On Wed, Mar 15, 2000 at 10:42:22PM -0600, Sandeep Sundaram wrote:
> Hi Arun,
>
> Yes, there is an ioctl,namely "BLKFLSBUF" which is used by
> hdparm for benchmarking. I had tried out this option also. Though it took
> quite a long time ( about 5 secs ) it still gave me the geometry of the
> disk when the cable was pulled.
I think there is a way to get the geometry using some BIOS calls too. Sorry,
I forget - were you using fdisk ? It might be using the other method when
the disk read failed. Or getting a value cached by the operating system
or the device driver.
> But it also logged an error message in the /var/log/messages file, which
> was something like this:
>
> ::scsi disk I/O error: dev 08:00, sector 0
> ::scsi channel 0: reseting for second half of retries
> ::SCSI bus is being reset for host 0 channel 0
> ::SCSI disk error : host 0 channel 0 id 4 lun 0
> ***return code = 26030000****
> My problem is that I do not know how to interpret these messages and
> especially the return code. Any help in this regard will be helpfull.
dev 08:00 refers to major:minor number of the device. Probably /dev/sdaXX
I don't know how to interpret the return code. If I were you I'd grep
in the driver sources.
-Arun
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