutes. SCT capabilities: (0x303d) SCT Status supported. SCT Error Recovery Control supported. SCT Feature Control supported. SCT Data Table supported. SMART Attributes Data Structure revision number: 16 Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x002f 200 200 051 Pre-fail Always - 0 3 Spin_Up_Time 0x0027 204 204 021 Pre-fail Always - 8800 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 10 5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0 7 Seek_Error_Rate 0x002e 200 200 000 Old_age Always - 0 9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 141 10 Spin_Retry_Count 0x0032 100 253 000 Old_age Always - 0 11 Calibration_Retry_Count 0x0032 100 253 000 Old_age Always - 0 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 10 192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 6 193 Load_Cycle_Count 0x0032 200 200 000 Old_age Always - 18 194 Temperature_Celsius 0x0022 115 111 000 Old_age Always - 37 196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0 197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0030 100 253 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0 200 Multi_Zone_Error_Rate 0x0008 100 253 000 Old_age Offline - 0 SMART Error Log Version: 1 No Errors Logged SMART Self-test log structure revision number 1 No self-tests have been logged. [To run self-tests, use: smartctl -t] SMART Selective self-test log data structure revision number 1 SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS 1 0 0 Not_testing 2 0 0 Not_testing 3 0 0 Not_testing 4 0 0 Not_testing 5 0 0 Not_testing Selective self-test flags (0x0): After scanning selected spans, do NOT read-scan remainder of disk. If Selective self-test is pending on power-up, resume after 0 minute delay. == ============================================================================ ============================================================================ == == S.M.A.R.T Final Report for /dev/sdc == Disk: /dev/sdc smartctl 6.2 2013-07-26 r3841 [i686-linux-3.9.11p-unRAID] (local build) Copyright © 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Device Model: WDC WD60EFRX-68MYMN1 LU WWN Device Id: 5 0014ee 2b5d1d0ab Firmware Version: 82.00A82 User Capacity: 6,001,175,126,016 bytes [6.00 TB] Sector Sizes: 512 bytes logical, 4096 bytes physical Rotation Rate: 5700 rpm Device is: Not in smartctl database [for details use: -P showall] ATA Version is: ACS-2, ACS-3 T13/2161-D revision 3b SATA Version is: SATA 3.1, 6.0 Gb/s (current: 3.0 Gb/s) Local Time is: Sun Dec 14 02:03:24 2014 SGT SMART support is: Available - device has SMART capability. SMART support is: Enabled === START OF READ SMART DATA SECTION === SMART overall-health self-assessment test result: PASSED General SMART Values: Offline data collection status: (0x00) Offline data collection activity was never started. Auto Offline Data Collection: Disabled. Self-test execution status: ( 0) The previous self-test routine completed without error or no self-test has ever been run. Total time to complete Offline data collection: ( 5564) seconds. Offline data collection capabilities: (0x7b) SMART execute Offline immediate. Auto Offline data collection on/off support. Suspend Offline collection upon new command. Offline surface scan supported. Self-test supported. Conveyance Self-test supported. Selective Self-test supported. SMART capabilities: (0x0003) Saves SMART data before entering power-saving mode. Supports SMART auto save timer. Error logging capability: (0x01) Error logging supported. General Purpose Logging supported. Short self-test routine recommended polling time: ( 2) minutes. Extended self-test routine recommended polling time: ( 709) minutes. Conveyance self-test routine recommended polling time: ( 5) minutes. SCT capabilities: (0x303d) SCT Status supported. SCT Error Recovery Control supported. SCT Feature Control supported. SCT Data Table supported. SMART Attributes Data Structure revision number: 16 Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x002f 200 200 051 Pre-fail Always - 0 3 Spin_Up_Time 0x0027 204 204 021 Pre-fail Always - 8800 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 10 5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0 7 Seek_Error_Rate 0x002e 100 253 000 Old_age Always - 0 9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 288 10 Spin_Retry_Count 0x0032 100 253 000 Old_age Always - 0 11 Calibration_Retry_Count 0x0032 100 253 000 Old_age Always - 0 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 10 192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 6 193 Load_Cycle_Count 0x0032 200 200 000 Old_age Always - 23 194 Temperature_Celsius 0x0022 114 111 000 Old_age Always - 38 196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0 197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0030 100 253 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 1 200 Multi_Zone_Error_Rate 0x0008 100 253 000 Old_age Offline - 0 SMART Error Log Version: 1 No Errors Logged SMART Self-test log structure revision number 1 No self-tests have been logged. [To run self-tests, use: smartctl -t] SMART Selective self-test log data structure revision number 1 SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS 1 0 0 Not_testing 2 0 0 Not_testing 3 0 0 Not_testing 4 0 0 Not_testing 5 0 0 Not_testing Selective self-test flags (0x0): After scanning selected spans, do NOT read-scan remainder of disk. If Selective self-test is pending on power-up, resume after 0 minute delay. == ============================================================================ Quote Link to comment
Shunz Posted December 20, 2014 Author Share Posted December 20, 2014 The first Red 6TB ========================================================================1.15 == invoked as: ./preclear_disk.sh -A -c 3 /dev/sde == WDCWD60EFRX-68MYMN1 == Disk /dev/sde has been successfully precleared == with a starting sector of 1 == Ran 3 cycles == == Using :Read block size = 8388608 Bytes == Last Cycle's Pre Read Time : 13:21:05 (124 MB/s) == Last Cycle's Zeroing time : 12:07:27 (137 MB/s) == Last Cycle's Post Read Time : 26:19:26 (63 MB/s) == Last Cycle's Total Time : 38:27:52 == == Total Elapsed Time 128:41:48 == == Disk Start Temperature: 33C == == Current Disk Temperature: 37C, == ============================================================================ ** Changed attributes in files: /tmp/smart_start_sde /tmp/smart_finish_sde ATTRIBUTE NEW_VAL OLD_VAL FAILURE_THRESHOLD STATUS RAW_VALUE Temperature_Celsius = 115 119 0 ok 37 No SMART attributes are FAILING_NOW 0 sectors were pending re-allocation before the start of the preclear. 0 sectors were pending re-allocation after pre-read in cycle 1 of 3. 0 sectors were pending re-allocation after zero of disk in cycle 1 of 3. 0 sectors were pending re-allocation after post-read in cycle 1 of 3. 0 sectors were pending re-allocation after zero of disk in cycle 2 of 3. 0 sectors were pending re-allocation after post-read in cycle 2 of 3. 0 sectors were pending re-allocation after zero of disk in cycle 3 of 3. 0 sectors are pending re-allocation at the end of the preclear, the number of sectors pending re-allocation did not change. 0 sectors had been re-allocated before the start of the preclear. 0 sectors are re-allocated at the end of the preclear, the number of sectors re-allocated did not change. ============================================================================ ============================================================================ == == S.M.A.R.T Initial Report for /dev/sde == Disk: /dev/sde smartctl 6.2 2013-07-26 r3841 [i686-linux-3.9.11p-unRAID] (local build) Copyright © 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Device Model: WDC WD60EFRX-68MYMN1 LU WWN Device Id: 5 0014ee 2b5aeca78 Firmware Version: 82.00A82 User Capacity: 6,001,175,126,016 bytes [6.00 TB] Sector Sizes: 512 bytes logical, 4096 bytes physical Rotation Rate: 5700 rpm Device is: Not in smartctl database [for details use: -P showall] ATA Version is: ACS-2, ACS-3 T13/2161-D revision 3b SATA Version is: SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s) Local Time is: Mon Oct 13 02:08:11 2014 SGT SMART support is: Available - device has SMART capability. SMART support is: Enabled === START OF READ SMART DATA SECTION === SMART overall-health self-assessment test result: PASSED General SMART Values: Offline data collection status: (0x00) Offline data collection activity was never started. Auto Offline Data Collection: Disabled. Self-test execution status: ( 0) The previous self-test routine completed without error or no self-test has ever been run. Total time to complete Offline data collection: ( 3584) seconds. Offline data collection capabilities: (0x7b) SMART execute Offline immediate. Auto Offline data collection on/off support. Suspend Offline collection upon new command. Offline surface scan supported. Self-test supported. Conveyance Self-test supported. Selective Self-test supported. SMART capabilities: (0x0003) Saves SMART data before entering power-saving mode. Supports SMART auto save timer. Error logging capability: (0x01) Error logging supported. General Purpose Logging supported. Short self-test routine recommended polling time: ( 2) minutes. Extended self-test routine recommended polling time: ( 689) minutes. Conveyance self-test routine recommended polling time: ( 5) minutes. SCT capabilities: (0x303d) SCT Status supported. SCT Error Recovery Control supported. SCT Feature Control supported. SCT Data Table supported. SMART Attributes Data Structure revision number: 16 Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x002f 100 253 051 Pre-fail Always - 0 3 Spin_Up_Time 0x0027 100 253 021 Pre-fail Always - 0 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 3 5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0 7 Seek_Error_Rate 0x002e 100 253 000 Old_age Always - 0 9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 0 10 Spin_Retry_Count 0x0032 100 253 000 Old_age Always - 0 11 Calibration_Retry_Count 0x0032 100 253 000 Old_age Always - 0 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 3 192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 0 193 Load_Cycle_Count 0x0032 200 200 000 Old_age Always - 3 194 Temperature_Celsius 0x0022 119 119 000 Old_age Always - 33 196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0 197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0030 100 253 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x0032 200 253 000 Old_age Always - 0 200 Multi_Zone_Error_Rate 0x0008 100 253 000 Old_age Offline - 0 SMART Error Log Version: 1 No Errors Logged SMART Self-test log structure revision number 1 No self-tests have been logged. [To run self-tests, use: smartctl -t] SMART Selective self-test log data structure revision number 1 SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS 1 0 0 Not_testing 2 0 0 Not_testing 3 0 0 Not_testing 4 0 0 Not_testing 5 0 0 Not_testing Selective self-test flags (0x0): After scanning selected spans, do NOT read-scan remainder of disk. If Selective self-test is pending on power-up, resume after 0 minute delay. == ============================================================================ ============================================================================ == == S.M.A.R.T Final Report for /dev/sde == Disk: /dev/sde smartctl 6.2 2013-07-26 r3841 [i686-linux-3.9.11p-unRAID] (local build) Copyright © 2002-13, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Device Model: WDC WD60EFRX-68MYMN1 LU WWN Device Id: 5 0014ee 2b5aeca78 Firmware Version: 82.00A82 User Capacity: 6,001,175,126,016 bytes [6.00 TB] Sector Sizes: 512 bytes logical, 4096 bytes physical Rotation Rate: 5700 rpm Device is: Not in smartctl database [for details use: -P showall] ATA Version is: ACS-2, ACS-3 T13/2161-D revision 3b SATA Version is: SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s) Local Time is: Sat Oct 18 10:49:59 2014 SGT SMART support is: Available - device has SMART capability. SMART support is: Enabled === START OF READ SMART DATA SECTION === SMART overall-health self-assessment test result: PASSED General SMART Values: Offline data collection status: (0x00) Offline data collection activity was never started. Auto Offline Data Collection: Disabled. Self-test execution status: ( 0) The previous self-test routine completed without error or no self-test has ever been run. Total time to complete Offline data collection: ( 3584) seconds. Offline data collection capabilities: (0x7b) SMART execute Offline immediate. Auto Offline data collection on/off support. Suspend Offline collection upon new command. Offline surface scan supported. Self-test supported. Conveyance Self-test supported. Selective Self-test supported. SMART capabilities: (0x0003) Saves SMART data before entering power-saving mode. Supports SMART auto save timer. Error logging capability: (0x01) Error logging supported. General Purpose Logging supported. Short self-test routine recommended polling time: ( 2) minutes. Extended self-test routine recommended polling time: ( 689) minutes. Conveyance self-test routine recommended polling time: ( 5) minutes. SCT capabilities: (0x303d) SCT Status supported. SCT Error Recovery Control supported. SCT Feature Control supported. SCT Data Table supported. SMART Attributes Data Structure revision number: 16 Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x002f 200 200 051 Pre-fail Always - 0 3 Spin_Up_Time 0x0027 100 253 021 Pre-fail Always - 0 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 3 5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0 7 Seek_Error_Rate 0x002e 100 253 000 Old_age Always - 0 9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 128 10 Spin_Retry_Count 0x0032 100 253 000 Old_age Always - 0 11 Calibration_Retry_Count 0x0032 100 253 000 Old_age Always - 0 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 3 192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 0 193 Load_Cycle_Count 0x0032 200 200 000 Old_age Always - 4 194 Temperature_Celsius 0x0022 115 112 000 Old_age Always - 37 196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0 197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0030 100 253 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 0 200 Multi_Zone_Error_Rate 0x0008 100 253 000 Old_age Offline - 0 SMART Error Log Version: 1 No Errors Logged SMART Self-test log structure revision number 1 No self-tests have been logged. [To run self-tests, use: smartctl -t] SMART Selective self-test log data structure revision number 1 SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS 1 0 0 Not_testing 2 0 0 Not_testing 3 0 0 Not_testing 4 0 0 Not_testing 5 0 0 Not_testing Selective self-test flags (0x0): After scanning selected spans, do NOT read-scan remainder of disk. If Selective self-test is pending on power-up, resume after 0 minute delay. == ============================================================================ Preclear timings for some of my other drives Red 4TB == WDCWD40EFRX-68WT0N0 == Ran 2 cycles == Using :Read block size = 65536 Bytes == Last Cycle's Pre Read Time : 11:08:48 (99 MB/s) == Last Cycle's Zeroing time : 10:09:10 (109 MB/s) == Last Cycle's Post Read Time : 21:21:27 (52 MB/s) == Last Cycle's Total Time : 31:31:36 == Total Elapsed Time 74:07:24 Red 4TB == WDCWD40EFRX-68WT0N0 == Ran 2 cycles == Using :Read block size = 65536 Bytes == Last Cycle's Pre Read Time : 10:38:06 (104 MB/s) == Last Cycle's Zeroing time : 9:42:59 (114 MB/s) == Last Cycle's Post Read Time : 20:34:27 (54 MB/s) == Last Cycle's Total Time : 30:18:25 == Total Elapsed Time 71:12:00 Red Pro 4TB (trying out for my PC) == WDCWD4001FFSX-68JNUN0 == Ran 3 cycles == Using :Read block size = 8388608 Bytes == Last Cycle's Pre Read Time : 8:28:58 (130 MB/s) == Last Cycle's Zeroing time : 8:40:55 (128 MB/s) == Last Cycle's Post Read Time : 16:43:52 (66 MB/s) == Last Cycle's Total Time : 25:25:46 == Total Elapsed Time 85:11:17 Quote Link to comment
tdallen Posted December 20, 2014 Share Posted December 20, 2014 My motherboard pre-clear times are significantly better than my AOC-SAS2LP times - perhaps 17% better for a full cycle? Quote Link to comment
Shunz Posted December 21, 2014 Author Share Posted December 21, 2014 Heh looks like its gonna take 72 full hours to finish a preclear cycle (with pre-read) Quote Link to comment
switchman Posted December 21, 2014 Share Posted December 21, 2014 I think it just depends on the system and how busy it is, plus the options you invoke preclear with. My first took 69.5 hours while my second took ~72. ========================================================================1.15 == invoked as: ./preclear_disk.sh -c 1 -w 32768 -r 32768 -b 1000 /dev/sdh == WDCWD60EFRX-68MYMN1 xxxxxxxxxxxxxxxxxx == Disk /dev/sdh has been successfully precleared == with a starting sector of 1 == Ran 1 cycle == == Using :Read block size = 32768 Bytes == Last Cycle's Pre Read Time : 21:25:09 (77 MB/s) == Last Cycle's Zeroing time : 12:19:57 (135 MB/s) == Last Cycle's Post Read Time : 35:46:00 (46 MB/s) == Last Cycle's Total Time : 69:32:05 == == Total Elapsed Time 69:32:05 Quote Link to comment
Shunz Posted December 22, 2014 Author Share Posted December 22, 2014 Switchman I think you might be on to something - my first preclear was done while I was away on vacation, hence absolutely no other activity such as Plex. Quote Link to comment
Shunz Posted December 25, 2014 Author Share Posted December 25, 2014 Heh 3rd WD 6TB finished preclear, on Christmas. MERRY CHRISTMAS!!! == invoked as: ./preclear_disk.sh -A -c 3 /dev/sdc == WDCWD60EFRX-68MYMN1 WD-WX21D947NSHF == Ran 3 cycles == Using :Read block size = 8388608 Bytes == Last Cycle's Pre Read Time : 13:31:58 (123 MB/s) == Last Cycle's Zeroing time : 16:16:42 (102 MB/s) == Last Cycle's Post Read Time : 26:38:58 (62 MB/s) == Last Cycle's Total Time : 42:56:39 == Total Elapsed Time 159:15:54 == Disk Start Temperature: 31C == Current Disk Temperature: 35C, Quote Link to comment
garycase Posted December 25, 2014 Share Posted December 25, 2014 I've seen fairly notable differences on pre-clears as well. While they're not CPU-intensive operations, nevertheless the bus activity is notably different based on just how much activity is going on with the other disks. So if the pre-clear is the only activity, it'll likely be appreciably faster than if there is a lot of UnRAID activity ... or even if you have multiple pre-clears going on at the same time. ... in short -- I don't think there's anything to worry about Have a Great Christmas Quote Link to comment
Shunz Posted December 25, 2014 Author Share Posted December 25, 2014 Thanks, gary!! Heh I can't wait for the 10TBs to become available. 2-week preclears FTW!!! MERRY CHRISTMAS! Quote Link to comment
garycase Posted December 25, 2014 Share Posted December 25, 2014 ... Heh I can't wait for the 10TBs to become available ... Capacity is a never-ending quest !! ... I still remember just how large I thought my first hard drive was => a 26MB Seagate 14" drive for the bargain price of $4500 (1 10% discount off it's retail price) That's "only" $173,076.923.08 per TB !! Quote Link to comment
Shunz Posted December 25, 2014 Author Share Posted December 25, 2014 Whoah!!! $4,500 is a princely sum! And not even accounting for today's value after inflation, heh. My first was a 1.2Gb Quantum. The guy said "you can put everything you want inside!!!" Quote Link to comment
garycase Posted December 25, 2014 Share Posted December 25, 2014 Yes, that was $4500 1980 dollars => the equivalent of $13,672.80 in 2014 dollars => so in today's dollars that was $525,876,923.09 per TB !!!!! A 2TB drive would cost over a billion dollars at that rate !! ... I think the price of storage has dropped a bit since I bought that drive :) Quote Link to comment
garycase Posted December 25, 2014 Share Posted December 25, 2014 ... Just for grins, this is the drive (the 26MB version) I bought way back when: http://www.vintagecomputer.net/CISC367/Byte%20March%201981%20Ad%20-%20Morrow%2026%20MB%20Hard%20disk%20system.pdf Quote Link to comment
Frank1940 Posted December 26, 2014 Share Posted December 26, 2014 ... Just for grins, this is the drive (the 26MB version) I bought way back when: http://www.vintagecomputer.net/CISC367/Byte%20March%201981%20Ad%20-%20Morrow%2026%20MB%20Hard%20disk%20system.pdf Looks like the date of that Byte Magazine was March 20, 1981. Is that correct? If so, that was about the time that I purchased my first computer--- A Radio Shack Color Computer with 16KB of memory and a cassette tape deck for data and program storage. I can't remember the cost but it was north of $350! Quote Link to comment
Shunz Posted December 26, 2014 Author Share Posted December 26, 2014 Haha out of curiosity, how long did that hard disk last? Quote Link to comment
garycase Posted December 26, 2014 Share Posted December 26, 2014 Looks like the date of that Byte Magazine was March 20, 1981. Is that correct? If so, that was about the time that I purchased my first computer--- A Radio Shack Color Computer with 16KB of memory and a cassette tape deck for data and program storage. I can't remember the cost but it was north of $350! Sounds about right. I was thinking it was 1980 when I bought the disk, but it must have been 1981. By '81 I was on about my 6th or 7th computer -- Altair, IMSAI, North Star, Digital Group, Heathkit H11, Cromemco ... all of which were in the 2-3 thousand range. PC's were an expensive hobby in the 70's ... I remember buying a 16K memory board for well over a thousand dollars. And when you figure what those numbers are in today's dollars, it was a REALLY expensive hobby !! Haha out of curiosity, how long did that hard disk last? It never died -- I eventually gave it away (~1990 or so) to a collector who had a bunch of old S-100 gear. Quote Link to comment
trurl Posted December 26, 2014 Share Posted December 26, 2014 Looks like the date of that Byte Magazine was March 20, 1981. Is that correct? If so, that was about the time that I purchased my first computer--- A Radio Shack Color Computer with 16KB of memory and a cassette tape deck for data and program storage. I can't remember the cost but it was north of $350! Sounds about right. I was thinking it was 1980 when I bought the disk, but it must have been 1981. By '81 I was on about my 6th or 7th computer -- Altair, IMSAI, North Star, Digital Group, Heathkit H11, Cromemco ... all of which were in the 2-3 thousand range. PC's were an expensive hobby in the 70's ... I remember buying a 16K memory board for well over a thousand dollars. And when you figure what those numbers are in today's dollars, it was a REALLY expensive hobby !! Haha out of curiosity, how long did that hard disk last? It never died -- I eventually gave it away (~1990 or so) to a collector who had a bunch of old S-100 gear. I remember lusting after those kits as a poor college student. After college my job involved making Commodore PETs do lab data collection, and I took one of those home to play with for my first computer. 8K RAM, cassette tape, and built-in monochrome CRT. Don't remember the exact cost but I think it was under $1000. Quote Link to comment
garycase Posted December 26, 2014 Share Posted December 26, 2014 Yes, a PET was well under $1000 ... by the time they came out the PC hobby was rapidly switching to an off-the-shelf commercial product lineup with prices WAY below what the early adopter hobbyists had paid. I was spending FAR more than I could really afford on my hobby, but I was "hooked" -- and I had a 2nd job that I worked primarily to cover the expenses of my hobby I spent almost a year's income (at the 2nd job) on that hard drive in 1981 !! [but I really wanted one ] Sometime in that same time frame I bought a NEC Spinwriter printer that also cost close to $4000 !! My first printer had been a 9-pin dot matrix that was about $800 as a KIT that you had to put together (in ~ 1978). Quote Link to comment
Shunz Posted December 27, 2014 Author Share Posted December 27, 2014 Heh, in contrast, today a raspberry pi costs just a few cups of Starbucks! Quote Link to comment
garycase Posted December 27, 2014 Share Posted December 27, 2014 Yes, if you've been doing this long enough, today's PCs seem just about free For what I once paid for a 16KB memory card (~ $1400) you can buy one heck-of-a-system today ... I just built my wife a new PC with a Core i7-4790, 16GB of RAM, a 500GB SSD and 3TB aux drive; a 23" touch screen monitor, and a few other goodies and spent a good bit less than that !! And that was $1400 1977 dollars !! Quote Link to comment
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