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tarmizi's avatar
tarmizi
Level 5
11 years ago

Missing_path

Hi all, One of my customer have this IBM TS3310 tape library with 6 drives where 3 of them showed as down and in drive path showing "MISSING_PATH". My customer reported to the IBM technical support...
Backup and Recovery
Configuring
Error messages
Managing Backup Devices
NetBackup
Troubleshooting
Windows Server (2003-2008)
  • Marianne's avatar
    Marianne
    11 years ago

    MISSING_PATH means that the OS has lost connectivity to the tape drive.

    scan -changer output tells us that the robot can see the tape drives through its internal connection to the drives.

    You need to confirm that the OS can see the drives through the SAN or direct cable connection to the tape drives. (With this amount of drives, probably SAN.)

    First of all, check Device Manager. Delete any tape drives that are currently listed and then perform a rescan.

    If drives are not coming back, you need to check zoning.
    If drives come back after the scan, use 'scan' (without any options) to ensure that tape drives are responding to scsi commands. If drives with OS paths are seen, you can re-config drives in NBU.

    Important that you find out WHY the OS lost connectivity to the drives.
    Check Event Viewer System log for device/HBA-related errors.

    Use HBA management software (e.g. SanSurfer if Qlogic HBAs) to ensure Persistent Binding is in place.
     

tarmizi's avatar
tarmizi
Level 5
11 years ago

Hi all,

When we speak of Device Manager, this is what I get. The OS detected 6 drives for IBM. What I am going to do next? There are only 6 physical drives but when I ran tpconfig -d, I can see there are 8 of them. I am guessing that my customer had replaced those drives but not updated in EMM (except for 1310177029) . 

 Device Manager.jpg

4   IBM.ULT3580-TD4.000  hcart  TLD(1)  DRIVE=6
      MISSING_PATH:{3,0,2,0}:1310035197                                DOWN
5   IBM.ULT3580-TD4.001  hcart  TLD(1)  DRIVE=5
      {3,0,1,0}                                                        UP
6   IBM.ULT3580-TD4.002  hcart  TLD(1)  DRIVE=4
      MISSING_PATH:{3,0,3,0}:1310034178                                DOWN
7   IBM.ULT3580-TD4.003  hcart  TLD(1)  DRIVE=2
      MISSING_PATH:{3,0,5,0}:1310177029                                DOWN
8   IBM.ULT3580-TD4.004  hcart  TLD(1)  DRIVE=1
      {3,0,2,0}                                                        UP
9   IBM.ULT3580-TD4.005  hcart  TLD(1)  DRIVE=3
      {3,0,3,0}                                                        UP
10  IBM.ULT3580-TD4.006  hcart  TLD(1)  DRIVE=6
      {3,0,0,0}                                                        DOWN
11  IBM.ULT3580-TD4.007  hcart  TLD(1)  DRIVE=6
      MISSING_PATH:{3,0,3,0}:1310214688                                DOWN