On 18 Jan 2005, at 02:28, John Anthony Grigutis wrote:
On Jan 17, 2005, at 12:17 PM, Geoff Lee wrote:
I have a lab of 30 machines which all work perfectly except when one
tries to mount a USB pen drive. Sometimes it will work fine and mount
and other times it will not. When the drive fails to mount, it
appears in system profiler but not in Disk Utility; basically the
machine knows there's a USB device there but doesn't see that it's a
storage device. Re-starting the machine will usually cause the drive
to mount OK a few times but the problem comes back fairly swiftly.
Have you upgraded to 10.3.7 recently?
Yup.
If so, you might have run into the same problem I had. Check your
/private/var/log/system.log when you plug in a USB flash drive. You
might see an entry like this:
kextd[84]: a different version of dependency extension
/System/Library/Extensions/IOSCSIArchitectureModelFamily.kext is
already loaded
Hmm... this entry does indeed appear!
/usr/sbin/kextstat showed that version 1.3.7 was loaded, but version
1.3.8 was what was in /System/Library/Extensions/ (via System
Profiler).
The problem … caches. The system was using a cached version of that
extension instead of reloading the new version.
We use radmind to push out updates to all our machines. Normally,
radmind (/private/etc/hook/radmind.hook) deletes
/System/Library/Extensions.kextcache &
/System/Library/Extensions.mkext if it sees newer extensions, but
apparently it wasn't enough this time.
I also use radmind and had suspected it could be something of this
nature. My radmind script merely touches /System/Library/Extensions
(ostensibly causing the cache to be re-built on re-boot) but as you say
this doesn't seem to have been sufficient.
Me thinks this also might explain some other reports I've seen
regarding 10.3.7 and FireWire hard drive problems.
Probably... there are three IOSCSI related plugins that load with
incorrect versions (4 on one of my machines). I imagine this throws the
whole subsystem somewhat.
Deleting the caches you suggest on a couple of machines does seem to
have fixed the problem. I'm going to investigate a bit further and see
if I can find out why the usual method of touching /S/L/Extensions was
ineffective. I'll report back to the list with my findings.
It's great when someone else has the exact same problem (and even
better when they've found the solution!)
Thanks a bunch,
-geoff
______________________________________
Geoff Lee <email@hidden>
Computing Support, Architecture
School of Arts, Culture and Environment
University of Edinburgh
20 Chambers St,
Edinburgh, Scotland,
EH1 1JZ
Tel: +44 (0)131 650 8020
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