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SubjectDMA BadCRC, cables exchanged, problem resists, any idea?
Hello,

I got the following error for 3 of my 4 harddrives:

hde: dma_intr: status=0x51 { DriveReady SeekComplete Error }
hde: dma_intr: error=0x84 { DriveStatusError BadCRC }
hde: dma_intr: status=0x51 { DriveReady SeekComplete Error }
hde: dma_intr: error=0x84 { DriveStatusError BadCRC }
hde: dma_intr: status=0x51 { DriveReady SeekComplete Error }
hde: dma_intr: error=0x84 { DriveStatusError BadCRC }
hde: dma_intr: status=0x51 { DriveReady SeekComplete Error }
hde: dma_intr: error=0x84 { DriveStatusError BadCRC }
hdf: DMA disabled
ide2: reset: success
hdg: dma_intr: status=0x51 { DriveReady SeekComplete Error }
hdg: dma_intr: error=0x84 { DriveStatusError BadCRC }
hdg: dma_timer_expiry: dma status == 0x20
hdg: timeout waiting for DMA

and so on. First I used round IDE-Cables, 80c Ribbon, now I use
flat 80c Ribbon. I tried with an CMD680-IDE-offboad-Controller and
the onboard Promise PDC20276. Both show the same effect. The
onboard-VIA VT 8233 (used for hda) never shows this error.

cat /proc/interrupts:
CPU0
0: 1264293 IO-APIC-edge timer
1: 23806 IO-APIC-edge keyboard
2: 0 XT-PIC cascade
8: 4 IO-APIC-edge rtc
9: 0 IO-APIC-level acpi
12: 10688 IO-APIC-edge PS/2 Mouse
14: 14589 IO-APIC-edge ide0
15: 97 IO-APIC-edge ide1
16: 449 IO-APIC-level ide2, ide3
17: 9142 IO-APIC-level eth0
21: 0 IO-APIC-level ehci_hcd, usb-uhci
NMI: 0
LOC: 1264212
ERR: 0
MIS: 0

IRQ 16 is the CMD680, ide0 and ide1 is the onboard VIA VT8235.
The machine acts as a fileserver, so it's worse falling back to
PIO instead of DMA. The Mainboard is an MSI-Tech KT3 Ultra 2 with
an VIA KT 333 Chipset (Athlon 1800 XP).
For testing purposes I tried the CMD680 in an Intel P4-based
Computer (same cables) but none of these nasty errors! The P4 was
running a 2.4.23 and the Athlon a 2.4.23.

Used harddrives:

/dev/hda:
multcount = 16 (on)
IO_support = 1 (32-bit)
unmaskirq = 1 (on)
using_dma = 1 (on)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 1232/255/63, sectors = 19807200, start = 0

Model=IBM-DTTA-351010, FwRev=T56OA73A, SerialNo=WF0WF036521
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=34
BuffType=DualPortCache, BuffSize=466kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=19807200
IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 *udma2
AdvancedPM=no WriteCache=enabled
Drive conforms to: ATA/ATAPI-4 T13 1153D revision 17: 1 2 3 4

/dev/hde:
multcount = 16 (on)
IO_support = 0 (default 16-bit)
unmaskirq = 1 (on)
using_dma = 1 (on)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 36024/16/63, sectors = 234493056, start = 0

Model=SAMSUNG SV1204H, FwRev=RK100-15, SerialNo=0450J1BW401217
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
RawCHS=16383/16/63, TrkSize=34902, SectSize=554, ECCbytes=4
BuffType=DualPortCache, BuffSize=2048kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=234493056
IORDY=yes, tPIO={min:120,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 udma5
AdvancedPM=no WriteCache=enabled
Drive conforms to: ATA/ATAPI-6 T13 1410D revision 1:

/dev/hdf:
multcount = 16 (on)
IO_support = 0 (default 16-bit)
unmaskirq = 1 (on)
using_dma = 0 (off)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 41608/16/63, sectors = 240121728, start = 0

Model=Maxtor 6Y120L0, FwRev=YAR41BW0, SerialNo=Y3K7N66E
Config={ Fixed }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57
BuffType=DualPortCache, BuffSize=2048kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=240121728
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
UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 *udma6
AdvancedPM=yes: disabled (255) WriteCache=enabled
Drive conforms to: (null):

/dev/hdg:
multcount = 0 (off)
IO_support = 0 (default 16-bit)
unmaskirq = 0 (off)
using_dma = 1 (on)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 19929/255/63, sectors = 320173056, start = 0

Model=Maxtor 6Y160P0, FwRev=YAR41BW0, SerialNo=Y42BANHE
Config={ Fixed }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57
BuffType=DualPortCache, BuffSize=7936kB, MaxMultSect=16, MultSect=off
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=268435455
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
UDMA modes: udma0 udma1 udma2 udma3 udma4 udma5 *udma6
AdvancedPM=yes: disabled (255) WriteCache=enabled
Drive conforms to: (null):

Any ideas, what I can change to get rid of these errors?

TIA Sven

(please CC)

--
Sven Schumacher, Department of Computer Science
University of Bremen, Bibliothekstraße 1, 28359 Bremen
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