Re: IDE Harddrive Performance

Brendan Pike
2001-12-19T16:19:33Z

On Wednesday 19 December 2001 12:01 pm, Jan Niehusmann wrote:
> On Wed, Dec 19, 2001 at 11:44:47AM -0400, Brendan Pike wrote:
> > I dont really know, I dont think its possible to get higher then that
> > from a 5400 RPM disk. Heres mine,
>
> /dev/hda:
> Timing buffered disk reads: 64 MB in 2.32 seconds = 27.59 MB/sec
>
> bash-2.05a# cat /proc/ide/hda/model
> Maxtor 98196H8
>
> This is a 5400rpm drive, too.
>
> Jan
>
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wowie, that is quite slow then. well udma33 mode is probebly why. if getting
an ata100 offboard card (since i have an ata100 drive) would make such a big
differance, im all for it. would there be any others reasons for such
slowness? is udma33 capible of more then 9MB/sec ??

[root@spikes spike]# cat /proc/ide/via
----------VIA BusMastering IDE Configuration----------------
Driver Version: 3.29
South Bridge: VIA vt82c586b
Revision: ISA 0x47 IDE 0x6
Highest DMA rate: UDMA33
BM-DMA base: 0xe000
PCI clock: 33MHz
Master Read Cycle IRDY: 1ws
Master Write Cycle IRDY: 1ws
BM IDE Status Register Read Retry: yes
Max DRDY Pulse Width: No limit
-----------------------Primary IDE-------Secondary IDE------
Read DMA FIFO flush: yes yes
End Sector FIFO flush: no no
Prefetch Buffer: yes yes
Post Write Buffer: yes no
Enabled: yes yes
Simplex only: no no
Cable Type: 40w 40w
-------------------drive0----drive1----drive2----drive3-----
Transfer Mode: UDMA PIO PIO PIO
Address Setup: 30ns 120ns 30ns 120ns
Cmd Active: 90ns 90ns 90ns 90ns
Cmd Recovery: 30ns 30ns 30ns 30ns
Data Active: 90ns 330ns 90ns 330ns
Data Recovery: 30ns 270ns 30ns 270ns
Cycle Time: 90ns 600ns 120ns 600ns
Transfer Rate: 22.0MB/s 3.3MB/s 16.5MB/s 3.3MB/s

dont know if that info would help much but there it is. also uses the via
kernel driver.