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/boot RAID1

DISCUSSION Ninti Systems 2 participants 2 messages Mar 31, 2004 MD RAID

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I've set up everything to switch my fresh Slackware 9.1 install on /dev/hda over to RAID1 devices set up on /dev/hda (currently 'missing') and /dev/hdc.

Before I switch, I need to check one thing which isn't clear to me from the Software RAID HowTo:

I currently have a separate partition (/dev/hda1) for /boot. Can this partition also be switched over to RAID1 (on /dev/md1) or must the /boot partition always be on a non-RAID device?

RAID1 support appears to compiled into the Slackware bare.i kernel I am using. Autodetection on boot is working.

Thanks
Mick

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Quoted 10 lines · Ninti Systems

I've set up everything to switch my fresh Slackware 9.1 install on /dev/hda over to RAID1 devices set up on /dev/hda (currently 'missing') and /dev/hdc.

Before I switch, I need to check one thing which isn't clear to me from the Software RAID HowTo:

I currently have a separate partition (/dev/hda1) for /boot. Can this partition also be switched over to RAID1 (on /dev/md1) or must the /boot partition always be on a non-RAID device?

It can be RAID1, yes, with some limits. Specifically, it can be RAID1 because each disk in a RAID1 looks like a stand-alone disk if your bootloader is unaware of the "RAID" nature of it.

So, old versions of lilo, and grub, can boot off the component of the RAID1 just fine. RAID5, though, would stump them.

Modern versions of lilo have some in-built support for RAID1, I hear, though I have not used that support myself.

Daniel

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