On 03/06/11 02:25, Matthew Dempsky wrote:
On Sat, Mar 5, 2011 at 7:20 AM, 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
...
Here, the same set of commands works successfully:
# fdisk sd0
Disk: sd0 geometry: 132/255/63 [2134305 Sectors]
Offset: 0 Signature: 0xAA55
Starting Ending LBA Info:
#: id C H S - C H S [ start: size ]
-------------------------------------------------------------------------------
0: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
1: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
2: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
3: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
# fdisk -i sd0
Do you wish to write new MBR and partition table? [n] y
Writing MBR at offset 0.
# fdisk sd0
Disk: sd0 geometry: 132/255/63 [2134305 Sectors]
Offset: 0 Signature: 0xAA55
Starting Ending LBA Info:
#: id C H S - C H S [ start: size ]
-------------------------------------------------------------------------------
0: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
1: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
2: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
*3: A6 0 1 2 - 131 254 63 [ 64: 2120516 ] OpenBSD
# disklabel -E sd0
Label editor (enter '?' for help at any prompt)
> p
OpenBSD area: 64-2120580; size: 2120516; free: 2120516
# size offset fstype [fsize bsize cpg]
c: 2134305 0 unused
> a e
offset: [64]
size: [2120516]
FS type: [4.2BSD]
> w
> q
No label changes.
# disklabel sd0
# /dev/rsd0c:
type: SCSI
disk: SCSI disk
label: FIREBALL1080S
uid: 6e33f59301aa59ca
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 255
sectors/cylinder: 16065
cylinders: 132
total sectors: 2134305
boundstart: 64
boundend: 2120580
drivedata: 0
16 partitions:
# size offset fstype [fsize bsize cpg]
c: 2134305 0 unused
e: 2120512 64 4.2BSD 2048 16384 1
# newfs /dev/rsd0e
/dev/rsd0e: 1035.4MB in 2120512 sectors of 512 bytes
6 cylinder groups of 202.47MB, 12958 blocks, 25984 inodes each
super-block backups (for fsck -b #) at:
32, 414688, 829344, 1244000, 1658656, 2073312,
# mount /dev/sd0e /mnt
# mount
/dev/sd1a on / type ffs (local)
/dev/sd1d on /home type ffs (local, nodev, nosuid, softdep)
mfs:12008 on /tmp type mfs (asynchronous, local, nodev, nosuid,
size=2097152 512-blocks)
/dev/sd2d on /usr type ffs (local, nodev, softdep)
/dev/sd2e on /var type ffs (local, nodev, nosuid, softdep)
/dev/sd0e on /mnt type ffs (local)
# umount /mnt
By the way, I also tried to add the sector-size option "-S 2048"
to the newfs command on the MO disk but without any success.
Jens
