Hi,
Inspired by mails of another curent thread I looked at hdparm
and played around with the options.
To my great surprise a simple 'hdparm -d1 /dev/hda' freezes my
system completely. No keyboard, no mouse. No chance to get to a
second tty to kill or mend something. The only way to get out
was the Windows button aka reset switch.
Details:
-----------------------------------------------------
[root@molch wobo]# hdparm -i /dev/hda
/dev/hda:
Model=ST320430A, FwRev=3.11, SerialNo=7BX09MRL
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs
RotSpdTol>.5% }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=0
BuffType=0(?), BuffSize=512kB, MaxMultSect=16, MultSect=off
DblWordIO=no, maxPIO=2(fast), DMA=yes, maxDMA=2(fast)
CurCHS=16383/16/63, CurSects=16514064, LBA=yes,
LBAsects=40079088
WARNING 23565024 ORPHANED SECTORS :: KERNEL REPORTING ERROR
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 mode3 *mode4
Drive Supports : ATA-1 ATA-2 ATA-3 ATA-4
------------------------------------------------------
[root@molch wobo]# hdparm /dev/hda
/dev/hda:
multcount = 0 (off)
I/O support = 0 (default 16-bit)
unmaskirq = 0 (off)
using_dma = 0 (off)
keepsettings = 0 (off)
nowerr = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 2494/255/63, sectors = 40079088, start = 0
------------------------------------------------------
[root@molch wobo]# hdparm -Tt /dev/hda
/dev/hda:
Timing buffer-cache reads: 128 MB in 2.31 seconds =55.41
MB/sec
Timing buffered disk reads: 64 MB in 11.08 seconds = 5.78
MB/sec
------------------------------------------------------
'hdparm -c3 /dev/hda' activates 32-bit and makes no problems. It
takes the 'timing buffered disk reads' to 6.2x.
'hdparm -d1' generates the proper output that dma-access is now
activated for hda. As soon as the hd is accessed the whole
system freezes with the red hd-light on.
Any ideas? As for the values of the hd one should assume it
should work with dma-access.
wobo
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