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2 drive failure with incorrect parity, what can still be done?

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Hi there,

 

I have a huge problem, whereby a rebuilt was not successful because another drive was giving lots of error messages. Unbeknown to me I then started to replace the second drive thinking that the first rebuild was successful. So I now shutdown my array and I have put the drive which was red balled into another machine and powered it up with the same version of unRaid 6 Beta 6 and it appears that I can access that data when I mount it from unMenu. The original drive where the rebuild never completed does not exist anymore, so I cannot start that rebuild anymore. So I am quite sure I have lost 2 tb of data, but any help is greatly appreciated.

 

=== START OF INFORMATION SECTION ===
Model Family:     SAMSUNG SpinPoint F4 EG (AF)
Device Model:     SAMSUNG HD204UI
Serial Number:    S2HGJ1AZ801622
LU WWN Device Id: 5 0024e9 003e6b86d
Firmware Version: 1AQ10003
User Capacity:    2,000,398,934,016 bytes [2.00 TB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    5400 rpm
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ATA8-ACS T13/1699-D revision 6
SATA Version is:  SATA 2.6, 3.0 Gb/s
Local Time is:    Sun Aug  3 08:09:52 2014 PDT

==> WARNING: Using smartmontools or hdparm with this
drive may result in data loss due to a firmware bug.
****** THIS DRIVE MAY OR MAY NOT BE AFFECTED! ******
Buggy and fixed firmware report same version number!
See the following web pages for details:
http://knowledge.seagate.com/articles/en_US/FAQ/223571en
http://sourceforge.net/apps/trac/smartmontools/wiki/SamsungF4EGBadBlocks

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:      ( 121)	The previous self-test completed having
				the read element of the test failed.
Total time to complete Offline 
data collection: 		(21420) seconds.
Offline data collection
capabilities: 			 (0x5b) SMART execute Offline immediate.
				Auto Offline data collection on/off support.
				Suspend Offline collection upon new
				command.
				Offline surface scan supported.
				Self-test supported.
				No 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: 	 ( 357) minutes.
SCT capabilities: 	       (0x003f)	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   100   051    Pre-fail  Always       -       4
  2 Throughput_Performance  0x0026   252   252   000    Old_age   Always       -       0
  3 Spin_Up_Time            0x0023   067   066   025    Pre-fail  Always       -       10162
  4 Start_Stop_Count        0x0032   095   095   000    Old_age   Always       -       5854
  5 Reallocated_Sector_Ct   0x0033   252   252   010    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x002e   252   252   051    Old_age   Always       -       0
  8 Seek_Time_Performance   0x0024   252   252   015    Old_age   Offline      -       0
  9 Power_On_Hours          0x0032   100   100   000    Old_age   Always       -       6647
10 Spin_Retry_Count        0x0032   252   252   051    Old_age   Always       -       0
11 Calibration_Retry_Count 0x0032   252   252   000    Old_age   Always       -       0
12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       183
181 Program_Fail_Cnt_Total  0x0022   100   100   000    Old_age   Always       -       320352
191 G-Sense_Error_Rate      0x0022   100   100   000    Old_age   Always       -       1432
192 Power-Off_Retract_Count 0x0022   252   252   000    Old_age   Always       -       0
194 Temperature_Celsius     0x0002   064   054   000    Old_age   Always       -       31 (Min/Max 15/47)
195 Hardware_ECC_Recovered  0x003a   100   100   000    Old_age   Always       -       0
196 Reallocated_Event_Count 0x0032   252   252   000    Old_age   Always       -       0
197 Current_Pending_Sector  0x0032   100   100   000    Old_age   Always       -       1
198 Offline_Uncorrectable   0x0030   252   252   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x0036   200   200   000    Old_age   Always       -       0
200 Multi_Zone_Error_Rate   0x002a   100   100   000    Old_age   Always       -       2
223 Load_Retry_Count        0x0032   252   252   000    Old_age   Always       -       0
225 Load_Cycle_Count        0x0032   100   100   000    Old_age   Always       -       5876

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Short offline       Completed: read failure       90%      6647         2374234896
# 2  Short offline       Completed: read failure       90%      6647         2374234896

SMART Selective self-test log data structure revision number 0
Note: revision number not 1 implies that no selective self-test has ever been run
SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
    1        0        0  Completed_read_failure [90% left] (0-65535)
    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.

The simplest (not rigorous or thorough) way to get back operational would be to set a new configuration, and let it rebuild parity with whatever it can read. Are the rest of the drives healthy?

At this point, I'd agree with jonathanm => set a New Config which does NOT include either of your failed drives; let it build parity so the array is protected;  then do a parity check to confirm that was all successful;  and THEN start data recovery from your failed drives.

 

IF you happen to have backups [You should of course, but many folks don't ... you may want to read this:  http://lime-technology.com/forum/index.php?topic=31020.0 ], the "recovery" is trivial:  just copy the missing data from your backups.

 

I gather from your comments ("... have a huge problem." and "... I am quite sure I have lost 2 tb of data")  that you do NOT have backups;  so what you'll want to do after you have a good array is connect the drive that still has data on it to a Windows PC, install the free Linux Reader [ http://www.diskinternals.com/linux-reader/ ], and then copy the files from that drive back to your server [if you need more disk space, you'll have to first add another data drive to the server].

 

You may want to re-think your backup strategy so this doesn't happen again  :)

Note:  If you don't have a Windows PC to use, you can also attach the drive with the data you want to copy to any other old spare PC;  boot a free version of UnRAID and assign that drive to that version as a data drive (with no parity drive) ... and then just copy the data from that UnRAID server to your primary one.

 

Note that if you do this, you need to be sure you change the name of the UnRAID server [You can't have two "Tower" systems]

 

  • 1 month later...
  • Author

ok I have now started the new configuration with 3 drives removed and 3 new drives inserted and started the rebuild, which has started. but am I meant to see the contents of my shares? I see see on under /diskxx the data but not under //tower/sharename... is that normal?

 

is this normally caused by cable issues?

 

Sep  8 12:47:59 Tower kernel: REISERFS error (device md14): vs-13070 reiserfs_read_locked_inode: i/o failure occurred trying to find stat data of [7175 10213 0x0 SD]

Sep  8 12:47:59 Tower kernel: REISERFS warning: reiserfs-5090 is_tree_node: node level 14247 does not match to the expected one 3

Sep  8 12:47:59 Tower kernel: REISERFS error (device md14): vs-5150 search_by_key: invalid format found in block 373216999. Fsck?

Sep  8 12:47:59 Tower kernel: REISERFS error (device md14): vs-13070 reiserfs_read_locked_inode: i/o failure occurred trying to find stat data of [9874 9875 0x0 SD]

Sep  8 12:47:59 Tower kernel: REISERFS warning: reiserfs-5090 is_tree_node: node level 25565 does not match to the expected one 2

Sep  8 12:47:59 Tower kernel: REISERFS error (device md14): vs-5150 search_by_key: invalid format found in block 353699823. Fsck?

Sep  8 12:47:59 Tower kernel: REISERFS error (device md14): vs-13070 reiserfs_read_locked_inode: i/o failure occurred trying to find stat data of [7175 10213 0x0 SD]

Sep  8 12:47:59 Tower kernel: REISERFS warning: reiserfs-5090 is_tree_node: node level 14247 does not match to the expected one 3

Sep  8 12:47:59 Tower kernel: REISERFS error (device md14): vs-5150 search_by_key: invalid format found in block 373216999. Fsck?

Sep  8 12:47:59 Tower kernel: REISERFS error (device md14): vs-13070 reiserfs_read_locked_inode: i/o failure occurred trying to find stat data of [9874 9878 0x0 SD]

 

should I be stopping parity sync

 

Sep  8 12:31:51 Tower shfs/user: shfs_readdir: fstatat: Boss (13) Permission denied (Drive related)

Sep  8 12:31:51 Tower shfs/user: shfs_readdir: readdir_r: /mnt/disk14/series (13) Permission denied

Sep  8 12:31:51 Tower kernel: REISERFS warning: reiserfs-5090 is_tree_node: node level 31632 does not match to the expected one 1 (Minor Issues)

Sep  8 12:31:51 Tower kernel: REISERFS error (device md14): vs-5150 search_by_key: invalid format found in block 301802752. Fsck? (Errors)

Sep  8 12:31:51 Tower kernel: REISERFS error (device md14): vs-13070 reiserfs_read_locked_inode: i/o failure occurred trying to find stat data of [723 1108 0x0 SD] (Errors)

Sep  8 12:33:01 Tower shfs/user: shfs_readdir: fstatat: Boss (13) Permission denied (Drive related)

Sep  8 12:33:01 Tower shfs/user: shfs_readdir: readdir_r: /mnt/disk14/series (13) Permission denied

Sep  8 12:33:01 Tower kernel: REISERFS warning: reiserfs-5090 is_tree_node: node level 31632 does not match to the expected one 1 (Minor Issues)

Sep  8 12:33:01 Tower kernel: REISERFS error (device md14): vs-5150 search_by_key: invalid format found in block 301802752. Fsck? (Errors)

Sep  8 12:33:01 Tower kernel: REISERFS error (device md14): vs-13070 reiserfs_read_locked_inode: i/o failure occurred trying to find stat data of [723 1108 0x0 SD] (Errors)

Sep  8 12:33:54 Tower sshd[4302]: Accepted password for root from 192.168.0.7 port 55712 ssh2

Sep  8 12:34:35 Tower shfs/user: shfs_readdir: fstatat: Boss (13) Permission denied (Drive related)

Sep  8 12:34:35 Tower shfs/user: shfs_readdir: readdir_r: /mnt/disk14/series (13) Permission denied

 

how can it get permission denied?

syslog-2014-09-08.zip

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