[CentOS-de] Bad hdd performance on ATA Drive

[Markus Falb]

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