Hello,
On 1/17/2006 7:35 PM, Alan Brown wrote:
This may sound a bit strange for anyone not running redundantly connected
FO SAN systems.
Given SAN topology changes (new hardware. hardware removed, or
connection paths changed), the scsi generic device for the library robot
has changed around 6 times in the last 8 reboots....
Very funny indeed...
I've hacked up a very rough'n'ready shell script to find and link the
right sg* to /dev/changer at reboot, but I'm wondering if anyone's
already implemented something slicker, or managed to do it inside Linux
Device Mapper.
Unfortunately, not. But have you looked into the /sys file system on
your backup machine? I assume that, given the highly dynamic nature of
SAN infrastructure, the relevant drivers might create useful nodes there.
Other than that - HAL, perhaps. I never got around looking at that
stuff, but as far as I know it should be just the tool to create the
proper device nodes and permissions based on all sorts of stuff like
device names, serial numbers, and the like. I guess it's mainly been
developed for USB and modern stuff like that, but after all, SCSI
devices (and your SAN equipment falls into this category, after all)
have all the necessary information to allow to identify each unique device.
There was one discussion recently which touched on that subject - look
for Barry L Bond, Question on automounting USB hard drives to specific
directories.
Good luck, and keep us informed, ok?
Arno
AB
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