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SubjectExtremely low disk performance on K7S5A Pro
Date
Hi,

since I replaced my Abit KT7 with an Elitegroup K7S5A Pro (SIS735), I've
got extremly low disk performance with every tested kernel version
(2.4.20, 2.6.0-test6-mm2):

# hdparm -tT /dev/hda
/dev/hda:
Timing buffer-cache reads: 824 MB in 2.00 seconds = 411.65 MB/sec
Timing buffered disk reads: 10 MB in 3.28 seconds = 3.05 MB/sec
^^^^

DMA, 32bit etc. is activated (hdparm -d1 -c3 -u1 /dev/hda):

# hdparm -v -i /dev/hda
/dev/hda:
multcount = 16 (on)
IO_support = 3 (32-bit w/sync)
unmaskirq = 1 (on)
using_dma = 1 (on)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 256 (on)
geometry = 65535/16/63, sectors = 117231408, start = 0

Model=ST360021A, FwRev=3.10, SerialNo=3HR0E280
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
BuffType=unknown, BuffSize=2048kB, MaxMultSect=16, MultSect=16
CurCHS=4047/16/255, CurSects=16511760, LBA=yes, LBAsects=117231408
IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5
AdvancedPM=no WriteCache=enabled
Drive conforms to: device does not report version:

Any hints how this problem could be solved?

--
AVR-Tutorial, über 350 Links
Forum für AVRGCC und MSPGCC
-> http://www.mikrocontroller.net

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