Greg wrote: > Hmmm, if I'm doing my calculations right I'm getting almost 40MB/s for > RAID-1 which should be slower than RAID-0, shouldn't it?
I'm not sure what you mean by "my calculations". In your earlier mail you wrote: > [EMAIL PROTECTED]:/home/ethant# dd if=/dev/zero of=/dev/rsd1c bs=64k > count=4096 > 4096+0 records in > 4096+0 records out > 268435456 bytes transferred in 6.441 secs (41674946 bytes/sec) dd is kind enough to tell you the b/w :) I guess you mean this. RAID-1, mirroring, is *not necessarily* slower than RAID-0, striping. Somewhere, something has to issue two write operations, one to each mirror, and then wait for both to finish before announcing that the I/O is finished. This may take a bit more time compared to a single disk, but it shouldn't be much. If you have multiple disks in a RAID-0 array, that should be much faster, of course. Rob Urban
