Date: Sun, 28 Aug 2011 22:06:09 +0200 From: Bengt Ahlgren <bengta@sics.se> To: Kevin Oberman <kob6558@gmail.com> Cc: freebsd-stable@freebsd.org Subject: Re: Unable to shutdown Message-ID: <uh78vqd9u8e.fsf@P142.sics.se> In-Reply-To: <CAN6yY1s3x1ojxh-Dx9Ht=L8M4frohLXcMLNgz%2BzgtBCDodBdsg@mail.gmail.com> (Kevin Oberman's message of "Fri, 26 Aug 2011 21:51:02 -0700") References: <CAN6yY1s3x1ojxh-Dx9Ht=L8M4frohLXcMLNgz%2BzgtBCDodBdsg@mail.gmail.com>
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Kevin Oberman <kob6558@gmail.com> writes: > I've run into an odd problem with dismounting file systems on a > Seagate Expansion portable > USB drive. Running 8-stable on an amd64 system and with two FAT32 > (msdosfs) file systems > on the drive. > > The drive is "green" and spins down when idle. If an attempt is made > to shutdown the > system while the drive is spun down, the system goes through the usual > shutdown including > flushing all buffer out to disk, but when the final disk access to > mark the file systems as > clean, the drive never spins up and the system hangs until it is > powered down. I've found no > way to avoid this other then to remember to access the disk and cause > it to spin up before > shutting down. > > If I attempt to unmount the file systems when the drive is shut down. > the same thing > happens, but I can recover as the second file system is still mounted > and an ls(1) to that file > system will cause the disk to spin up and everything is fine. > > This looks like a bug, but I don't see why the unmounting of an > msdosfs system does not > spin up the drive. It's clearly hanging on some operation that is not > spinning up the drive, > but does block. > > Any ideas what is going on? Possible fix? Not a solution to your problem, but a data point: I have a WD Passport 750GB (2.5") drive with an UFS filesystem on it. I don't think I've tried shutdown with the drive mounted, but I've experienced no problems after the drive has spun down, including umount. There is just a delay while it spins up. This is on 8.2-REL/i386, that is, with the new USB stack. Bengt
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