Messages in this thread | | | Date | Thu, 11 Jan 2001 07:33:44 -0600 | From | James Brents <> | Subject | IDE DMA problems on 2.4.0 with vt82c686a driver |
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Hello, Since this looks like either a chipset, drive, or driver problem, I am submitting this. I have recently started using DMA mode on my harddisk. However, I occasionally (not often/constant, but sometimes) get CRC errors: hda: dma_intr: status=0x51 { DriveReady SeekComplete Error } hda: dma_intr: error=0x84 { DriveStatusError BadCRC }
After reading some archives in linux-kernel, I tried changing some options. Then I changed out the 40 pin, 80 wire cable with a new one. The errors still occasionally happened, so I then checked out the included floppy disk with the drive and used the utilities and saw that it was set for a maximum capability of ATA/100, so i changed it to ATA/66, but no change in results. I've since changed it back to ATA/100 capabilities. Running without DMA mode never gives any errors what so ever. Running with DMA mode gives me over 30 more MB/sec, so I would really like to use it...
My main concern that I havnt beem able to find an answer for on any archives or documentation, Can this cause file system corruption in any way?
The hardware is a VP_IDE: VIA vt82c686a IDE UDMA66 (VIA KT133 chipset on an Abit KT7 board) The drive is a Western Digital Caviare 7200rpm 40gig hard drive. I have support for my chipset compiled in as well
Kernel: 2.4.0
[root@Earth root]$ hdparm -i /dev/hda
/dev/hda:
Model=WDC WD400BB-00AUA1, FwRev=18.20D18, SerialNo=WD-WMA6R2018028 Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq } RawCHS=16383/16/63, TrkSize=57600, SectSize=600, ECCbytes=40 BuffType=DualPortCache, BuffSize=2048kB, MaxMultSect=16, MultSect=off CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=78165360 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
[root@Earth root]# hdparm -I /dev/hda
/dev/hda:
Model=DW CDW04B0-B00UA1A , FwRev=812.D081, SerialNo=DWW-AMR6028120 Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq } RawCHS=16383/16/63, TrkSize=57600, SectSize=600, ECCbytes=40 BuffType=DualPortCache, BuffSize=2048kB, MaxMultSect=16, MultSect=16 CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=78165360 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
[root@Earth root]# hdparm /dev/hda
/dev/hda: multcount = 0 (off) I/O support = 0 (default 16-bit) unmaskirq = 0 (off) using_dma = 1 (on) keepsettings = 0 (off) nowerr = 0 (off) readonly = 0 (off) readahead = 8 (on) geometry = 4865/255/63, sectors = 78165360, start = 0
PIO modes: pio0 pio1 pio2 pio3 pio4 DMA modes: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 *udma4 udma5
VP_IDE: VIA vt82c686a IDE UDMA66 controller on pci0:7.1 ide0: BM-DMA at 0xd000-0xd007, BIOS settings: hda:DMA, hdb:pio ide1: BM-DMA at 0xd008-0xd00f, BIOS settings: hdc:DMA, hdd:pio ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 ide1 at 0x170-0x177,0x376 on irq 15 hda: 78165360 sectors (40021 MB) w/2048KiB Cache, CHS=38166/64/32, UDMA(66)
If any other information is needed, I will be more than happy to supply it. Any help/information will be greatly appreciated. Thank you.
-- James Brents James@nistix.com
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