[CentOS-de] Bad hdd performance on ATA Drive
Markus Falb
markus.falb at fasel.at
So Apr 5 14:24:24 UTC 2009
Achim Theobald wrote:
> server:~ # hdparm -i /dev/hda
>
> /dev/hda:
>
> Model=WDC WD3200AAJB-00J3A0, FwRev=01.03E01, SerialNo=WD-WCAV20413502
> Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs
> FmtGapReq } RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=50
> BuffType=unknown, BuffSize=8192kB, MaxMultSect=16, MultSect=16
> CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=268435455
> IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120} PIO
> modes: pio0 pio3 pio4
> DMA modes: mdma0 mdma1 mdma2
> UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 *udma6 AdvancedPM=no
> WriteCache=enabled
> Drive conforms to: Unspecified: ATA/ATAPI-1 ATA/ATAPI-2 ATA/ATAPI-3
> ATA/ATAPI-4 ATA/ATAPI-5 ATA/ATAPI-6 ATA/ATAPI-7
>
> * signifies the current active mode
>
> server:~ # hdparm -Tt /dev/hda
>
> /dev/hda:
> Timing cached reads: 13072 MB in 2.00 seconds = 6541.07 MB/sec
> Timing buffered disk reads: 8 MB in 3.04 seconds = 2.63 MB/sec
>
aus der manpage von hdparm:
| Some drives, however (most notably the WD Caviar series), seem to run
| slower with multiple mode enabled
ich würde also als erstes ein erstes ein
$ hdparm -m0 /dev/hda
versuchen.
(oder -m4 -m8 etc.)
--
lg, markus