This is a serious problem. I just installed 8.04 on an ASUS M3A78-EMH
HDMI with three WR Raptor SATA drives.
# hdparm -tT /dev/sda# hdparm -i /dev/sda
/dev/sda:
Model=WDC WD740ADFD-00NLR5 , FwRev=21.07QR5, SerialNo=
WD-WMANS2252557
Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }
RawCHS=16383/16/63, TrkSize=57600, SectSize=600, ECCbytes=48
BuffType=DualPortCache, BuffSize=16384kB, MaxMultSect=16, MultSect=?16?
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=145226112
IORDY=on/off, tPIO={min:120,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 *udma6
AdvancedPM=no WriteCache=enabled
Drive conforms to: ATA/ATAPI-7 published, ANSI INCITS 397-2005:
ATA/ATAPI-1,2,3,4,5,6,7
* signifies the current active mode
/dev/sda:
Timing cached reads: 2054 MB in 2.00 seconds = 1026.74 MB/sec
Timing buffered disk reads: 68 MB in 3.09 seconds = 22.03 MB/sec
I'm getting better performance out of 7200 rpm drives on a machine with
7.10 on it.
None of the above suggestions improve performance any. I should be
seeing over 3 times the throughput.
Is anyone looking into this problem?
--
Slow SATA performance
https://bugs.launchpad.net/bugs/119730
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