Messages in this thread |  | | From | vda <> | Subject | Re: Poor IDE performance with VIA MVP3 | Date | Tue, 6 Nov 2001 11:50:12 +0000 |
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On Monday 05 November 2001 19:54, Mike Maravillo wrote:
> > That's the thing--it claims to be in UDMA mode, and again I get no > > errors. Even when I do 'hdparm -d1 -X66 /dev/hda", everything works > > fine, without errors, only the speed problems persist. Oh, and I have > > compiled my kernel with VIA IDE support, it makes no difference in the > > performance. > > > > It's sounding more and more like this isn't a driver/chipset problem, but > > something wrong with the HD itself. Thanks for your insight. > > This has been a long-standing problem with my system as well. I > have an MS-5187 VIA MVP4 board and ST320413A UltraATA/100 drive. > > Timing buffer-cache reads: 128 MB in 4.40 seconds = 29.09 MB/sec > Timing buffered disk reads: 64 MB in 13.06 seconds = 4.90 MB/sec > > Model=ST320413A, FwRev=3.39, SerialNo=7ED05MNS > Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% } > RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=0 > BuffType=unknown, BuffSize=512kB, MaxMultSect=16, MultSect=off > CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=39102336 > 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 udma0 udma1 udma2 udma3 *udma4 udma5 > AdvancedPM=no > Drive Supports : Reserved : ATA-1 ATA-2 ATA-3 ATA-4 > > I remember trying out the drive on a Soltek 75KAV and got better > buffered disk results, ~25.0 MB/sec.
In my experience, if kernel has no support for your particular IDE chip compiled in, you will likely be unable to get [u]dma working.
However, I have one hd which refuses to do dma even with proper support compiled in (I have PIIX IDE). All I can do is # hdparm -c1 -A1 -W1 /dev/hda and get 8mb/s in # hdparm -T -t /dev/hda -- vda - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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