Re: problems with new vacuum (??)

Don Baccus <dhogaza(at)pacifier(dot)com> writes:
> If Tom's system is IDE-based and he's not explicitly enabled DMA then
> this alone would explain the difference you two are seeing,

It is IDE, but DMA is on:

[root(at)rh1 root]# hdparm -v /dev/hda

/dev/hda:
multcount = 16 (on)
I/O support = 0 (default 16-bit)
unmaskirq = 0 (off)
using_dma = 1 (on)
keepsettings = 0 (off)
nowerr = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 9729/255/63, sectors = 156301488, start = 0

[root(at)rh1 root]# hdparm -i /dev/hda

/dev/hda:

Model=ST380021A, FwRev=3.10, SerialNo=3HV0CZ2L
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
BuffType=unknown, BuffSize=2048kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=156301488
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 udma0 udma1 udma2 udma3 udma4 *udma5
AdvancedPM=no
Drive Supports : Reserved : ATA-1 ATA-2 ATA-3 ATA-4 ATA-5

This is an out-of-the-box RH 7.2 install (kernel 2.4.7-10) on recent
Dell hardware. If anyone can suggest further tuning of the hdparm
settings, I'm all ears. Don't know a darn thing about disk tuning
for Linux.

regards, tom lane