[mythtv-users] RAID thread

[Nathan Nottingham]

	Alas, I'm answering my own thread...  

	But I'm sure others would like to see these results.  I was
originally using a Asus P4P800 SE motherboard.  Unfortunately, this board
has 2 IDE buses and my new PCI IDE card is still being shipped.  My wife
kindly donated her Asus P4P800 Deluxe after a little kicking, screaming, and
general unrest.  This board is very similar to the SE with the important
addition of a VIA4610 RAID controller.

	While the chipset isn't supported in the 2.4.25 kernel it didn't
take much effort to modify the general PCI drivers to accommodate the new
bus.  

	DMA was enabled for all drives in both cases.  Nothing fancy with
hdparm (yet).

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2xIDE buses with 4 drives

dvdserver root # cat /proc/mdstat
Personalities : [raid5]
read_ahead 1024 sectors
md0 : active raid5 ide/host0/bus1/target1/lun0/part1[2]
ide/host0/bus1/target0/lun0/part1[1]
ide/host0/bus0/target1/lun0/part1[0]
   488391680 blocks level 5, 128k chunk, algorithm 2 [3/3] [UUU]
   [>....................]  resync =  3.7% (9119976/244195840)
finish=231.8min speed=16896K/sec

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4xIDE buses with 4 drives (32k chunk):

dvdserver root # cat /proc/mdstat
Personalities : [raid5]
read_ahead 1024 sectors
md0 : active raid5
ide/host2/bus1/target0/lun0/part1[2]
ide/host2/bus0/target0/lun0/part1[1]
ide/host0/bus1/target0/lun0/part1[0]
   488391808 blocks level 5, 32k chunk, algorithm 2 [3/3] [UUU]
   [==>..................]  resync = 10.3% (25283084/244195904)
finish=70.6min speed=51648K/sec

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