Just for the education of the masses....
We have upgraded the drivers to the standard SUN sg drivers with some
fantastic help from Veritas. The first tech from Veritas that I spoke
with gave me the directions to upgrade, which were:
1. Reboot the system with a -r,
2. Rename the file /kernel/drv/sg.conf to sg.conf.old,
3. Run /usr/openv/volmgr/bin/driver/sg.install,
4. Run sgscan to see if the links got created,
5. Reconfigure the drives to use the new driver from the gui and restart
netbackup,
6. Start the gui and run the device configuration wizard.
However, at the end of this, the tapes were unreadable! Yikes!! Problems
with the variable vs. set block size.
Another emergency call to Veritas, and I was put in touch with Valerie
(from Australia. Ask for her by name, she ROCKS!!!!). She did some heavy
research (don't know why the first guy missed this), but she discovered
that Sun patch 108725-7 was created *specifically* for the IBM Ultrium
drives. The patch is actually at a much higher rev now that the ticket
Valerie found, but I installed the latest rev (-16, I think), and bingo
bango, it works perfectly! We are now running with the Sun device
drivers and can now use compression as we should be able to!
And since I had to start from scratch on the devices/drivers, I actually
did the drive reconfig with the "boot -r" which cleaned up the devices
and gave me a chance to switch SCSI ID's on the drives (which were
creating an odd problem of VDC reporting that the system has six drives,
not four). The SCSI ID rework cleared up that problem. I've also noticed
that some backups that were slower before seem to finish quicker now
(because of the compression? Probably...).
Thanks again to Veritas (and Valerie. I'd marry her is I weren't already
married!).
....k
-=-=-=-
> -----Original Message-----
> From: veritas-bu-admin AT mailman.eng.auburn DOT edu
> [mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of
> Kevin Freels
> Sent: Thursday, May 13, 2004 11:46 AM
> To: veritas-bu AT mailman.eng.auburn DOT edu
> Subject: [Veritas-bu] NBU and IBM Ultrium -TD1 drivers (Sun vs. IBM)
>
> Greetings!
>
> We are running Veritas NetBackup on a Sun Ultra-250 connected
> to a ADIC robot with four Ultium-TD1 drives in it. These
> drives were initially and are currently installed with the
> IBM drivers which (as I am told) do not offer the same
> compression rate the SUN/Veritas drivers will. So the
> solution is to un-install the IBM drivers and re-install with
> the native SUN/Veritas drivers. This re-install involves a
> "boot -r" ro recreate the entries under /dev/rmt and then
> deleting and re-adding the drives in NetBackup so that they
> now point to the new devices under /dev/rmt.
>
> However, Veritas Support cannot guarantee that the tapes will
> be readable by the drives with the new drivers. Veritas'
> drivers provide the "sg" part of the drivers which controls
> tape positioning; the read/write functions are controlled by
> the "st" part of the driver and Veritas does not address
> that. They suggested I get Sun and IBM to figure out if tapes
> written by a drive using the IBM drivers will be readable by
> drives now using the Sun drivers.
>
> Without a guarantee that the tapes are readable, we cannot
> obviously make the driver switch.
>
> Any one dealt with this or know the answer?
>
> Thanks!!!!
>
> Kevin Freels
> kfreels AT askjeeves DOT com
> _______________________________________________
> Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
> http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
>
>
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