Re: [gentoo-user] /dev/hdb performance really sucks ...

[Tomas Bohata <gentoo@birt.cz>]

Richard Watson napsal(a):
> Hi - I'm getting vastly different performance results on hda (master) as
> opposed to hdb (slave). Basically when my root partition mounts (/dev/hdb)
> I'm warned that DMA is off, yet hdparm -i shows udma as active. Basically
> /dev/hdb performance sucks ... I've bought both drives in the last few
> months. The motherboard is quite old (3 years .. I think).
> 
> Any suggestions would be appreciated. 
> --
> Thanks - Richard
> 
> =============================
> 
> /dev/hda:
>  Timing cached reads:   1360 MB in  2.00 seconds = 678.75 MB/sec
>  Timing buffered disk reads:  146 MB in  3.03 seconds =  48.22 MB/sec
> 
> /dev/hdb:
>  Timing cached reads:   1376 MB in  2.00 seconds = 687.42 MB/sec
>  Timing buffered disk reads:   10 MB in  3.51 seconds =   2.85 MB/sec
> 
> /dev/hda:
> 
>  Model=Maxtor 6Y120P0, FwRev=YAR41BW0, SerialNo=Y36DHLVE
>  Config={ Fixed }
>  RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57
>  BuffType=DualPortCache, BuffSize=7936kB, MaxMultSect=16, MultSect=16
>  CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=240121728
>  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=yes: disabled (255) WriteCache=enabled
>  Drive conforms to: (null): 
> 
>  * signifies the current active mode
> 
> 
> /dev/hdb:
> 
>  Model=ST3200826A, FwRev=3.03, SerialNo=5ND0CVYX
>  Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
>  RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
>  BuffType=unknown, BuffSize=8192kB, MaxMultSect=16, MultSect=16
>  CurCHS=65535/1/63, CurSects=4128705, LBA=yes, LBAsects=268435455
>  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: 
> 
>  * signifies the current active mode
> 
> 

maybe they dont like each other, try to plug second hd to another 
controller (hdc/hdd)

T.B.

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