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тАО04-18-2002 07:27 AM
тАО04-18-2002 07:27 AM
Solved! Go to Solution.
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тАО04-18-2002 08:10 AM
тАО04-18-2002 08:10 AM
Re: autochanger driver configuration
mc -p /dev/rac/c4t3d1 -q
if you get something meaningful try:
mc -p /dev/rac/c4t3d1 -r DIMS
to get the contents of the library
HTH
duncan
I am an HPE Employee

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тАО04-18-2002 08:16 AM
тАО04-18-2002 08:16 AM
Re: autochanger driver configuration
ERROR: /dev/rac/c4t3d1: Invalid argument. I just checked the scsi card and it's driver is scsi1. I think that should be spt so I'm going to change that and see what effect it has.
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тАО04-18-2002 08:22 AM
тАО04-18-2002 08:22 AM
SolutionOn HPPB interface (your case) the pass-through interface cannot co-exist with the class drivers.
Thus, if you want to send pass-through commands to the changer, then you must configure the changer to use the spt driver (with the driver
The same is true for the tape drive.
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тАО04-18-2002 10:06 AM
тАО04-18-2002 10:06 AM
Re: autochanger driver configuration
Sandip
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тАО04-18-2002 10:27 AM
тАО04-18-2002 10:27 AM
Re: autochanger driver configuration
You are partially correct.
The schgr driver is the class driver for all libraries other than ones on HPPB I/O cards (those are driven by the autox0 driver).
The schgr driver can accept passhthrough I/O commands simultaneously to changer operations. The autox0 driver cannot (!) do this.
The HPPB I/O interfaces are older and were designed before passthrough I/O was being used for devices, thus it does not have the infrastructure in place to do this. The spt driver was put in place as a special purpose class driver to help with this, allowing passthrough access to HPPB devices. However, since it was added after the fact, and not designed into the driver stack it cannot co-exist with the other driver.
When the newer driver stack was designed (schgr, sdisk, stape, sctl) pass-through was designed into it from the beginning, allowing it to always be executed.
Acutally, if you have a device on a C720 type HBA, you don't even have to use schgr for passhthrough I/O as long as you create the correct device node, as sctl (the pass-through only interface) is defaulted on all unclaimed devices on these interfaces.
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тАО04-18-2002 04:35 PM
тАО04-18-2002 04:35 PM
Re: autochanger driver configuration
You need to configure a special device to use the robotics. Follow the information in the attachment. It will fix the problem. (I hope)
Cheers
~Michael~
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тАО04-18-2002 09:34 PM
тАО04-18-2002 09:34 PM
Re: autochanger driver configuration
If you go by Micheal's advice, it will be ok.
We have gone through this document with our libraries / autochangers for years and they work well.
Rgds
Alexander M. Ermes
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тАО04-22-2002 05:32 AM
тАО04-22-2002 05:32 AM
Re: autochanger driver configuration
Thanks again,
Bob Bonner
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тАО04-22-2002 07:10 AM
тАО04-22-2002 07:10 AM
Re: autochanger driver configuration
What command generates the error? What is the exact syntax of the error? Is there a tape in the drive when you issue the command?
Cheers
Duncan
I am an HPE Employee

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тАО04-22-2002 07:23 AM
тАО04-22-2002 07:23 AM
Re: autochanger driver configuration
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тАО04-22-2002 07:56 AM
тАО04-22-2002 07:56 AM
Re: autochanger driver configuration
From your mc -r command it looks like you already have a tape in the drive, so try the following:
mt -f /dev/rmt/2mn stat
HTH
Duncan
I am an HPE Employee

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тАО04-22-2002 08:01 AM
тАО04-22-2002 08:01 AM
Re: autochanger driver configuration
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тАО04-22-2002 08:06 AM
тАО04-22-2002 08:06 AM
Re: autochanger driver configuration
Use the front panel of the robot to put the tape away, and the load another into the drive... the repeat the mt command.
HTH
Duncan
I am an HPE Employee

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тАО04-22-2002 05:23 PM
тАО04-22-2002 05:23 PM
Re: autochanger driver configuration
A couple of things spring readily to mind
about this problem.
You may wish to disable the potential
SCSI errors that cause tapes to get
stuck in drives. Add to your system kernel
'st_ats_enabled 0'
Disable the EMS monitoring for SCSI tapes.
Attached is a document on how.
If you using Omniback as your backup tool
make sure that you are using a lock for
each logical drive that is created. Also
make sure that the autochanger itself uses
the option to eject tapes back to the slot
if a backup fails, not just abort.
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тАО04-23-2002 06:10 AM
тАО04-23-2002 06:10 AM