Here are my results with -t -T
/dev/hda:
Timing buffer-cache reads: 1892 MB in 2.00 seconds = 945.67 MB/sec
Timing buffered disk reads: 172 MB in 3.04 seconds = 56.66 MB/sec
and then without options
/dev/hda:
multcount = 16 (on)
IO_support = 1 (32-bit)
unmaskirq = 1 (on)
using_dma = 1 (on)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 256 (on)
geometry = 65535/16/63, sectors = 240121728, start = 0
and finally with the -i option
/dev/hda:
Model=Maxtor 6Y120P0, FwRev=YAR41BW0, SerialNo=Y3JGZRCE
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
I'm using kernel 2.6.4 and Debian unstable. It looks like I have quite
a bit more readahead than you do. The drive has an 8mb buffer.
scott
Levi Bard wrote:
>
> The cache read looks ok to me, but should the disk read be better?
> Ian, is there anything special about that drive that would make the
> disk read so much better than the other two?
> Here are my settings:
> /dev/hda:
> multcount = 16 (on)
> IO_support = 1 (32-bit)
> unmaskirq = 1 (on)
> using_dma = 1 (on)
> keepsettings = 0 (off)
> readonly = 0 (off)
> readahead = 8 (on)
> geometry = 14596/255/63, sectors = 234493056, start = 0
>
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