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тАО12-06-2010 10:29 PM
тАО12-06-2010 10:29 PM
Re: Backup recovery from magnetic tape
Following up on Guenther's suggestion that it's FC connectivity...
-------
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
--------
Try SCSI_INFO:
$ scsi :== $sys$etc:scsi_info.exe
$ scsi $1$mga1
--------
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.
--------
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.
------
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
-------
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
--------
Try SCSI_INFO:
$ scsi :== $sys$etc:scsi_info.exe
$ scsi $1$mga1
--------
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.
--------
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.
------
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
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тАО12-07-2010 12:28 AM
тАО12-07-2010 12:28 AM
Re: Backup recovery from magnetic tape
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
>>>
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
Don't rust yours pelled jacker to fine doll missed aches.
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тАО12-07-2010 09:07 AM
тАО12-07-2010 09:07 AM
Re: Backup recovery from magnetic tape
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
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
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