Dave,

Hilde

Werth, Dave wrote:

Hilde,

We're using Networker 6.1 on Windows 2K with Sony SDX-500C AIT-2 tape
drives.  I've occasionally seen the Cyclic Redundancy Check (CRC) errors.  I
usually get the errors when I'm labeling tapes (I label my tapes manually)
and it's either because the tape drive needs cleaning or because the tapes
have been used enough that they're getting worn out.

I know AIT-2 drives are supposed to be self cleaning but Spectralogic, our
jukebox vendor, recommends running a cleaning tape through the drives
approximately every 100 hours of use.  There's an article on the subject at:

http://www.spectralogic.com/index.cfm?fuseaction=support.kbArticle&KbaseId=2
64

(Note: if the url wraps in your email you may need to put it pack together
to use it.)

Because the errors you're getting are part way through backups on several
different tapes I suspect either you need to run a cleaning tape through
your tape drives or the drives themselves are in need of repair.  It's
possible though if the tapes have been used a lot for a long time that they
are getting worn out.

Hope this helps.

Dave

David Werth
Garmin AT, Inc
(formerly: UPS Aviation Technologies)
(formerly: II Morrow)
Salem, Oregon
dave.werth AT garmin DOT com

-----Original Message-----

From: Hildegard Gerlach [mailto:hildegard.gerlach AT JRC DOT IT] Sent: Friday, April 29, 2005 4:41 AM

To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: [Networker] tape/drive problems

I am working with Networker 6.1 on a Windows 2000 Server. In the last days I regularly get one of the following error messages:

Apr 11 12:29:59 backup-machine: NetWorker media: (warning) \\.\Tape1 writing: Data error (cyclic redundancy check)., at file 2 record 613 Apr 11 12:29:59 backup-machine: NetWorker media: (notice) 8mm AIT-2 tape 000263 on \\.\Tape1 is full Apr 11 12:29:59 backup-machine: NetWorker media: (notice) 8mm AIT-2 tape 000263 used 39 MB of 50 GB capacity Apr 11 12:29:59 backup-machine: NetWorker media: (warning) verification of volume "000263", volid 1515195649 failed, read open error: No error Apr 11 12:29:59 backup-machine: NetWorker media: (notice) verification of volume "000263", volid 1515195649 failed, volume is being marked as full. Apr 21 20:13:31 backup-machine: NetWorker media: (warning) \\.\Tape1 moving: fsf 27: Data error (cyclic redundancy check). Apr 21 20:13:31 backup-machine: NetWorker media: (info) fsf 27: Data error (cyclic redundancy check).

Apr 28 23:25:18 backup-machine: NetWorker media: (warning) \\.\Tape1 writing: Data error (cyclic redundancy check)., at file 33 record 1475 Apr 28 23:25:18 backup-machine: NetWorker media: (notice) 8mm AIT-2 tape 000267 on \\.\Tape1 is full Apr 28 23:25:18 backup-machine: NetWorker media: (notice) 8mm AIT-2 tape 000267 used 5214 MB of 50 GB capacity Apr 28 23:25:18 backup-machine: NetWorker media: (warning) verification of volume "000267", volid 1846532865 failed, read open error: No error Apr 28 23:25:18 backup-machine: NetWorker media: (notice) verification of volume "000267", volid 1846532865 failed, volume is being marked as full. Apr 28 23:25:18 backup-machine: NetWorker media: (notice) Save set (1901290241) backup-machine:index:bb253f9f-00000004-406c31ec-406c31eb-00020000-14000007 volume 000267 on \\.\Tape1 is being terminated because: Media verification failed

Afterwards the tapes are marked as full, the drive is not able to unload the tape (I have to do it manually). It happens to both drives tape0 and tape1 . First it happened only to drive \tape2, then I disabled it, then it happened to \tape0 as well. In the event viewer is the following message: The device \Device\Tape1 has a bad block.

and in the log file:

04/26/05 11:37:21 AM nsrd: media info: unload error for jukebox '[email protected]' detected. Retrying

The Networker monitor shows : tape1 read open error: No error

We use a Qualstar TLS-4222i Jukebox with 2 SONY SDX-500C drives.

Is it a problem of the tapes, of the drives or what else ?

Any help appreciated.

Thanks

Hilde Gerlach

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