We have had a lot of problems with Mammoth-2 drives. We had a lot of media
issues that seemed be drive related versus media related.
Since these are connected to a netapp box, you can't run their mammothtools
diagnostics unless you are willing to connect them to another box to run the
tests.
I would also disconnected all the drives but one and start troubleshooting
there but other than that I have no ideas...You could also try replacing
terminators...they have been (in my experience) the most likely thing to
cause problems.
Good Luck
Jack
> -----Original Message-----
> From: Matthew Huff [mailto:mhuff AT OX DOT COM]
> Sent: Tuesday, October 28, 2003 12:04 PM
> To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
> Subject: [Networker] Problem with Exabyte Mammoth-2 drives
>
> We have two Exabyte 215M tape libraries. Each is separately attached to
> our Network Appliance servers using a dedicated LVD scsi card in each
> server. Lately we have been having major issues with SCSI media errors
> on one of the tape libraries. Since the backup is NDMP, any
> unrecoverable media errors causes the entire backup to abort and start
> over. Given that this is a 658GB volume, we haven't had a good backup in
> a couple of weeks. Exabyte reviewed the logs the tape drives keep
> internally and had us replace the two drives. Unfortunately, the new
> drives are still having the same problem. I've done the normal SCSI
> voodoo (checked cables, etc), but sense key decodes to a media error
> rather than a scsi bus error. We have cleaned the tape drives
> repeatedly, we have used different copies of media. Any suggestions or
> similar problems?
>
> Tue Oct 28 05:19:59 EST [pur-sv-filer2: isp_main:error]: Tape (1.2) hard
> media error: Sense_Key (3) ASC (c) ASCQ (0)
> Tue Oct 28 05:20:07 EST [pur-sv-filer2: isp_main:error]: Tape (1.2) hard
> media error: Sense_Key (3) ASC (c) ASCQ (0)
> Tue Oct 28 06:49:45 EST [pur-sv-filer2: isp_main:error]: Tape (1.2) hard
> media error: Sense_Key (3) ASC (3) ASCQ (2)
> Tue Oct 28 06:50:21 EST [pur-sv-filer2: isp_main:error]: Tape (1.2) hard
> media error: Sense_Key (3) ASC (3) ASCQ (2)
>
>
> ----
> Matthew Huff | One Manhattanville Rd
> Director of Operations | Purchase, NY 10577
> OTA LLC | Phone: 914-460-4039
> mailto:mhuff AT ox DOT com | Fax: 914-460-4139
>
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