Backup Central

Hi,

I've seen this strange problem wherein a couple of LTO gen. 1 tapes will
not mount or inventory in one of the drives, but they work fine in the
others. I've seen this problem a few times in the past, too. We have a
Storagetek L80 with 4 Seagate LTO drives attached to a Linux
storagenode. The library firmware is: 2.12.07. Drive 1 has Code ver.
1603, drives 2-4 are at: 1522. Drive 1 is newer as it was replaced
recently so it has a newer code release. The primary server is running
Solaris. NetWorker 6.1.1 is running on both machines.

Today, I tried to inventory two tapes in drive 4 (/dev/nst3). Also tried
mounting them and received "Input/Output error". Also received errors in
system log on storage node:

Sep 23 18:16:59 snode kernel: st3: Error with sense data: Info
fld=0x8000, Current st09:03: sense
key Medium Error
Sep 23 18:16:59 snode kernel: Additional sense indicates Unrecovered
read error
Sep 23 18:16:59 snode kernel: st3: Error with sense data: Current
st09:03: sense key Medium Error

However, I only get this error on drive 4, not drives 1-3. The tapes
work fine in the other drives. Go figure?! Other tapes work fine in
drive 4, though, but not those two. All LTO media is the same. We use
Imation. I know we should really be using Fuji or Maxell, but I didn't
order these, and we won't order Imation in the future.

I'm thinking to simply have Storagetek come and swap out that drive, but
just curious to see what people on this news listing have to say about
this. Any theories about this behavior?

Would appreciate any info.

George

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If in doubt and it doesn't cost you anything, have STK replace the suspect
drive. I can say that because we don't use Seagate drives so I know I'll
never get that one :^)

I don't suspect the robot firmware, as it appears the tapes are being
loaded and unloaded properly, but since STK is going to be on-site anyway
you might want to have them upgrade all your drives to the latest firmware.

Conrad Macina
Pfizer, Inc.




On Thu, 23 Sep 2004 16:54:39 -0400, George Sinclair
<George.Sinclair < at > NOAA.GOV> wrote:

Hi,

I've seen this strange problem wherein a couple of LTO gen. 1 tapes will
not mount or inventory in one of the drives, but they work fine in the
others. I've seen this problem a few times in the past, too. We have a
Storagetek L80 with 4 Seagate LTO drives attached to a Linux
storagenode. The library firmware is: 2.12.07. Drive 1 has Code ver.
1603, drives 2-4 are at: 1522. Drive 1 is newer as it was replaced
recently so it has a newer code release. The primary server is running
Solaris. NetWorker 6.1.1 is running on both machines.

Today, I tried to inventory two tapes in drive 4 (/dev/nst3). Also tried
mounting them and received "Input/Output error". Also received errors in
system log on storage node:

Sep 23 18:16:59 snode kernel: st3: Error with sense data: Info
fld=0x8000, Current st09:03: sense
key Medium Error
Sep 23 18:16:59 snode kernel: Additional sense indicates Unrecovered
read error
Sep 23 18:16:59 snode kernel: st3: Error with sense data: Current
st09:03: sense key Medium Error

However, I only get this error on drive 4, not drives 1-3. The tapes
work fine in the other drives. Go figure?! Other tapes work fine in
drive 4, though, but not those two. All LTO media is the same. We use
Imation. I know we should really be using Fuji or Maxell, but I didn't
order these, and we won't order Imation in the future.

I'm thinking to simply have Storagetek come and swap out that drive, but
just curious to see what people on this news listing have to say about
this. Any theories about this behavior?

Would appreciate any info.

George

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