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-   -   Nforce 3 limiting my DVD-RW to PIO (http://www.nvnews.net/vbulletin/showthread.php?t=46412)

membreya 02-23-05 04:41 AM

Nforce 3 limiting my DVD-RW to PIO
I'm currently running ubuntu with linux kernel 2.6.10-3.

When my system boots, I'm getting the following message:

Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx

Yet it detects my SATA as 133

I then do a hdparm -d /dev/hda (hda because the harddrive is sda being SATA and all :P)

hdparm -d /dev/hda gives the following message:

using_dma = 0 (off)

I do a hdparm -d1 /dev/hda and get:

setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
using_dma = 0 (off)

If I do a hdparm -i the message is as follows:


Model=PIONEER DVD-RW DVR-108, FwRev=1.18, SerialNo=
Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }
RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
BuffType=13395, BuffSize=64kB, MaxMultSect=0
(maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2 udma3 *udma4
Drive conforms to: device does not report version:

* signifies the current active mode

Finally hdparm -t /dev/hda gives the speed as 3.48mb/s

Just wondering if anyone can help?

The chipset onboard is an nforce3 from an Epox 8kdaj motherboard

chunkey 02-23-05 12:39 PM

Re: Nforce 3 limiting my DVD-RW to PIO

3.84 MB/s isn't bad for for a "PIONEER DVD-RW DVR-108"... that's something like 24x!

my old DVD-A105 is about: (with "using_dma = 1 (on)" )
Timing buffered disk reads: 10 MB in 3.66 seconds = 2.73 MB/sec

And did you run hdparm as root? if not, try it again as "root" ...

membreya 02-24-05 02:09 AM

Re: Nforce 3 limiting my DVD-RW to PIO
24x? the drive is 52x :)

and yup running it as boot :(

if you want the strace...

strace output

chunkey 02-24-05 05:07 AM

Re: Nforce 3 limiting my DVD-RW to PIO
Well my A105 should be something like 40x...

but you "must" know 40x (as 52x) is MARKETING... it's "top" / "peak" speed not the average...


and this picture: (from dvd-recordable.org) (it's a 16x Device!!!)

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