Raid 1 Performance

nick_000000 · 15 Oct 2007 at 09:47

Just wondering if you were using 2 drives in a raid 1 array as the system drive should that lower the performance of the drives as I tried it and it was really slow :mad:

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rpstewart · 15 Oct 2007 at 10:02

I tried RAID1 at one point on an NForce4 controller and was far from impressed. Reads were pretty much single drive speed but the writes were poor, as a result task swapping was a nightmare due to the page file writes.

nick_000000 · 15 Oct 2007 at 10:54

Yeah everything was running really slowly though seemed like it couldn't read very fast, maybe too much going on between the two drives.

JimAroo · 17 Oct 2007 at 22:21

"RAID 1 is usually implemented as mirroring; a drive has its data duplicated on two different drives using either a hardware RAID controller or software (generally via the operating system). If either drive fails, the other continues to function as a single drive until the failed drive is replaced. Conceptually simple, RAID 1 is popular for those who require fault tolerance and don't need top-notch read performance. A variant of RAID 1 is duplexing, which duplicates the controller card as well as the drive, providing tolerance against failures of either a drive or a controller. It is much less commonly seen than straight mirroring"

Taken from: http://www.pcguide.com/ref/hdd/perf/raid/levels/singleLevel1-c.html

That would explain why it was so slow, RAID0 is what you want if your after performance.