I'm looking at whether my IDE devices are getting configured right by
default. I haven't done much experimenting, since this is, um,
potentially exciting.
What room for improvement do people see in the following drive, and
how risky would going for that improvement be?
gw:Mail# hdparm -i /dev/hdc
/dev/hdc:
Model=WDC WD200BB-00AUA1, FwRev=18.20D18, SerialNo=WD-WMA6Y3119666
Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }
RawCHS=16383/16/63, TrkSize=57600, SectSize=600, ECCbytes=40
BuffType=3(DualPortCache), BuffSize=2048kB, MaxMultSect=16, MultSect=off
DblWordIO=no, OldPIO=2, DMA=yes, OldDMA=0
CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=39102336
tDMA={min:120,rec:120}, DMA modes: mword0 mword1 mword2
IORDY=on/off, tPIO={min:120,w/IORDY:120}, PIO modes: mode3 mode4
UDMA modes: mode0 mode1 mode2 mode3 mode4 *mode5
gw:Mail# hdparm -c /dev/hdc
/dev/hdc:
I/O support = 0 (default 16-bit)
Looks like multi-word DMA might be appropriate. Does the "*" on the
UDMA line say it's already selected mode 5? The man page doesn't say
much about interpreting the output. Would multi-sector reads be worth
looking at? Any other suggestions, or warnings about how to avoid
destroying the universe by mistake while playing with this?
--
David Dyer-Bennet / Welcome to the future! / dd-b at dd-b.net
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