Problems unmounting/fssyncking extern UFS filesystem

Roland Smith rsmith at
Sat Nov 25 08:40:18 PST 2006

On Sat, Nov 25, 2006 at 05:08:03PM +0100, O. Hartmann wrote:
> A while ago since now I receive kernel messages like this in FreeBSD
> 6.2-PRE/AMD64:
> fsync: giving up on dirty
> 0xffffff000362c7c0: tag devfs, type VCHR
>     usecount 1, writecount 0, refcount 325 mountedhere 0xffffff00504d8400
>     flags ()
>     v_object 0xffffff00013c80e0 ref 0 pages 1286
>      lock type devfs: EXCL (count 1) by thread 0xffffff0050287260 (pid
> 14109)
>         dev ufs/BACKUP
> Filesystem is an external USB attached SATA HD, ohci() driven (due to
> ehci() is not working stable and properly on FreeBSD 6.2).

The external USB harddisk I'm using works fine with ehci (VIA VT6202 USB
2.0 controller) on 6.2-PRERELEASE amd64: 

Controller /dev/usb4:
addr 1: high speed, self powered, config 1, EHCI root hub(0x0000), VIA(0x0000), rev 1.00
 port 1 powered
 port 2 addr 2: high speed, power 100 mA, config 1, Mass Storage Device(0x3507), Prolific Technology Inc.(0x067b), rev 1.00

> Filesystem is mounted via amd() and there via the'script' option in
> amd() due to problems of the amd() mounting process recognizing UFS
> filesystems. After 30 seconds of inactivity the filesystems gets
> dismounted. This worked quite well in the past, but now I see this
> kernel error messages.

The only problems I ever had wer with the firewire interface, not
USB. But I don't use amd, and I'm using GEOM_ELI encyption.

If amd doesn't work well with ufs, would using glabel be a workaround?

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