FW: [wplug] DMA
Coutch, Robert
Robert.Coutch at tvratings.com
Wed Mar 12 10:30:56 EST 2003
I'm guessing at this so WPLUG'ers correct me if I'm wrong.
The modes shown (pio1, pio2, ... udma0, udma1...) are what the controller
will do.
An asterisk (*) will appear next to what the drive will do.
No asterisk next to any dma modes = no dma.
Is this correct?
BTW - I apologize for all the typo's in my email lately.
-----Original Message-----
From: R.E.Coutch [mailto:coutchre at usaor.net]
Sent: Tuesday, March 11, 2003 11:10 PM
To: coutchre at tvratings.com
Subject: Re: [wplug] DMA
When I ran lsmod, ide-scsi is not loaded and when I ran hdparm with the
-i option I get the following:
[root at localhost root]# hdparm -i /dev/hdd
/dev/hdd:
Model=TOSHIBA DVD-ROM SD-M1502, FwRev=1008, SerialNo=1100306493
Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }
RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
BuffType=unknown, BuffSize=128kB, MaxMultSect=0
(maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2
AdvancedPM=no
Drive conforms to: ATA/ATAPI-5 T13 1321D revision 3: 2 3 4 5
I'm not a hardware guy, so I can't really tell if this drive supports DMA.
-Henry
Alexandros Papadopoulos wrote:
>-----BEGIN PGP SIGNED MESSAGE-----
>Hash: SHA1
>
>On Tuesday 11 March 2003 18:25, Henry Umansky wrote:
>
>
>>I believe it supports it, because the following works:
>>
>>[root at localhost linux-2.4]# hdparm -d1 /dev/hda
>>
>>/dev/hda:
>> setting using_dma to 1 (on)
>> using_dma = 1 (on)
>>
>>I'm not sure exactly how to check if its being emulated as a SCSI
>>drive.
>>
>>
>
>Grab the list of loaded modules with
># lsmod
>
>and look for ide-scsi or something similar.
>
>To check what your drive supports, you can try other hdparm switches,
>like hdparm -i /dev/hdd
>
>- -A
>- --
>http://andrew.cmu.edu/~apapadop/pub_key.asc
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