How do I add a drive to the DMA blacklist?

How do I add a drive to the DMA blacklist?

[Jonathan Kamens]

How do I get a drive added to the DMA blacklists in ide-dma.c?  I sent
E-mail to Andre Hedrick in August about a drive that claims to support
DMA but flakes out as soon as the kernel tries to use it -- the "WDC
AC31000H".  This is not surprising, since all the other WDC drives of
this vintage have the same problem.  I included a patch to add this
drive to the two blacklists in ide-dma.c.  Andre never responded to my
E-mail, and the drive still hasn't been added to the blacklists.

Am I doing something wrong?  What do I need to do to get this drive
added to the blacklists?

Thanks,

  Jonathan Kamens

Re: How do I add a drive to the DMA blacklist?

[Mark Hymers]

On Sun, 25, Nov, 2001 at 06:17:08PM -0500, Jonathan Kamens spoke thus..
> How do I get a drive added to the DMA blacklists in ide-dma.c?  I sent
> E-mail to Andre Hedrick in August about a drive that claims to support
> DMA but flakes out as soon as the kernel tries to use it -- the "WDC
> AC31000H".  This is not surprising, since all the other WDC drives of
> this vintage have the same problem.  I included a patch to add this
> drive to the two blacklists in ide-dma.c.  Andre never responded to my
> E-mail, and the drive still hasn't been added to the blacklists.
> 
> Am I doing something wrong?  What do I need to do to get this drive
> added to the blacklists?
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:

/proc/ide/hdc/model:
QUANTUM FIREBALLlct08 26

Are there any other details which would be handy?

Mark

-- 
Mark Hymers					 BLFS Editor
markh@linuxfromscratch.org

Re: How do I add a drive to the DMA blacklist?

[Valkai Elod]

On Mon, 26 Nov 2001, Mark Hymers wrote:

> On Sun, 25, Nov, 2001 at 06:17:08PM -0500, Jonathan Kamens spoke thus..
> > How do I get a drive added to the DMA blacklists in ide-dma.c?  I sent
> > E-mail to Andre Hedrick in August about a drive that claims to support
> > DMA but flakes out as soon as the kernel tries to use it -- the "WDC
> > AC31000H".  This is not surprising, since all the other WDC drives of
> > this vintage have the same problem.  I included a patch to add this
> > drive to the two blacklists in ide-dma.c.  Andre never responded to my
> > E-mail, and the drive still hasn't been added to the blacklists.
> >
> > Am I doing something wrong?  What do I need to do to get this drive
> > added to the blacklists?
> 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:
>
> /proc/ide/hdc/model:
> QUANTUM FIREBALLlct08 26

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!

-- 

========================.~.===============================================
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Re: How do I add a drive to the DMA blacklist?

[Piter Punk]

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:

/proc/ide/hdc/model:
QUANTUM FIREBALLlct08 26


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 
problems...

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

$ hdparm -i /dev/hda

/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
AdvancedPM=no
Drive Supports : ATA/ATAPI-5 T13 1321D revision 1 : ATA-1 ATA-2 ATA-3 ATA-4 
ATA-5

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|   #105432                                                         |
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