Re: raid 1
- From: Alex Samad <alex@xxxxxxxxxxxx>
- Date: Thu, 19 Jul 2007 09:29:06 +1000
On Wed, Jul 18, 2007 at 04:23:38PM -0700, Mike Bird wrote:
On Wednesday 18 July 2007 15:50, besonen wrote:I believe the newer grubs handle that - they write mbr to all drives in the
is it true that with software raid 1 that i cannot have the boot drive
protected?
No. However, getting the mirror of the boot drive to be bootable
under grub in readiness for when the boot drive fails does not seem
to me to be quite as easy/reliable as it was under LILO. Maybe a
grub expert can post a reliable recipe here.
raid set
if this is the case what are some work-arounds besides using a
3ware controller for just the boot drive?
n/a
can i take a single drive that was part of a mirrored array and attach it
to another computer and access the data?
With software RAID 1 yes. (But not with other RAID levels.)
if a hard drive in a mirrored array fails, and i replace the failed drive,
will the array auto-rebuild?
Software RAID usually mirrors partitions rather than whole drives.
You'll need to partition the new drive and add the new partititions to
the RAIDs. A couple of minutes work. The mirrors will then rebuild.
You can have a spare drive sitting in the machine as a hot spare if you want
....
and during the rebuild process, can the
rebuild be throttled such that the system remains usable while the rebuild
occurs?
Yes. You can change the speedlimits by echoing integers into
/proc/sys/dev/raid/speed_limit_{min,max}
--Mike Bird
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