On Sun, Mar 06, 2011 at 04:14:33PM +0100, Jens A. Griepentrog wrote:
> On 03/06/11 02:25, Matthew Dempsky wrote:
> > [...] Jens A. Griepentrog <griep...@wias-berlin.de> wrote:
> >>What went wrong? The procedure works for usual hard disks and memory
> >>sticks with sectors of 512 bytes. I would be grateful for any hint.
> >>(As a final aim I would like to have some bootable magneto-optical
> >>disk with root partition a: and two more partitions d: and e: ...)
> >
> >When you say "The procedure works for usual hard disks and memory
> >sticks [...]", do you mean it works on this same system when attached
> >to the same ahc(4) controller? E.g., if you replace this sd0 with a
> >standard SCSI disk, will the same set of fdisk/disklabel/newfs
> >commands work correctly?
>
> Thanks, Matthew, I just checked this again with some 16-year old SCSI
> disk to give a rigorous proof of my above statement:
>
> ...
> ahc0 at pci6 dev 2 function 0 vendor "Adaptec",
> unknown product 0x0082 rev 0x02: apic 7 int 21 (irq 3)
> scsibus0 at ahc0: 8 targets, initiator 7
> sd0 at scsibus0 targ 4 lun 0: <QUANTUM, FIREBALL1080S, 1Q09>
> SCSI2 0/direct fixed
> sd0: 1042MB, 512 bytes/sec, 2134305 sec total
> ...
> > a e
> offset: [64]
^^
That was 32 in your earlier example. Did you try some
appropriately-large offsets? (AFAIK, that shouldn't help, but maybe the
first sectors are "magical" or maybe the disk barfs on "unaligned"
access?)
Joachim
