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Mehul_Pal's avatar
Mehul_Pal
Level 5
9 years ago
Solved

Tape drive missing issue

in my environment I can see drives are showing in down-tld and when I got to there path it shows missing path in the netbackup console

 

I did scan 

i got the tape 7& changer details.

We have SSO option however I am unable to understand which paths are missing and drives are configured where

what are the commands we can use to check it

below are the result

 

./scan -tape
************************************************************
*********************** SDT_TAPE ************************
************************************************************
------------------------------------------------------------
Device Name : "/dev/nst3"
Passthru Name: "/dev/sg16"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry : "IBM ULT3580-TD4 C7QH"
Vendor ID : "IBM "
Product ID : "ULT3580-TD4 "
Product Rev: "C7QH"
Serial Number: "0007882263"
WWN : ""
WWN Id Type : 0
Device Identifier: "IBM ULT3580-TD4 0007882263"
Device Type : SDT_TAPE
NetBackup Drive Type: 3
Removable : Yes
Device Supports: SCSI-3
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "/dev/nst0"
Passthru Name: "/dev/sg12"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry : "IBM ULT3580-TD4 C7QH"
Vendor ID : "IBM "
Product ID : "ULT3580-TD4 "
Product Rev: "C7QH"
Serial Number: "0007882210"
WWN : ""
WWN Id Type : 0
Device Identifier: "IBM ULT3580-TD4 0007882210"
Device Type : SDT_TAPE
NetBackup Drive Type: 3
Removable : Yes
Device Supports: SCSI-3
Flags : 0x0
Reason: 0x0
[root@kmtmelhnbu bin]# ./scan -changer
************************************************************
*********************** SDT_CHANGER ************************
************************************************************
------------------------------------------------------------
Device Name : "/dev/sg13"
Passthru Name: "/dev/sg13"
Volume Header: ""
Port: -1; Bus: -1; Target: -1; LUN: -1
Inquiry : "IBM 03584L32 C260"
Vendor ID : "IBM "
Product ID : "03584L32 "
Product Rev: "C260"
Serial Number: "0000000185700409"
WWN : ""
WWN Id Type : 0
Device Identifier: "IBM 03584L32 0000000185700409"
Device Type : SDT_CHANGER
NetBackup Robot Type: 8
Removable : Yes
Device Supports: SCSI-3
Number of Drives : 4
Number of Slots : 402
Number of Media Access Ports: 255
Drive 1 Serial Number : "0007882210"
Drive 2 Serial Number : "0007882263"
Drive 3 Serial Number : "00078A334B"
Drive 4 Serial Number : "00078A334C"
Flags : 0x0
Reason: 0x0

  • Michael_G_Ander's avatar
    Michael_G_Ander
    9 years ago

    I would check:

    1. That the tape drive(s) shows as online in the 3584 Web gui

    2. That the tape drive(s) shows as logged in to the fabric in case of fiber attached drives.

    3. That the all the tape drive(s) shows up in the HBA tool in case of fiber attached drives.

    4. That the OS device manager has all the tape drives and the driver is loaded

    One thing to be aware of especially in a SSO setup is that some times drivers are not loaded when there is a tape in the tape drive at startup.

    Always recommend persistent binding for SSO setups as this migates the problem with changing SCSI id's and can make troubleshooting easier.

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  • Marianne's avatar
    Marianne
    Level 6
    9 years ago

    You need to check the GUI carefully to determine which media server is reporting Missing Path.

    This means the OS has lost connectivity to the drive(s) and you need to troubleshoot at OS-level.

    On the media server where you ran the scan command, the OS can see only 2 tape drives:
    Drive 1 Serial Number : "0007882210" - /dev/nst0
    Drive 2 Serial Number : "0007882263" - /dev/nst3

    From above output, we can assume that the 2 missing drives used to be /dev/nst1 and /dev/nst2 but 'something' happened that caused the OS to lose connectivity.

    It has lost connectivity to these 2 drives:
    Drive 3 Serial Number : "00078A334B"
    Drive 4 Serial Number : "00078A334C"

    You need to check physical connection, zoning, errors in /var/log/messages, etc.

    Run scan on all media servers to check and confirm. 

     

    • Michael_G_Ander's avatar
      Michael_G_Ander
      Level 6
      9 years ago

      I would check:

      1. That the tape drive(s) shows as online in the 3584 Web gui

      2. That the tape drive(s) shows as logged in to the fabric in case of fiber attached drives.

      3. That the all the tape drive(s) shows up in the HBA tool in case of fiber attached drives.

      4. That the OS device manager has all the tape drives and the driver is loaded

      One thing to be aware of especially in a SSO setup is that some times drivers are not loaded when there is a tape in the tape drive at startup.

      Always recommend persistent binding for SSO setups as this migates the problem with changing SCSI id's and can make troubleshooting easier.

      • Genericus's avatar
        Genericus
        Moderator
        9 years ago

        tpautoconf -report_disc 

        This command will report discrepancies between what you have and what NetBackup expected.

        You should be able to use the tpautoconf -replace_drive command to update the drives as loing as the OS scan sees them.

         

    • Mehul_Pal's avatar
      Mehul_Pal
      Level 5
      9 years ago

      ys there is one serial number which i m unable to find

      • Marianne's avatar
        Marianne
        Level 6
        9 years ago
        You have not replied to any attempts to help?
        You need to work through all of the suggestions above.