Re: IDE Harddrive Performance

[Brendan Pike <spike@superweb.ca>]

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.