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possible drive failure - where do I start?


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If memory serves its /dev/sdc, disk 6.

As far as I can see, it is there in the syslog:

Nov  8 19:07:33 Unraid kernel: md: unRAID driver 1.1.1 installed

Nov  8 19:07:33 Unraid kernel: md: import disk0: [8,48] (sdd) ST32000542AS    6XW048F6 size: 1953514552

Nov  8 19:07:33 Unraid kernel: md: import disk1: [8,64] (sde) WDC WD7500AACS-0 WD-WCASM0003415 size: 732574552

Nov  8 19:07:33 Unraid kernel: md: import disk2: [8,112] (sdh) ST3500630AS      6QG09VT9 size: 488385492

Nov  8 19:07:33 Unraid kernel: md: import disk3: [8,96] (sdg) ST31500541AS    5XW0AHXN size: 1465138552

Nov  8 19:07:33 Unraid kernel: md: import disk4: [8,80] (sdf) ST31500341AS    9VS1V882 size: 1465138552

Nov  8 19:07:33 Unraid kernel: md: import disk5: [8,16] (sdb) ST32000542AS    6XW054H9 size: 1953513492

Nov  8 19:07:33 Unraid kernel: md: import disk6: [8,32] (sdc) ST32000542AS    5XW120SK size: 1953513492

and I see no failures.

 

Did you post the correct syslog?

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So, I got frustrated with this and ha an extra disk do I went ahead an popped it in and the array rebuilt and everything seemed fine. Last night I go to the web interface and the same disk is missing again. This indicates to me that there must be some other hardware issue. Maybe the hot swap backplane or the cable so I'll start there. Also, I think I'll test my original drive and if it's good add it back to the system once I find the problem.

 

Thoughts? Advice?

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So, I got frustrated with this and ha an extra disk do I went ahead an popped it in and the array rebuilt and everything seemed fine. Last night I go to the web interface and the same disk is missing again. This indicates to me that there must be some other hardware issue. Maybe the hot swap backplane or the cable so I'll start there. Also, I think I'll test my original drive and if it's good add it back to the system once I find the problem.

 

Thoughts? Advice?

no, you have an intermittent hardware issue.  You must isolate.  Nothing else anyone can do for you.

 

It could be a loose cable, or, it could be a power supply splitter, or a drive tray, or even a power supply inadequate to supply all your disks.

Just remember, a disk that has been disabled was disabled because a write to it failed.  (it is guaranteed to be incorrect)

It will not go back to green without you un-assigning it, starting the array with it un-assigned, re-assigning it, then starting the array once more and letting it re-construct the drive with the correct data, as re-constructed from parity and all the other data disks.

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If I move one of the good disks to a different data port will it still be recognized?

depends on the version of unRAID. 

 

In older releases, you'll probably need to use the devices assignment page to assign it to its correct slot.

On the newest beta release, it will probably recognize it on its own by the serial number.

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all SATA cables are secure and seem to be fine. I took out a power splitter that I had in there and rearranged the power cords to ensure that the hot swap black planes that were actually being used were connected directly to the power supply, its a 750W corsair. The disk still didn't show up so I assume that it is an issue with the specific slot on the SATA backplane. I moved the disk to another slot on a different backplane and the disk was recognized and parity is being rebuilt. While I have the machine on the workbench is there anything else that I should check?

 

Also, is there a log or something that i can get from the boot up process to see if I need to update the bios for the motherboard or the SATA add on card?

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