[9fans] mbr: writing MBR: i/o error

[9fans] mbr: writing MBR: i/o error

[Matthias Teege]

Moin,

i'm waiting for my new server hardware and in the meantime I'm playing
with a fossil setup in vmware. There are two virtual disks (/dev/sdC0,
/dev/sdD0) in the virtual machine and I've setup a standard fossil
plan 9 from ISO image. The setup of the first setup looks like this:

9fat                  0 204800     (204800 sectors, 100.00 MB)
nvram            204800 204801     (1 sectors, 512 B )
swap             204801 409601     (204800 sectors, 100.00 MB)
fossil           409601 2506753    (2097152 sectors, 1.00 GB)
isect           2506753 3121153    (614400 sectors, 300.00 MB)
arenas          3121153 8385867    (5264714 sectors, 2.51 GB)

Venti isn't initialized yet. Now I try to prepare the second disk. I
try to mirror fossil and venti on the second disk. First I try to run
disk/mbr -m /386/mbr /dev/sdD0/data. It gives me mbr: writing MBR: i/o
error. What do I missing? Is it necessary to setup the second disk
exactly like the first one?

Thanks,
Matthias

Re: [9fans] mbr: writing MBR: i/o error

[Steve Simon]

Have you prep'ed the seccond disk?

disk/fdisk tweeks the MSDOS partition table, allowing you to make a plan9 slice
disk/prep	tweeks the plan9 partition table inside the plan9 slice.

look at the contents of 
	cat /dev/sd[CD]0/ctl
which is filled in with the partitions as configured by disk/prep.

-Steve

Re: [9fans] mbr: writing MBR: i/o error

[Matthias Teege]

On Thu, 30 Sep 2004 18:09:53 +0100, Steve Simon <steve@quintile.net> wrote:
> Have you prep'ed the seccond disk?

I'm so stupid, I try to write an mbr to the cdrom instead of the disk.
The second disk
ist /dev/sdC1.

> look at the contents of
>         cat /dev/sd[CD]0/ctl

Yes, this helps ;-)

Many thanks
Matthias