topic Re: Jamaica Array - How to find the failed drive? in Disk

Jamaica Array - How to find the failed drive?

malai2000 — Wed, 25 Aug 2004 10:05:05 GMT

My Server K460 has Jamaica array. Slot A has 3 disks(2 x 4.3 GB, 1x36GB) and slot B has 2 (2x 4.3 GB)disks. server reports that the following disk has failed.

/storage/events/disks/default/8_4.11.0 is >= 3.
Its current value is SERIOUS(4).

I want to remove the failed one and replace with a new 36GB. How to find the failed one?.

8/4.10.0 1 LVM vg04 4095 SEAGATE
ST34573WC
8/4.11.0 1 Unused -- 0 SEAGATE
ST34573WC
8/8.10.0 1 LVM vg03 35242 SEAGATE
ST336737LC
8/8.11.0 1 LVM vg04 4095 SEAGATE
ST34573WC
8/8.9.0 1 LVM vg04 4095 SEAGATE
ST34573WC

Please help.

Thanks
Thirumalai

Re: Jamaica Array - How to find the failed drive?

Geoff Wild — Wed, 25 Aug 2004 10:10:49 GMT

One way:

Start doing a dd for each drive - 1 at a time:

dd if=/dev/rdsk/cXtXdX of=/dev/null

Watch the lights - the failed one should fail....

Rgds...Geoff

Re: Jamaica Array - How to find the failed drive?

Pete Randall — Wed, 25 Aug 2004 10:11:28 GMT

There may be a more elegant way, but you can always use dd and watch the activity lights on the disks.

dd if=/dev/rdsk/cNtNdN of=/dev/null bs=1024k

Go through your disks one at a time, noting which device file corrseponds to which disk. The failed disk will give your an I/O error, the rest should complete the dd without problems.

Pete

Re: Jamaica Array - How to find the failed drive?

Pete Randall — Wed, 25 Aug 2004 10:12:58 GMT

You should also be aware that, if the failed disk is one of the smaller ones, it may require re-creation of the volume group in order to utilize the new, larger device, due to the max PE per PV settings that already exist.

Pete

Re: Jamaica Array - How to find the failed drive?

Robert-Jan Goossens — Wed, 25 Aug 2004 10:16:15 GMT

Hi Thirumalai,

The being marked as Unused is failing (4,5 GB disk). It is on of the disks in slot B, you could use the dd command ( look at the led's in the cabinet) to find the exact disk.

# dd if=/dev/rdks/cxtydz of=/dev/null bs=512k
change xyz for your device files.

Regards,
Robert-Jan

Re: Jamaica Array - How to find the failed drive?

John Palmer — Wed, 25 Aug 2004 10:18:43 GMT

Two ways that I can think of...

1. Check the dip switch settings on the back of the Jamaica cabinet. Your failed disk is address 11 in slot B(2 disks). 11 is binary 1011 so look for that switch combination.

2. Identify the good disk in slot B by running the following:
ioscan -funC disk
get the disk name for path 8/4.10.0
dd if=/dev/rdsk/c?t10d0 of=/dev/null bs=64k
This will illuminate the activity light on the good disk, the other is the failed one.

Good Luck,
John

Re: Jamaica Array - How to find the failed drive?

Thierry Poels_1 — Wed, 25 Aug 2004 10:43:40 GMT

hi,

look at the back of your server, locate SCSI card 8/4, follow the cable to the Jamaica box. At the back of that Jamaica box locate the disk with SCSI address 11.

Note: two bus addresses used 8/4 & 8/8 --> Jamaica box split up in 2 halves, 2 Jamaica boxes, or internal disks ?

regards,
Thierry