Messages in this thread | | | Date | Fri, 24 Mar 2000 12:20:18 +0100 | From | Harald Koenig <> | Subject | VIA MVP3 gives bad IDE UDMA33 performace ?! |
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Hi,
is there any chance to get better IDE performace for VIA MVP3 chipset ?
I'm using a 40GB 7200rpm Maxtor disk which can deliver ~28 MB/sec, but with my main board (DFI K6BV3+) I only get ~13-16 MB/sec :-(
here is some information from kernel 2.3.51 startup and hdparm:
Uniform Multi-Platform E-IDE driver Revision: 6.30 VP_IDE: IDE controller on PCI bus 00 dev 39 VP_IDE: not 100% native mode: will probe irqs later VT 82C598 Apollo MVP3 Chipset Core ATA-33 Split FIFO Configuration: 16 Primary buffers, threshold = 3/4 0 Second. buffers, threshold = 1/2 ide0: BM-DMA at 0xd000-0xd007, BIOS settings: hda:DMA, hdb:DMA ide0: VIA Bus-Master (U)DMA Timing Config Success hda: Maxtor 54098U8, ATA DISK drive ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 hda: Maxtor 54098U8, 39082MB w/2048kB Cache, CHS=79406/16/63, (U)DMA Partition check: hda: [EZD] [remap 0->1] [4982/255/63] hda1
# hdparm -I /dev/hda
/dev/hda:
Model=aMtxro5 04898U , FwRev=AD26C00Q, SerialNo=8K30NECK Config={ Fixed } RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57 BuffType=3(DualPortCache), BuffSize=2048kB, MaxMultSect=16, MultSect=off DblWordIO=no, OldPIO=2, DMA=yes, OldDMA=0 CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=80041248 tDMA={min:120,rec:120}, DMA modes: mword0 mword1 mword2 IORDY=on/off, tPIO={min:120,w/IORDY:120}, PIO modes: mode3 mode4 UDMA modes: mode0 mode1 *mode2 mode3 mode4
I've tried 'hdparm -m8 /dev/hda' and similar to change `MultSect=off' but this doesn't make any difference.
I'll attach a small PS file which shows transfer rates for the whole 40GB (position in MB vs. MB/sec) with both UDMA33 (my board) and UDMA66 (K7 system from a friend).
as you can see, my UDMA33 system gives exactly half the performace for the outermost cylinders and surprisingly I get the same transfer as UDMA66 only for the very innermost cylinders! there both PCs give ~16.5 MB/sec.
any idea/hint/suggestion what I can try to get better transfer rate with my main board ?
btw: transfer rate is the same for clean 2.2.14 and 2.3.47/2.3.51 kernels.
thanks for any hint,
Harald -- All SCSI disks will from now on ___ _____ be required to send an email notice 0--,| /OOOOOOO\ 24 hours prior to complete hardware failure! <_/ / /OOOOOOOOOOO\ \ \/OOOOOOOOOOOOOOO\ \ OOOOOOOOOOOOOOOOO|// Harald Koenig, \/\/\/\/\/\/\/\/\/ Inst.f.Theoret.Astrophysik // / \\ \ koenig@tat.physik.uni-tuebingen.de ^^^^^ ^^^^^ [unhandled content-type:application/x-gunzip] | |