I have no idea why you are getting any lockups as a result of software
raid as I have over 7TB of data stored on linux software raid (5 and
6) and I have never experienced a single lockup from that although
most of this is on server class systems I do have a few systems on
older desktop  athlon systems using either highpoint or promise
controllers and 120GB WD drives. I am using gentoo on and 2.6 kernels
on all systems and in most cases I am using reieserfs with a few being
XFS or ext3.  Also most of my raid arrays have lvm on top of md as I
try to avoid having a single filesystem of > 1TB.


As for your question of iSCSI I believe that would totally eliminate
the problem but it will be very costly. Are you using the onboard ide
controller or some other card? Have you ran memtest86 for at least 24
hours with your system? Do you have smart running on your drives? If
so have all the drives passed? Are there any io errors in your dmesg
output?



This is most definitely a desktop class system that I'm using.  I have not
run an extended memtest as you suggest, I do have SMART running on the
drives (4 x 250GB ATA-100) and they seem to be healthy.  I'm using the
on-board controller with an add-on PDC20248.  I too am using LVM on top of
my RAID arrays.

I'm wondering however, if I'm using my storage inefficiently... I have the
disks partitioned as such:

/dev/hdx1 - 128MB
/dev/hdx2 - 100GB
/dev/hdx3 - Remaining Space

I have configured /dev/hdx1 (md0) as my RAID1 /boot partition outside of
LVM... my /dev/hdx2 (md1) as a RAID-5 array as a PV for my root VG.. system
partitions... and /dev/hdx3 (md2) as a PV for my Video VG... where I store
everything.

The lockups I have... which are more infrequent now since I've dropped the
buggy VIA motherboard... are ALWAYS related to the Software RAID... because
when I bring it back up... md2 is dirty and must resync...

I have a pretty hefty power-supply in the system... in my estimation... it's
no smaller than 450W... which should be enough, I thought.  I'm just annoyed
with the whole thing and am looking for a solution.

Thanks,

Andy
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