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rowan · 03-02-2007, 03:11 PM

I migrated my array from RAID10 to RAID5, and ran HD tach on each...

RAID10: Average read 93.6MB/s, burst 214.7MB/s
RAID5: Average read 163.0MB/s, burst 1143.3MB/s

I'm sceptical of the burst speed for RAID5. Can the data/RAM bus even transfer data at 1143 megs per sec?

I also expected average read for RAID5 would be similar, or perhaps even worse than RAID10.

My comp just rebooted, now I remember why I changed from RAID5 to RAID10 all those months ago. The array is now rebuilding parity which means I have a slow as shit computer for the next 6 hours! If it reboots again then it's possible I'll lose the array.

Intel's RAID5 driver seems to be buggy as hell; never had a single problem on RAID10.

I guess I'll be reinstalling Windows today, the RAID10-RAID5 migration feature is one way only...

03-02-2007, 03:11 PM
rowan Too lazy to set a custom title Join Date: Mar 2002 Location: Australia Posts: 17,393	RAID5 vs RAID10 speed I migrated my array from RAID10 to RAID5, and ran HD tach on each... RAID10: Average read 93.6MB/s, burst 214.7MB/s RAID5: Average read 163.0MB/s, burst 1143.3MB/s I'm sceptical of the burst speed for RAID5. Can the data/RAM bus even transfer data at 1143 megs per sec? I also expected average read for RAID5 would be similar, or perhaps even worse than RAID10. My comp just rebooted, now I remember why I changed from RAID5 to RAID10 all those months ago. The array is now rebuilding parity which means I have a slow as shit computer for the next 6 hours! If it reboots again then it's possible I'll lose the array. Intel's RAID5 driver seems to be buggy as hell; never had a single problem on RAID10. I guess I'll be reinstalling Windows today, the RAID10-RAID5 migration feature is one way only...