[clug] Mirroring boot disk on Debian

[Alastair D'Silva]

One trick I do under FreeBSD is as follows:

1. Boot from CD
2. Create software mirror on hdds
3. Query the RAID software (Vinum in my case) about the offset of the
underlying subdisks
4. Create a real partition of the appropriate size in the partition
table, with the offset set to the value returned from (3), and mark it
bootable
5. Perform an install onto the software RAID mirror
6. Reboot (and cross your fingers)

I'm sure something similar can be achieved under Linux.

-- 
Alastair D'Silva           mob: 0413 485 733
Networking Consultant      fax: 0413 181 661
New Millennium Networking  web: http://www.newmillennium.net.au


> -----Original Message-----
> From: linux-bounces+clug=d-silva.org at lists.samba.org 
> [mailto:linux-bounces+clug=d-silva.org at lists.samba.org] On 
> Behalf Of Stephen Jenkin
> Sent: Wednesday, 17 November 2004 2:01 PM
> To: Canberra Linux User Group
> Subject: [clug] Mirroring boot disk on Debian
> 
> 
> Anyone done this or can give me pointers??
> 
> I've had two goes & am not happy with the result...
> 
> Debian (sarge/testing) has install options of LVM or Neil 
> Brown's MDADM [multi-disk.  Not quite mirroring...] Debian 
> doesn't support booting from either. [or so it says]
> 
> The sarge-installer's version of LVM concatenated the disks, 
> [raid 0], did not seem to offer me raid 1 :-(
> 
> Found a package 'raidtools2' & read the doco - gives two 
> methods of creating bootable mirrored disk.  Is this "the one 
> true way"?? [apologies in advance, not meant to offend, just 
> my humour]
> 
> TIA
> steve
> 
> Steve Jenkin, Unix Sys Admin
> 0412 786 915 (+61 412 786 915)
> PO Box 48, Kippax ACT 2615, AUSTRALIA
> 
> sjenkin at canb.auug.org.au http://www.tip.net.au/~sjenkin
> 
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