Backup recovery from magnetic tape

[MichelleP_1]

Following up on Guenther's suggestion that it's FC connectivity...
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Are all of the paths reachable? You hope NOT to see "not responding" on any paths.
$ PIPE SHOW DEV/FULL MGA | SEARCH SYS$PIPE MG,PATH
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Try SCSI_INFO:
$ scsi :== $sys$etc:scsi_info.exe
$ scsi $1$mga1
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Check the port statuses in SDA:
$ show dev fg
$ anal/sys
SDA> fc set dev FGA0
SDA> fc name

Look for port(s) beginning with 5005, you hope to see "VALID" state, not "PAUSED" state.

Repeat SDA commands for each FG device.
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If your tape drives/libraries are DLT IV and connected to FC through an MDR*...
To cycle power on the tape drives and MDR:
1. Power off tape drive(s) and MDR
2. Power on tape drive(s)
3. Wait until tape drive(s) are completely up and ready
4. Power on MDR

*My experience is with DLT IV tape libraries and an MDR. These are older technologies. I'm not sure if it's the same process for newer tape drives/libraries.
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Sorry I can't give you actual examples. I don't currently have any MGA devices, but in the six years I was at a site that did, I can't tell you how many times I had to go through these processes.

Regards,
Michelle

[Jan van den Ende]

Michelle,

>>>
but in the six years I was at a site that did, I can't tell you how many times I had to go through these processes.
<<<

I definitely share such memories!

I just do not recall the exact message...
Guess I just pushed those ugly memories out of my working set :-)

Proost.

Have one on me.

jpe

[GuentherF]

Ketan,

not quite:

"1) The tape is already mounted by another process." -> Error is DEVALLOC

"2) The tape is not loaded in the drive" ->
Error is MEDOFL

"3) The tape drive is offline" - As far as I can remember there is no VMS OFFLINE state for a tape drive - like for some pseudo devices which would return DEVOFFLINE.

/Guenther