Artem Kuchin wrote: > Now i am lost. i get 81MB/sec on dd but still you get > > File Copy 1024 bufsize 2000 maxblocks 3960.0 159513.0 402.8 > > and i get > > File Copy 1024 bufsize 2000 maxblocks 3960.0 109313.0 276.0 > > The drives i use are Seagate 7200.10 (320Gb, SATA II, 16MB cache > with perpendicular heads) > > How is it possible that you get 2x file copy perfomance ? What's the > matter?!
I don't know - what are your seek times?
# diskinfo -t /dev/mirror/data
/dev/mirror/data
512 # sectorsize
249999999488 # mediasize in bytes (233G)
488281249 # mediasize in sectors
Seek times:
Full stroke: 250 iter in 1.591444 sec = 6.366 msec
Half stroke: 250 iter in 1.468315 sec = 5.873 msec
Quarter stroke: 500 iter in 2.828050 sec = 5.656 msec
Short forward: 400 iter in 2.958083 sec = 7.395 msec
Short backward: 400 iter in 2.465687 sec = 6.164 msec
Seq outer: 2048 iter in 0.337428 sec = 0.165 msec
Seq inner: 2048 iter in 0.384791 sec = 0.188 msec
Transfer rates:
outside: 102400 kbytes in 1.737217 sec = 58945 kbytes/sec
middle: 102400 kbytes in 1.811793 sec = 56519 kbytes/sec
inside: 102400 kbytes in 2.938688 sec = 34845 kbytes/sec
drives:
ad4: 238418MB <WDC WD2500JS-75NCB3 10.02E04> at ata2-master SATA150
ad6: 238418MB <WDC WD2500JS-75NCB3 10.02E04> at ata3-master SATA150
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