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Tape drive missing issue

Mehul_Pal
Level 5

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

1 ACCEPTED SOLUTION

Accepted Solutions

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.

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
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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. 

 

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.

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

Genericus
Moderator
Moderator
   VIP   

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.

 

NetBackup 9.1.0.1 on Solaris 11, writing to Data Domain 9800 7.7.4.0
duplicating via SLP to LTO5 & LTO8 in SL8500 via ACSLS

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

Marianne
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Moderator
Partner    VIP    Accredited Certified
You have not replied to any attempts to help?
You need to work through all of the suggestions above.