Strange problem with Panasonic DVD RW drive
itetcu at people.tecnik93.com
Thu Feb 23 04:32:49 PST 2006
On Thu, 23 Feb 2006 20:15:31 +0800
Geoff Glasson <g_glasson at jimali.dyndns.org> wrote:
> I'm having a really strange problem with my DVD drive in my Athlon64
> X2 box, in that I'm unable to mount a CDROM because the machine
> thinks there is a hardware error. The strange thing is, that this
> failure is dependent upon the mode in which I boot the machine.
> For example, if I boot my machine with the CD in the drive, the
> machine reads the disc and boots quite happily from the CD. If I
> boot the machine without the CD into safe mode, I'm able to manually
> mount the CD and read it, however if I boot my machine normally I
> cannot mount the CD and mount reports the following error
> "mount_cd9660: /dev/acd0: Input/output error".
> dmesg reports :
> "Trying to mount root from ufs:/dev/ad12s1a
> acd0: FAILURE - READ_BIG HARDWARE ERROR asc=0x08 ascq=0x03 error=0
> g_vfs_done():acd0[READ(offset=32768, length=2048)]error = 5"
> In all cases, the same FreeBSD AMD RC1 boot disc is used, so I know
> the disc is OK.
> Has anyone else seen this type of problem? Any ideas how to resolve
> it? Is there any difference between the default boot mode and safe
> mode that is likely to cause this problem?
In safe mode you have hw.ata.atapi_dma=0. Try setting it to 0 at loader
prompt and boot -v and see if you can mount the CD. Try changing the
What MB/chip-set ?
IOnut - Unregistered ;) FreeBSD "user"
"Intellectual Property" is nowhere near as valuable as "Intellect"
Ferengi Rule of Acquisition #189:
Let others keep their reputation. You keep their latinum.
-- ST: Legends of the Ferengi
More information about the freebsd-amd64