[ale] kernel frustrations

[pfrostie at yahoo.com (phrostie)]

for give my ignorance but what are DMA and PIO modes.

acctually it's slower in 2.4 with the errors than when i'm running the 2.2.
i'm guessing it's spending a lot of time writting error messages.

anyway hdparm -i /dev/hda gives:

<snip>
/dev/hda:

 Model=WDC WD300AB-00BVA0, FwRev=21.01H21, SerialNo=WD-WMA7H1453518
 Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }
 RawCHS=16383/16/63, TrkSize=57600, SectSize=600, ECCbytes=40
 BuffType=DualPortCache, BuffSize=2048kB, MaxMultSect=16, MultSect=off
 CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=58633344
 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 udma0 udma1 udma2 udma3 udma4 udma5 
 AdvancedPM=no
 Drive Supports : Reserved : ATA-1 ATA-2 ATA-3 ATA-4 ATA-5 
</snip>


>
> 	My first stab: are you running in DMA mode of > 2 (UDMA 66 or 100?)
> with a 40 pin cable?  Usually, the driver recognizes this, and disallows
> it.  Try 'hdparm -i /dev/hda' to see what it sez.
>
> 	Another stab would be to see if it happens in PIO mode.  It can be
> incredibly slower, but you'd rather have it slow and right rather than
> fast and wrong....

-- 
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