Hi,
On Mon, Dec 03, 2001 at 10:50:02AM +0100, Sřren Schmidt wrote:
> 1+0 records in
> 1+0 records out
> 524288 bytes transferred in 0.006204 secs (84507936 bytes/sec)
>
> But the disk needs to be idle or you risk getting another
> request inbetween ruining the cached data, or if you disk has
> less cache that 512k it will also fail.
I think they are idle (looking at vmstat -i), but i can't be sure.
However i have 2 machines here with VIA 82C596 chipset...
> If that all is OK, you should see something close to the
> real transfer speed of the interface, IF the ATA support
> code has setup your HW correctly. What controller and disks
> are we talking about here ?
# dmesg |grep ata
atapci0: <VIA 82C596 ATA66 controller> port 0xd800-0xd80f at device 4.1 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ad0: 28629MB <QUANTUM FIREBALLlct20 30> [58168/16/63] at ata0-master UDMA66
1+0 records in
1+0 records out
524288 bytes transferred in 0.029881 secs (17545865 bytes/sec)
1+0 records in
1+0 records out
524288 bytes transferred in 0.038572 secs (13592425 bytes/sec)
1+0 records in
1+0 records out
524288 bytes transferred in 0.024870 secs (21081110 bytes/sec)
1+0 records in
1+0 records out
524288 bytes transferred in 0.025267 secs (20749907 bytes/sec)
1+0 records in
1+0 records out
524288 bytes transferred in 0.025247 secs (20766367 bytes/sec)
It's idle (the LED isn't blinking after/before dd and vmstat -i doesn't
show any ata0 activity).
Even my Intel PIIX4 ATA33 controller with the same disk performs better (a
little)...
Bye
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