July 4, 201016 yr I added a sixth drive to my setup and now that it is in and part of the array I am seeing 17MB/s write speeds in Windows when before this upgrade I was getting 34MB/s. Has anyone ever seen this before? Attached is my syslog. Thanks in advance. syslog-2010-07-04.txt
July 5, 201016 yr I added a sixth drive to my setup and now that it is in and part of the array I am seeing 17MB/s write speeds in Windows when before this upgrade I was getting 34MB/s. Has anyone ever seen this before? Attached is my syslog. Thanks in advance. ...as what I can read from your syslog.. - it appears that you have added a fifth and sixth disk or at least swapped disk orders during the way... - have some advanced format drives WD20EARS inside - that at least one of the SATA drives is connected through an IDE interface Jul 4 14:51:17 NAS kernel: md: unRAID driver 0.95.4 installed Jul 4 14:51:17 NAS kernel: md: import disk0: [8,16] (sdb) WDC WD20EARS-00S WD-WCAVY2471148 offset: 63 size: 1953514552 Jul 4 14:51:17 NAS kernel: md: import disk1: [8,32] (sdc) WDC WD20EARS-00S WD-WCAVY2471173 offset: 63 size: 1953514552 Jul 4 14:51:17 NAS kernel: md: import disk2: [8,48] (sdd) WDC WD20EARS-00S WD-WCAVY2472401 offset: 63 size: 1953514552 Jul 4 14:51:17 NAS kernel: md: import disk3: [8,0] (sda) WDC WD20EARS-00S WD-WCAVY2474599 offset: 63 size: 1953514552 Jul 4 14:51:17 NAS kernel: md: import disk4: [22,64] (hdd) WDC WD6400AAKS-00H2B0 WD-WMASY6485107 offset: 63 size: 625131832 Jul 4 14:51:17 NAS kernel: md: import disk5: [22,0] (hdc) WDC WD20EARS-00MVWB0 WD-WMAZ20420852 offset: 63 size: 1953514552 Jul 4 14:51:17 NAS kernel: md: disk5 new disk ...are you by any chance using an IDE to SATA converter? I personally would not opt for such a setup.... ...have you jumpered ALL your Advanced Format Drives (WDxxEARS) for use inside unRAID accordingly?
July 5, 201016 yr I added a sixth drive to my setup and now that it is in and part of the array I am seeing 17MB/s write speeds in Windows when before this upgrade I was getting 34MB/s. To just the new drive or to all drives?
July 5, 201016 yr Author OK so I guess posting a syslog shows off everything. Here is a little more story then. I indeed did plan on adding two drives so I added them both to the motherboard and did a preclear on the 5th drive, the (hdd - WDC WD6400AAKS-00H2B0) and once the preclear was finished I assigned it to the array and tested that I was still achieving my 34MB/s. I then proceeded to preclear the 6th drive (hdc - WDC WD20EARS-00MVWB0). I found the preclear to cause some significant performance issues (thread here about it http://lime-technology.com/forum/index.php?topic=2817.msg66645#msg66645) while it was running but I let it finish. I then assigned this drive to the array and then tested. This is when I found that I was had dropped in performance to 17MB/s. Answering some questions Yes I have jumpered ALL the EARS drives. I noticed the strange SATA to IDE detection as well and that confused me. I am not using any sort of converter. In fact I have the SATA connectors plugged directly in to the motherboard on SATA channel 5 and 6. They are in the same bank of SATA connections as 1-4 so I am confused why they are being detected as IDE by unRAID.
July 5, 201016 yr I noticed the strange SATA to IDE detection as well and that confused me. I am not using any sort of converter. In fact I have the SATA connectors plugged directly in to the motherboard on SATA channel 5 and 6. They are in the same bank of SATA connections as 1-4 so I am confused why they are being detected as IDE by unRAID. It is because Window's XP and previous OS do not contain any SATA drivers. To make the motherboard usable with them it defaults to configuring the SATA ports to a legacy IDE emulation mode. You need to configure your BIOS to take it out of that mode. Joe L.
July 5, 201016 yr Author I noticed the strange SATA to IDE detection as well and that confused me. I am not using any sort of converter. In fact I have the SATA connectors plugged directly in to the motherboard on SATA channel 5 and 6. They are in the same bank of SATA connections as 1-4 so I am confused why they are being detected as IDE by unRAID. It is because Window's XP and previous OS do not contain any SATA drivers. To make the motherboard usable with them it defaults to configuring the SATA ports to a legacy IDE emulation mode. You need to configure your BIOS to take it out of that mode. Joe L. 4 of the 6 are defaulting to SATA, I would be very shocked to find that channels 4 and 5 have different Defaults, however I will check tonight and report back.
July 5, 201016 yr Inside of BIOS, be sure to select "AHCI" if available. The range of choices are usually AHCI, RAID, and Native / IDE / Legacy. Depending on your motherboard, SATA points 5 and 6 may be provided via a JMicron chip instead of the northbridge and hence has it's own configuration settings which can have different default values.
July 5, 201016 yr Author Inside of BIOS, be sure to select "AHCI" if available. The range of choices are usually AHCI, RAID, and Native / IDE / Legacy. Depending on your motherboard, SATA points 5 and 6 may be provided via a JMicron chip instead of the northbridge and hence has it's own configuration settings which can have different default values. I will check it out tonight, thanks again.
July 6, 201015 yr Author What is your motherboard? It is an ASUS. So I went in to the BIOS and sure enough channel 4 and 5 are on a separate chipset then 0 to 3. I have put both to AHCI and now I am getting 28MB/s. Still slower then my 35MB/s I had before but I can possibly live with it. Thanks everyone for the assistance and suggestions.
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