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Tape Drives show Missing Paths

dagren
Level 3

Some of my tape drives are showing missing paths after a migration from one Fiber switch to another. I have validated that the zones are setup the same on the networking side (and even see the drives checked in, in the fiber database on the switches), I tried a solution from a previous post on one of the drives with the missing path(removing the drive and running tpautoconfig -a), but am not actually seeing the drive show back up after running tpautoconfig -a. Any assistance would be very helpful.  

12 REPLIES 12

mph999
Level 6
Employee Accredited

Does the operating system see the drives , eg device manager

 

It does not see all of them. I tried rescanning the hardware, but no avail.

Alexis_Jeldrez
Level 6
Partner    VIP    Accredited Certified

This should be obvious but software can't work with resources unavailable to the host operating system. You need to see the tape drives from Windows device manager before configuring them with NetBackup.

If some tape drives are missing then confirm the tape drives are online, check the cables, check again the SAN switches are configured properly and update the HBA drivers and the tape firmware if required/recommended. If some tape drives are working and others are not, try exchanging their cables to confirm if the problem is with the drives, cables or switch port.

mph999
Level 6
Employee Accredited

Depending on the make of the HBA (qlogic or emulex as a guess ...) there should be an HBA utility you can nstall (either SanSufer or HBAnywhere for the two brands I mention).  This allows you to look 'down the fibre' and see whats is (or is not) connected/ visible.

I'd start there ...

At the moment, nothing to do with NBU, and nothing in NBU is going to fix it.

Given you have moved switches, seems like you need to buy your SAN team some cakes ...

So the OS now sees the tape drives, but they are still showing "MISSING_PATH" under the device monitor. I have tried running the config wizard from the GUI and tried running the tpautoconfig -a from the master/media servers. 

Marianne
Moderator
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Please run 'scan' from cmd (....\veritas\volmgr\bin) to see if the devices respond to scsi_commands and to verify OS paths.

If you see all devices in scan output, delete everything that shows missing_path, then run device config wizard.

Deleting the drives and running the wizard did not bring back the drives. Now the drives are missing...

Marianne
Moderator
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Please show us output of 'scan'.

 

C:\Program Files\Veritas\Volmgr\bin>scan
************************************************************
*********************** SDT_TAPE ************************
*********************** SDT_CHANGER ************************
************************************************************
------------------------------------------------------------
Device Name : "Tape3"
Passthru Name: "Tape3"
Volume Header: ""
Port: 3; Bus: 0; Target: 16; LUN: 0
Inquiry : "HP Ultrium 5-SCSI I6PZ"
Vendor ID : "HP "
Product ID : "Ultrium 5-SCSI "
Product Rev: "I6PZ"
Serial Number: "F0A1785090"
WWN : ""
WWN Id Type : 0
Device Identifier: ""
Device Type : SDT_TAPE
NetBackup Drive Type: 10
Removable : Yes
Device Supports: SCSI-6
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "Changer0"
Passthru Name: "Changer0"
Volume Header: ""
Port: 3; Bus: 0; Target: 17; LUN: 1
Inquiry : "ADIC Scalar i500 670G"
Vendor ID : "ADIC "
Product ID : "Scalar i500 "
Product Rev: "670G"
Serial Number: "ADICA0C0090914_LLA"
WWN : ""
WWN Id Type : 0
Device Identifier: "ADIC A0C0090914_LLA "
Device Type : SDT_CHANGER
NetBackup Robot Type: 8
Removable : Yes
Device Supports: SCSI-3
Number of Drives : 10
Number of Slots : 193
Number of Media Access Ports: 30
Drive 1 Serial Number : "F0A17850A0"
Drive 2 Serial Number : "F0A17850A4"
Drive 3 Serial Number : "F0A17850A8"
Drive 4 Serial Number : "F0A17850AC"
Drive 5 Serial Number : "F0A1785090"
Drive 6 Serial Number : "F0A1785094"
Drive 7 Serial Number : "F0A1785098"
Drive 8 Serial Number : "F0A178509C"
Drive 9 Serial Number : "F0A1785000"
Drive 10 Serial Number : "F0A1785004"
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "Tape5"
Passthru Name: "Tape5"
Volume Header: ""
Port: 5; Bus: 0; Target: 26; LUN: 0
Inquiry : "HP Ultrium 5-SCSI I6PZ"
Vendor ID : "HP "
Product ID : "Ultrium 5-SCSI "
Product Rev: "I6PZ"
Serial Number: "F0A1785004"
WWN : ""
WWN Id Type : 0
Device Identifier: ""
Device Type : SDT_TAPE
NetBackup Drive Type: 10
Removable : Yes
Device Supports: SCSI-6
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "Tape6"
Passthru Name: "Tape6"
Volume Header: ""
Port: 5; Bus: 0; Target: 27; LUN: 0
Inquiry : "HP Ultrium 5-SCSI I6PZ"
Vendor ID : "HP "
Product ID : "Ultrium 5-SCSI "
Product Rev: "I6PZ"
Serial Number: "F0A1785094"
WWN : ""
WWN Id Type : 0
Device Identifier: ""
Device Type : SDT_TAPE
NetBackup Drive Type: 10
Removable : Yes
Device Supports: SCSI-6
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "Tape7"
Passthru Name: "Tape7"
Volume Header: ""
Port: 5; Bus: 0; Target: 28; LUN: 0
Inquiry : "HP Ultrium 5-SCSI I6PZ"
Vendor ID : "HP "
Product ID : "Ultrium 5-SCSI "
Product Rev: "I6PZ"
Serial Number: "F0A17850AC"
WWN : ""
WWN Id Type : 0
Device Identifier: ""
Device Type : SDT_TAPE
NetBackup Drive Type: 10
Removable : Yes
Device Supports: SCSI-6
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "Tape8"
Passthru Name: "Tape8"
Volume Header: ""
Port: 5; Bus: 0; Target: 29; LUN: 0
Inquiry : "HP Ultrium 5-SCSI I6PZ"
Vendor ID : "HP "
Product ID : "Ultrium 5-SCSI "
Product Rev: "I6PZ"
Serial Number: "F0A1785090"
WWN : ""
WWN Id Type : 0
Device Identifier: ""
Device Type : SDT_TAPE
NetBackup Drive Type: 10
Removable : Yes
Device Supports: SCSI-6
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "Tape9"
Passthru Name: "Tape9"
Volume Header: ""
Port: 5; Bus: 0; Target: 30; LUN: 0
Inquiry : "HP Ultrium 5-SCSI I6PZ"
Vendor ID : "HP "
Product ID : "Ultrium 5-SCSI "
Product Rev: "I6PZ"
Serial Number: "F0A1785000"
WWN : ""
WWN Id Type : 0
Device Identifier: ""
Device Type : SDT_TAPE
NetBackup Drive Type: 10
Removable : Yes
Device Supports: SCSI-6
Flags : 0x0
Reason: 0x0
------------------------------------------------------------
Device Name : "Changer1"
Passthru Name: "Changer1"
Volume Header: ""
Port: 5; Bus: 0; Target: 30; LUN: 1
Inquiry : "ADIC Scalar i500 670G"
Vendor ID : "ADIC "
Product ID : "Scalar i500 "
Product Rev: "670G"
Serial Number: "ADICA0C0090914_LLA"
WWN : ""
WWN Id Type : 0
Device Identifier: "ADIC A0C0090914_LLA "
Device Type : SDT_CHANGER
NetBackup Robot Type: 8
Removable : Yes
Device Supports: SCSI-3
Number of Drives : 10
Number of Slots : 193
Number of Media Access Ports: 30
Drive 1 Serial Number : "F0A17850A0"
Drive 2 Serial Number : "F0A17850A4"
Drive 3 Serial Number : "F0A17850A8"
Drive 4 Serial Number : "F0A17850AC"
Drive 5 Serial Number : "F0A1785090"
Drive 6 Serial Number : "F0A1785094"
Drive 7 Serial Number : "F0A1785098"
Drive 8 Serial Number : "F0A178509C"
Drive 9 Serial Number : "F0A1785000"
Drive 10 Serial Number : "F0A1785004"
Flags : 0x0
Reason: 0x0

C:\Program Files\Veritas\Volmgr\bin>

Marianne
Moderator
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Does tpconfig -l show all drives as missing after running device config wizard?

I have matched the drives to their position numbers in the robot.
Scan shows that there are 2 paths to drive position 5. (Port 3 an 5)
4 more tape drives on port 5:
Position 4, 6, 9, and 10
And 2 paths to the robot on port 3 and 5.

If you are expecting to see all 10 drives, then there is still an issue with physical connections and/or zoning.

andrew_mcc1
Level 6
   VIP   

Also you will have likely done this; but just in case - have you refreshed the Admin Console display? It can be slow in reflecting some changes by itself, including for tape drives and robots. BR Andrew

I wrote in the wrong thread my message may be deleted