Thanks Robert. I'm now able to boot from the boot partition of the
second drive.
Here are the findings of my testing.
- DISABLE power to SCSIID 0 of mirrored volume /dev/md0
md0 : active raid1 sda2[1] 5895744 blocks [2/1] [_U]
-Shutdown system , DISABLE power to SCSI ID 1 and ENABLE power to SCSIID 0
md0 : active raid1 sda2[0] 5895744 blocks [2/1] [U_]
-Shutdown system, enable power to drives and do raidhotadd to bring volume
back to mirrored state.
One question, where do you find out that sdb is supposed to be bios=0x80
what about sda ? is there a table somewhere I could see that info for
myself?
On Mon, 15 Nov 1999, Robert Dahlem wrote:
> Luis,
>
> On Mon, 15 Nov 1999 12:49:07 -0500 (EST), Luis Costabile wrote:
>
> >Hello, I installed root as a mirrored volume. I have two SCSI disks only
> >in the system. According to the HOWTO it's suggested to have /boot reside
> >on a separate partition on each disk. I installed the kernels and other
> >stuff normally on /boot to these partitions then one at a time ran lilo
> >against them. When I run lilo to the /boot partition on the first drive
> >everything is OK, when I do the same to the other drive I get a warning
> >that I'm installing lilo to the second disk drive but as far as I can see,
> >LILO is installed anyway.
> >
> >Now, when I try and boot , everything is fine, system comes up etc, but
> >when I disable the first drive and try to boot from the second drive I get
> >that LILILILILIL and bunch of other lilo stuff, none of which makes sense
> >to me.
>
> Create a second boot partition on the second drive and mount it as /boot2.
>
> Now copy all files from /boot to /boot2.
>
> After this create a second lilo configuration file (i.e. /etc/lilo.conf.backup)
>
> boot=/dev/sdb
> disk=/dev/sdb bios=0x80
> map=/boot2/map
> install=/boot2/boot.b
>
> image=/boot2/vmlinuz
> root=/dev/md0
> label=linux
>
> Now run 'lilo -C /etc/lilo.conf.backup'. This one will probably boot as /dev/sda
>from the
> former /dev/sdb when you remove /dev/sda (indeed I tested this an EIDE configuration
>with
> /dev/hda and /dev/hdc, not with SCSI). Please remark, that it will come up as
>/dev/sda!!!
>
> You will have to make sure that in case of loss of any of your disks your system
>will
> come up with some reasonable disk names: Lets assume you have /dev/sda, sdb, sdc and
>sdd
> forming a RAID-1 /dev/md0 consisting of /dev/sdb and /dev/sdd. You will be out of
>the
> game whenever you loose sda or sdb ...
>
> Regards,
> Robert
>
>
>
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