The device is not connected - What is causing this?

Question

Networker (7.3) seems to lose its connection to one of its two tape drives. Once this happens all the subsequent backups fails. This has happened several times and it is not isolated to one specific drive. What would cause this? The tape drive hardware seems to fine.
* Could it be the tape device configuration in Networker? The device media is set to LTO Ultrium but we are using LTO Ultirum-4 tapes.
* Could it be that the compression is handeled by the tape unit not networker?
*Could it be an intermittent hardware problem?
Below is the log entry when the problem occurted:
04/04/09 04:39:52 nsrd: media warning: \\.\Tape0 writing: The device is not connected., at file 472 record 5559
04/04/09 04:39:52 nsrmmd #2: check_tapealert: check_cdi_infop and cdi_open failed, the device file name specified is unusable by CDI for device \\.\Tape0
Errno indicates : Unknown error
04/04/09 04:39:52 nsrd: media notice: LTO Ultrium tape 000060L4 on \\.\Tape0 is full
04/04/09 04:39:52 nsrd: media notice: LTO Ultrium tape 000060L4 used 484 GB of 800 GB capacity
04/04/09 04:39:52 nsrd: media warning: verification of volume "000060L4", volid 129421128 failed, read open error: drive status is
04/04/09 04:39:52 nsrd: media notice: verification of volume "000060L4", volid 129421128 failed, volume is being marked as full.
04/04/09 04:39:52 nsrd: write completion notice: Writing to volume 000060L4 complete
04/04/09 04:39:52 nsrd: media notice: Save set (30871058) bandb1.admin.utc.edu:/archive volume 000060L4 on \\.\Tape0 is being terminated because: Media verification failed
04/04/09 04:39:52 nsrd: bandb1.admin.utc.edu:/archive done saving to pool 'Oracle' (000060L4) 112 GB
04/04/09 04:39:52 savegrp: command ' save -s datavault.utc.edu -g Oracle -LL -f - -m bandb1.admin.utc.edu -l full -q -W 78 -N /archive /archive' for client bandb1.admin.utc.edu exited with return code 1
04/04/09 04:39:52 savegrp: bandb1.admin.utc.edu:/archive failed.
04/04/09 04:39:52 savegrp: bandb1.admin.utc.edu:/archive will retry 1 more time(s)
04/04/09 04:39:52 nsrd: media notice: Save set (47648222) bandb1.admin.utc.edu:/dbf volume 000060L4 on \\.\Tape0 is being terminated because: Media verification failed

Thanks for your help!

amediratta · Answer

the first thing that comes to my mind is what is 7.3 release: upgrade to 7.3.4 at the earliest OR 7.4.4. Several 7.3 releases have been having such library/media errors especially if it is 7.3 native.

ble1 · Answer

Usually this sort of problem was related to driver in the past.

DavidHampson · Answer

Early versions of the nsrlcpd tended to be a little unreliable so I would suggest you upgrade to a more up-to-date version. However that affects the libraries and this seems to be an effect on tape drives only. Also I do not have a 7.3 hardware compatibility list handy but were LTO4 drives supported by 7.3?

ble1 · Answer

From HW compatibility point of view 7.3.x will work with LTO4 even if media type would not exist in list of known devices; you could present it as LTO3 and it would work fine.

baldguy1 · Answer

Thanks for you help , we will be upgrading soon

tienlamnguyen · Answer

Look @ the deamon.raw file in your storage node if you have errors pertaining to nsrlcpd.

Jiju1 · Answer

Hi,

There was a problem with 7.3 and even with 7.4.2 related witht he libraries , Kindly update the 7.3 to 7.4.4 , its a stable version and problem has been resolved in the 7.4.4 . Update and revert back.

Rajesh S

NetWorker

The device is not connected - What is causing this?

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