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Tape drive down very often

appu1985
Level 4

Hi All,

We are facing the tape drive down issue very often,

we have 1 master server = linux VM

             2 media server = linux stanalone machine

 

Drive Name               Label   Ready  RecMID  ExtMID  Wr.Enbl.  Type
   Host                       DrivePath                            Status
=============================================================================
HP.ULTRIUM6-SCSI.000     Yes     Yes    CIM204  CIM204  Yes       hcart3
   med01x    /dev/nst0                            ACTIVE
   med02x   /dev/nst0                            SCAN-TLD
HP.ULTRIUM6-SCSI.001     No      No                     No        hcart3
   med01x    /dev/nst3                            DOWN-TLD
   med02x    /dev/nst3                            DOWN-TLD
HP.ULTRIUM6-SCSI.002     No      No                     No        hcart3
   med01x     /dev/nst2                            DOWN-TLD
   med02x     /dev/nst2                            SCAN-TLD
HP.ULTRIUM6-SCSI.003     No      No                     No        hcart3
   med01x     /dev/nst1                            TLD
   med02x /dev/nst1                            SCAN-TLD

2 ACCEPTED SOLUTIONS

Accepted Solutions

Jim-90
Level 6

If the tape drives are shared between the two media servers you need persistence binding enabled.  If  they shared blow away the robots and tape drives within NBU and rebuild then through GUI that should fix it until the next time you reboot a media server.  Rebooting a media could mess up the order of SCSI id assigment.

View solution in original post

Michael_G_Ander
Level 6
Certified

If shared tape drives make sure that the drivers support SCSI reservation and it is enabled in Netbackup

Think it is default, but have seen lack of SCSI resevation awareness cause lot of problems with DOWN'ed tape drives so think it is worth checking.

The standard questions: Have you checked: 1) What has changed. 2) The manual 3) If there are any tech notes or VOX posts regarding the issue

View solution in original post

5 REPLIES 5

Marianne
Moderator
Moderator
Partner    VIP    Accredited Certified

The only way to troubleshoot DOWN drives is to enable logging.

Create bptm log folders on all media servers, and add VERBOSE entry to vm.conf on all media servers followed be restart of NBU.

UP all the drives that are DOWN.

Next time a drives is DOWNed, look for errors in bptm log as well as /var/log/messages on the media server that DOWNed the drive.

Jim-90
Level 6

If the tape drives are shared between the two media servers you need persistence binding enabled.  If  they shared blow away the robots and tape drives within NBU and rebuild then through GUI that should fix it until the next time you reboot a media server.  Rebooting a media could mess up the order of SCSI id assigment.

Michael_G_Ander
Level 6
Certified

If shared tape drives make sure that the drivers support SCSI reservation and it is enabled in Netbackup

Think it is default, but have seen lack of SCSI resevation awareness cause lot of problems with DOWN'ed tape drives so think it is worth checking.

The standard questions: Have you checked: 1) What has changed. 2) The manual 3) If there are any tech notes or VOX posts regarding the issue

Marianne
Moderator
Moderator
Partner    VIP    Accredited Certified

This user seems to have a habit of not replying to attempts to help.... 

No reply to any of user's new discussions started over the last year.

revarooo
Level 6
Employee

If someone cannot be bothered to come back and reply and mark any posts that helped as solution, they should be blacklisted, if they are repeated offenders, imo.