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Drives disappeared in NetBackup

I'm running Solaris 11 and NetBackup 7.7.2 and have recently had my robots and drives stop working.  When i go to "UP" the drives they appear to come up and then immediately fail.  The drives themselves are Storagetek SL150s and they are not showing any errors and are at 3.74 firmware version. On the servers, when i run the scan command this is the output on both systems:  ****************SDT_TAPE*************************

      ********************************SDT_CHANGER********************

and no devices are displayed.  I ran tpautoconf -a and got no feedback.  When I opened the GUI and tried to reconfigure the storage devices it founf the robot and tape drive but I still can't bring them UP in the gui.  

Due to the nature of the servers I can't upload logs.

Thanks

 

11 Replies

Re: Drives disappeared in NetBackup

You must likely have a problem between the OS and the devices, not NetBackup.

scan / tpautoconf only send the scsi inquiry command, and displays the response sent from the drive/ robot.

Solaris can be a bit of a pain with the sg driver, but if nothing has changed, this shouldn’t be an issue.

Can you see the devices from the OS ?

cfgadm -al -o show_FCP_dev I think ...

Re: Drives disappeared in NetBackup

sgscan and scan commands perform a scan at OS-level.

It seems that the OS lost connectivity to the devices.
We often say this:
NBU has no direct connectivity to devices. It relies on the OS for access to devices.

Please check /var/adm/messages file for hardware errors.
(If this happened more than 3 days ago, look at messages.*)
If ALL devices disappeared, my suspicion will be with the HBA.

Re: Drives disappeared in NetBackup

Here is a TN showing how scan works (tpautoconf -t is pretty much the same, just that the output is formatted differently)

https://isearch.veritas.com/internal-search/en_US/article.100047749.html

It shows that when you run scan, the scsi commands received by the library look like this:

Sep 22 04:30:48 vtl-v3 vtllibrary[1568]: CDB (225) (delay 120405): 12 00 00 00 60 00
Sep 22 04:30:48 vtl-v3 vtllibrary[1568]: CDB (226) (delay 805): 12 01 80 00 84 00
Sep 22 04:30:48 vtl-v3 vtllibrary[1568]: CDB (227) (delay 2405): 12 01 83 00 84 00
<snip>

... this is all it does - CDB 0x12 is just scsi inquiry

The numbers after the '12' are just slight variations on what is being queried, for example '12 01 80 00 84 00' would return the serial number of the drive.

You could run these same commands from another utility (sgscan as Marianne mentioned) and you would get teh same issue - no output.

Re: Drives disappeared in NetBackup

I'm seeing the following error repeated on both the media and master servers:

ID702911 daemon error TLD(1) unavailable initizalition failed, unable to open robotic path

daemon error, robotic path /dev/sg/c0tw5xxxxx does not exist

Re: Drives disappeared in NetBackup

Can you try robtest? If it's successful that means you can access robot from your Netbackup server, if not you may have to check if there is change on your sever hba or zoning or logon to your Tape Library web console and check robot is moving and functioning correctly.

Re: Drives disappeared in NetBackup

@goose325 

Please show us output of this command as per @mph999 's request:

cfgadm -al -o show_FCP_dev

This error:
robotic path /dev/sg/c0tw5xxxxx does not exist
... means one of 2 things:
1. The OS has lost connectivity to the device. You need to check physical connections and switch logs.
2. The device path has changed due to lack of persistent binding.

Running OS command 'cfgadm' will show you what the OS sees.

Re: Drives disappeared in NetBackup

I doubt robtest will work. as it's complaining about the path to the robot.
robtest is 'almost' independent of NetBackup - but it does use the 'robot config' so it knows the path the robot(s).

Re: Drives disappeared in NetBackup

Output of cfgadm command on server that's not seeing tape drives:

AP_Id             Type             receptacle          occupant

c7                    FC                Connected          unconfigured

C8                   FC                 Connected          unconfigured

C14                FC                   Connected          unconfigured

 

Good server:

C12                 FC-private        Connected          configured

C12::500104fxxxx  tape           connected           configured

C12::5000104fxxxx med-changer   connected     configured

C13                 FC                      connected           unconfigured    

 

Re: Drives disappeared in NetBackup

@goose325 

I hope you have noticed the problem?
That all controllers show 'unconfigured' status?

You can reconfigure with cfgadm command:
cfgadm -c configure c7
(Repeat for all controllers)

followed by rebuilding device tree:
devfsadm -Cv

But best to get your OS team to investigate the cause as this might happen again.

Once devices are see again at OS-level, you will probably need to rebuild the NBU sg driver as well:

cd /usr/openv/volmgr/bin/driver
/usr/openv/volmgr/bin/sg.build all

- Install the new sg driver configuration:

/usr/bin/rm -f /kernel/drv/sg.conf
/usr/openv/volmgr/bin/driver/sg.install

- Check/verify config:
/usr/openv/volmgr/bin/sgscan

If device paths have changed, you will need to re-do NBU device config.

Re: Drives disappeared in NetBackup

U followed your directions and ran these commands to configure the controllers but the results are the same when I ran the command:  cfgadm -al -o show_FCP_dev

 You can reconfigure with cfgadm command:
cfgadm -c configure c7
(Repeat for all controllers)

followed by rebuilding device tree:
devfsadm -Cv

Re: Drives disappeared in NetBackup

@goose325 

You certainly have a problem between the OS and the device paths.

There is nothing to be done from NBU side.

As long as devices are not seen at OS-level, NBU cannot use them.

You need to check physical connections, switch logs, hba logs and/or errors in messages file.
Get OS and hardware support involved.