Hi, I'm using SuSE Linux 8.0 with a 2.4.18 kernel, and a machine with a VIA vt82c686b southbridge. The system runs very stable with only one (Western Digital) hard disk on ide bus 0, but when I add a second (IBM) hard disk configured as slave, the kernel freezes when I'm accessing the second disk (after *some accesses, i.e. when I can copy 10 small files on it, it freezes on the third). I read the mailing list, lost of people seem to have problems with this configuration, but most advices are to change the cable, which I did. Symptoms are: the hard disk LED is on, the machine freezes (no blinking cursor on the text console, no remote access) or the caps lock & scroll lock LEDs on the keyboard flash, same lockup. I had the same problems with FreeBSD: "UDMA ICRC error writing fsbn 127590847 of 63795392-63795423 (ad1s1 bn 1275908 47; cn 7942 tn 41 sn 34) retrying" and I could get the system stable by switching to udma33, so I tried the same on linux:
hdparm -c1 -m16 -X66 -d1 /dev/hda hdparm -c1 -m16 -X66 -d1 /dev/hdb
but the kernel still hangs. Maybe someone can point me to a solution, please CC: me personally, because I'm not subscribed to this list. Thanks Oliver
dmesg
[...] Uniform Multi-Platform E-IDE driver Revision: 6.31 ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx VP_IDE: IDE controller on PCI bus 00 dev 39 VP_IDE: chipset revision 6 VP_IDE: not 100% native mode: will probe irqs later ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx VP_IDE: VIA vt82c686b (rev 40) IDE UDMA100 controller on pci00:07.1 ide0: BM-DMA at 0xd000-0xd007, BIOS settings: hda:DMA, hdb:DMA ide1: BM-DMA at 0xd008-0xd00f, BIOS settings: hdc:DMA, hdd:pio hda: WDC WD200EB-00CSF0, ATA DISK drive hdb: IC35L080AVVA07-0, ATA DISK drive hdc: DVD-ROM DDU1621, ATAPI CD/DVD-ROM drive ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 ide1 at 0x170-0x177,0x376 on irq 15 blk: queue c033ce24, I/O limit 4095Mb (mask 0xffffffff) hda: safely enabled flush hda: 39102336 sectors (20020 MB) w/2048KiB Cache, CHS=38792/16/63, UDMA(100) blk: queue c033cf74, I/O limit 4095Mb (mask 0xffffffff) hdb: safely enabled flush hdb: 160836480 sectors (82348 MB) w/1863KiB Cache, CHS=10011/255/63, UDMA(100) hdc: no flushcache support hdc: ATAPI 40X DVD-ROM drive, 512kB Cache [...]
cat /proc/ide/via
----------VIA BusMastering IDE Configuration---------------- Driver Version: 3.34 South Bridge: VIA vt82c686b Revision: ISA 0x40 IDE 0x6 Highest DMA rate: UDMA100 BM-DMA base: 0xd000 PCI clock: 33.3MHz Master Read Cycle IRDY: 0ws Master Write Cycle IRDY: 0ws BM IDE Status Register Read Retry: yes Max DRDY Pulse Width: No limit -----------------------Primary IDE-------Secondary IDE------ Read DMA FIFO flush: yes yes End Sector FIFO flush: no no Prefetch Buffer: no no Post Write Buffer: no no Enabled: yes yes Simplex only: no no Cable Type: 80w 40w -------------------drive0----drive1----drive2----drive3----- Transfer Mode: UDMA UDMA PIO PIO Address Setup: 30ns 30ns 30ns 120ns Cmd Active: 90ns 90ns 90ns 90ns Cmd Recovery: 30ns 30ns 30ns 30ns Data Active: 90ns 90ns 90ns 330ns Data Recovery: 30ns 30ns 30ns 270ns Cycle Time: 60ns 60ns 120ns 600ns Transfer Rate: 33.3MB/s 33.3MB/s 16.6MB/s 3.3MB/s
lspci -vvxxx
[...]
00:07.1 IDE interface: VIA Technologies, Inc. Bus Master IDE (rev 06) (prog-if 8a [Master SecP PriP])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- hdparm -vi /dev/hda /dev/hda:
multcount = 16 (on)
I/O support = 1 (32-bit)
unmaskirq = 1 (on)
using_dma = 1 (on)
keepsettings = 0 (off)
nowerr = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 2434/255/63, sectors = 39102336, start = 0
Model=WDC WD200EB-00CSF0, FwRev=04.01B04, SerialNo=WD-WMAAV2466224
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=39102336
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
AdvancedPM=no
Drive Supports : Reserved : ATA-1 ATA-2 ATA-3 ATA-4 ATA-5 hdparm -vi /dev/hdb /dev/hdb:
multcount = 16 (on)
I/O support = 1 (32-bit)
unmaskirq = 1 (on)
using_dma = 1 (on)
keepsettings = 0 (off)
nowerr = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 10011/255/63, sectors = 160836480, start = 0
Model=IC35L080AVVA07-0, FwRev=VA4OA50K, SerialNo=VNC402A4C6WUPA
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=52
BuffType=DualPortCache, BuffSize=1863kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=-66060037, LBA=yes, LBAsects=160836480
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=yes: disabled (255)
Drive Supports : ATA/ATAPI-5 T13 1321D revision 1 : ATA-2 ATA-3 ATA-4 ATA-5
Kernel Drive Geometry LogicalCHS=10011/255/63 PhysicalCHS=159560/16/63