Intel ICH8R chipset

Hall, Eric R eric.r.hall at
Thu Mar 1 06:13:13 UTC 2007

I agree.  BIOS hasn't a clue about the raid configuration.  But in
regards to md, couldn't an initrd be used to mount "/" on the raid from
the next disk from that raid?

Once md is loaded at initrd, you would then have access to the raid and
would be able to continue boot.  It'll be in degraded mode, but it
should boot.  (I could be very wrong though!)

-----Original Message-----
From: Daniel O'Connor [mailto:darius at] 
Sent: Wednesday, February 28, 2007 9:46 PM
To: Hall, Eric R
Cc: ATARAID (eg, Promise Fasttrak, Highpoint 370) related discussions;
Darrick J. Wong
Subject: Re: Intel ICH8R chipset

On Thursday 01 March 2007 15:39, Hall, Eric R wrote:
> Or one could just mirror /boot from the first disk to the first two or
> three disks.  It'd be a pain, but you might still be able to boot...

How? The BIOS is doing the reading from those disks if it doesn't
how to use the redundancy there is a problem.

I would be surprised if a "firmware" RAID system (like say a Promise
or FT2300) would be any slower than using those disks on a comparable
non-RAID controller.

Once the OS starts it is its responsibility to maintain the metadata but
should still be able to get a good speed. I would say the requirement to
the metadata to disk will slow it down but a pure software RAID system
do the same or risk array corruption.

Daniel O'Connor software and network engineer
for Genesis Software -
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
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