On 17/07/2013 17:29, Julian H. Stacey wrote:
Maurizio Vairani wrote:
On 17/07/2013 11:50, Ronald Klop wrote:
On Wed, 17 Jul 2013 10:27:09 +0200, Maurizio Vairani
<maurizio.vair...@cloverinformatica.it> wrote:
Hi all,
on a Compaq Presario laptop I have just installed the latest stable
#uname -a
FreeBSD presario 9.2-PRERELEASE FreeBSD 9.2-PRERELEASE #0: Tue Jul 16
16:32:39 CEST 2013 root@presario:/usr/obj/usr/src/sys/GENERIC amd64
For speed up the compilation I have added to the pool, tank0, a
SanDisk memory stick as cache device with the command:
# zpool add tank0 cache /dev/da0
But when I shutdown the laptop the process will halt with this screen
shot:
http://www.dump-it.fr/freebsd-screen-shot/2f9169f18c7c77e52e873580f9c2d4bf.jpg.html
and I need to press the power button for more than 4 seconds to
switch off the laptop.
The problem is always reproducible.
Does sysctl hw.usb.no_shutdown_wait=1 help?
Ronald.
Thank you Ronald it works !
In /boot/loader.conf added the line
hw.usb.no_shutdown_wait=1
Maurizio
I wonder (from ignorance as I dont use ZFS yet),
if that merely masks the symptom or cures the fault ?
Presumably one should use a ZFS command to disassociate whatever
might have the cache open ? (in case something might need to be
written out from cache, if it was a writeable cache ?)
I too had a USB shutdown problem (non ZFS, now solved)& several people
made useful comments on shutdown scripts etc, so I'm cross referencing:
http://lists.freebsd.org/pipermail/freebsd-mobile/2013-July/012803.html
Cheers,
Julian
Probably it masks the symptom. Andriy Gapon hypothesizes a bug in the
ZFS clean up code:
http://lists.freebsd.org/pipermail/freebsd-fs/2013-July/017857.html
Surely one can use a startup script with the command:
zpool add tank0 cache /dev/da0
and a shutdown script with:
zpool remove tank0 /dev/da0
but this mask the symptom too.
I prefer the Ronald solution because:
- is simpler: it adds only one line (hw.usb.no_shutdown_wait=1) to one
file (/boot/loader.conf).
- is fastest: the zpool add/remove commands take time and
“hw.usb.no_shutdown_wait=1” in /boot/loader.conf speeds up the shutdown
process.
- is cleaner: the zpool add/remove commands pair will fill up the tank0
pool history.
Regards
Maurizio
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