Szentivanyi Matyas wrote:
Hi Heinrich!
I think it's almost the best speed you can achieve from the device. I've
got the same type of Soekris with a SAMSUNG HM080HC HDD (which is the
slave).
This HDD supports perpendicular recording
(http://en.wikipedia.org/wiki/Perpendicular_recording). Higher data
recording density means bigger transfer speeds.
I'm running Gentoo Linux with kernel version 2.6.18 on the Soekris.
Here are the results:
soekris ~ # dd if=/home/100mb.dat of=/dev/null
204800+0 records in
204800+0 records out
104857600 bytes (105 MB) copied, 7.7067 seconds, 13.6 MB/s
(The CPU usage is also 100% here while the reading is done. I've been
using ext3 filesystem.)
Cheers,
Matyas
Hi Matyas,
attaching the drive to a notebook via a IDE/USB converter easily yields
20 MB/s. So the drive *is* faster. While i could live with 8 MB/s i
cannot accept the high CPU usage. It seems to make the installed crypto
accelerator almost ineffective because the interrupts cannot be served
fast enough.
I suspect that the disk is not running in DMA mode. Is there any tool to
verify that (like Linux's hdparm)?
Cheers,
Heinrich
