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SubjectRe: How do I add a drive to the DMA blacklist?
Valkai Elod wrote:

On Mon, 26 Nov 2001, Mark Hymers wrote:

On Sun, 25, Nov, 2001 at 06:17:08PM -0500, Jonathan Kamens spoke thus..

Actually, while this subject is being brought up, if I don't do:
/sbin/hdparm -d0 /dev/hdc
on bootup, my system locks up randomly. Looks like a DMA issue with my
hdc drive.. Details are:


This seems to confirm my doubts about Quantum lct drives' sanity. I'm
having two drives: a Quantum CX 13G, and a Maxtor 40G@5400. Both work with
UDMA33 (mb doesn't support more). When i put a QUANTUM FIREBALL lct20 20G
drive in my rack, random lockups occur. I'd put all Quantum LCT drives on
the blacklist!

My Quantum Fireball lct20 works fine, and i work in UDMA 5, without any

Ok, i have a problem, in Ultra 5 i can't got same performance of other (no
cheap) HDs...

$ hdparm -i /dev/hda


Model=QUANTUM FIREBALLlct20 20, FwRev=APL.0900, SerialNo=552114732078
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
RawCHS=16383/16/63, TrkSize=32256, SectSize=21298, ECCbytes=4
BuffType=DualPortCache, BuffSize=418kB, MaxMultSect=8, MultSect=off
CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=39876480
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
Drive Supports : ATA/ATAPI-5 T13 1321D revision 1 : ATA-1 ATA-2 ATA-3 ATA-4

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