kernel panic on SATA drive

Alex codam at
Mon Dec 21 20:54:52 UTC 2009

Dear John,

Any progress for bellow?

I have the same problem with PCI SATA Controller ST-Lab A-173 Sil3512
It's not RAID, but when copying to HDD:
ad6:FAILURE - device detached
g_vfs_done():ad6s1f[WRITE(offset=38007275520, length=131072)]error = 6
/usr: got error 6 while accessing filesystem
panic: softdep_deallocate_dependencies: unrecovered I/O error
cpuid = 0
Uptime: 2m18s
Physical memory: 243 MB
Dumping 58 MB:unknown: timeout waiting to issue command
unknown: error issuing WRITE_DMA command

Automatic reboot in 15 seconds - press any key on the console to abort
-----------END LOG-------------


> I've been having an intermittent problem, wonder if someone on the
> list has any ideas.

> First my setup:
> FreeBSD 7.2-RELEASE (amd64)
> quad-core Phenom processor
> mobo: MSI K9N2G Neo
> chipset: NVIDIA GeForce 8200, which FreeBSD recognizes as nForce (not
> sure how that works)

> I have a 3ware RAID card (RAID 1), which is the boot device.
> A seagate drive connected via SATA
> A WD external drive via USB

> I will have the system running fine, then the seagate will apparently
> fall off the bus, resulting in a panic.
> The dump fails as well, presumably due to the 3ware driver not being
> able to handle the panic? not sure...
> If anyone knows a way I can get the dump to succeed, I'd appreciate
> that info, too.
> See below output for details.

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