Notice the line that says DMA=yes, OldDMA=2. Also the line with
DMA modes: ... *mword2. Options with asterisks are those that the
drive is currently using. Your drive does support UDMA but I don't
think you have a kernel compiled with an EIDE controller that
supports UDMA. You may have better luck with PIO. Here is a
synopsis of my drives,
UDMA 2 Samsung SV0644A, 51MB/sec cache, 12.40 MB/sec read
UDMA 2 Maxtor 5373U6, 51MB/sec cache, 10.65 MB/sec read
UDMA 2 IBM-DTTA-351010, 51MB/sec cache, 10.08 MB/sec read
(-d0)
PIO Samsung SV0644A, 51MB/sec cache, 5.46 MB/sec read
PIO Maxtor 5373U6, 51MB/sec cache, 5.47 MB/sec read
PIO 2 IBM-DTTA-351010, 51MB/sec cache, 5.08 MB/sec read
Removeable drive on another machine with UDMA4
UDMA 4 Maxtor 5373U6, 51MB/sec cache, 22.35 MB/sec read
Try disabling the DMA, it might actually be better. You need
to read the UltraDMA faq and get a code to use the UDMA on your
EIDE controller to really speed things up. My mp3 use to skip,
I cann't make a load on my machine (with 3Dnow optimized) that
will cause skipping.
hth,
Bill
Eggert> My hdparm -i /dev/hdb tells:
/dev/hdb:
Model=ST36531A, FwRev=3.11, SerialNo=VS801298
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
RawCHS=13446/15/63, TrkSize=0, SectSize=0, ECCbytes=0
BuffType=0(?), BuffSize=128kB, MaxMultSect=32, MultSect=off
DblWordIO=no, OldPIO=2, DMA=yes, OldDMA=2
CurCHS=13446/15/63, CurSects=12706470, LBA=yes, LBAsects=12706470
tDMA={min:120,rec:120}, DMA modes: mword0 mword1 *mword2
IORDY=on/off, tPIO={min:240,w/IORDY:120}, PIO modes: mode3 mode4
UDMA modes: mode0 mode1 mode2
Drive Supports : ATA-1 ATA-2 ATA-3 ATA-4
Eggert> In my ignorance I thought this means I can enable
Eggert> DMA. However, if I try
Eggert> hdparm -d1 -X34 /dev/hdb
Eggert> it tells me that is not allowed, and sets it back to 0. What
Eggert> does that mean ? The c1 option works, however.
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