On Wednesday 19 November 2008 10:12, Per Jessen wrote:
Greg Freemyer wrote:
If you want to test it on a single drive, at least use dd to do your benchmarking.
These are my numbers for a 20G file on RAID1 over two SATA drives:
dd if=/tmp/file1 of=/tmp/file2 bs=512 dd if=/tmp/file1 of=/tmp/file2 bs=4k
I didn't bother with those two.
dd if=/tmp/file1 of=/tmp/file2 bs=1M
27m28s 13Mb/sec
dd if=/tmp/file1 of=/tmp/file2 bs=1000M
17m34s 20Mb/sec
That's not really a correct computation. Every byte (or sector or whatever) must be read once and written once, and you have to account for both the read and the write traffic. 40 GB = 42949672960 bytes 27m28s = 1648 s 26,061,695 bytes / s 17m34s = 1054 s 40,749,215 bytes / s
-- /Per Jessen, Zürich
Randall Schulz -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org