As Michael G. Schabert wrote ...

> Hi all,
> Wilko suggested that I try reformatting the HD to see if it could be fixed
> by just updating the grown defects list...I didn't know how to do this
> under NetBSD (is there a way?). I attached the drive to my Mac to use FWB's
> hard disk toolkit to do a media scan...my Mac wouldn't even boot with the
> drive attached...it gave the sad mac (if any of you use Macs, you'll
> understand). So, I'm kinda thinking that it may be something wrong with the
> SCSI electronics onboard te drive. At any rate, I threw that drive aside &
> stuck a Seagate Wren9 drive in (on?) my Alpha. I booted with the floppy &
> re-untarred a recent base.tgz onto the /mnt to correct the corruption probs
> from the earlier drive. I also went through the disklabel & newfs on the
> wren. When booting, the dmesg gave:
> 
> scsibus0 at ncr0: 8 targets, 8 luns per target
> sd0 at scsibus0 targ 2 lun 0: <QUANTUM, FIREBALL1080S, 1Q08> SCSI2 0/direct
> fixed
> sd0(ncr0:2:0): 10.0 MB/s (100 ns, offset 8)
> sd0: 1042MB, 3835 cyl, 4 head, 139 sec, 512 bytes/sect x 2134305 sectors
> probe(ncr0:4:0):  Check Condition on CDB: 0x00 00 00 00 00 00
>     SENSE KEY:  Media Error
>      ASC/ASCQ:  Medium Format Corrupted

Yikes. I've seen this happen after a drive was powered down *during*
a SCSI format. Fortunately a repeated format which ran to completion
unhindered by people removing power resurrected the drive again.

Groeten / Cheers,
Wilko
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