On 11/27/2009 04:27 PM, Justin Piszcz wrote:

Hi Neil,

A couple of things, recently I tried to make a new system
(MDADM/latest/SW RAID1) and noticed that GRUB & LILO still only support
0.90 superblocks. This leads me to my next question.

Will the newer superblocks be supported? I ask this due to my final
question.

Not by grub or lilo, which are both dead projects.  However, grub2 does
support newer superblocks and we actually ship it in F12.

With 0.90 superblocks, I have never seen any array (raid1,raid5,raid6)
try to correct a read-error, but when I made an array with 1.2
superblocks (not the boot volume of course) using VelociRaptors, great
for testing crap disks that don't work in read, I did see it try to
correct read errors!  I was wondering if that is only applicable to
superblocks >= 1.x+?

Coincidence.

I know you can build yourself an initrd/miniroot so/on/so forth but its
nice when you can just build a kernel, run lilo and have it auto-detect
the raid1 volumes and boot accordingly (as you can with 0.90 superblocks).

The hack in lilo that allows it to do this is a very ugly hack.  It is
not even close to proper raid1 boot support.  I would look into grub2.

-- 
Doug Ledford [off-list ref]
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