there is nothing to do.
I had the same problem on XP1000 with FreeBSD.
AS for XP1000 the problem is in the case design.
Things inside XP1000 for example are stuffed in a terrible way.
XP1000 has a great external design, but I think it was designed by
an architect or something because is beautiful outside but terrible
inside, there is no space for cables.
Ata cables are very sensitive to interferences and this make DMA
transfer fail... I had the same problem I discussed it many time in the
FreeBSD mailing list, noone could help me and as well in my case all the
other people with XP1000 had my problem too.
Forget about IDE and get a good scsi disk, this was my solution.

Rick


On Mon, 7 Jul 2003, Felix Deichmann wrote:

> Hi,
>
> I have trouble using a Promise Ultra 100 TX2 in an AXPpci33 (with 2
> brand new IDE disks). The disks are downgraded to PIO mode 4. I did the
> following tests and changes already, without success:
>
> 1. Tried it with only one disk -> no success
> 2. Replaced the controller with another Ultra100 TX2 -> no success
> 3. Replaced the cables (I have 4 different 80 conductor) -> no success
> 4. Put the controller into another PCI slot -> no success
> 5. Switched the power supply with a more powerful one -> no success
> 6. Tested the disks with another computer in UDMA5 mode -> disks are OK
> 7. Upgraded from 1.6.1 kernel to current -> no success
>
> So, I don't know what the problem is... :-(
>
> dmesg follows (test with only one disk, but the other one is similar):
>
> - - -
>
> NetBSD 1.6U (FELIX) #0: Fri Apr  7 21:41:17 CEST 2023
>          root@alpha.invalid:/usr/current/src/sys/arch/alpha/compile/FELIX
> Alpha PC AXPpci33, 166MHz, s/n
> 8192 byte page size, 1 processor.
> total memory = 65536 KB
> (2024 KB reserved for PROM, 63512 KB used by NetBSD)
> avail memory = 56472 KB
> using 409 buffers containing 3272 KB of memory
> mainbus0 (root)
> cpu0 at mainbus0: ID 0 (primary), LCA-2 (21066)
>
> cpu0: Architecture extensions: fffffc000050e1d0<MVI>
> lca0 at mainbus0
> pci0 at lca0 bus 0
> pci0: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
> siop0 at pci0 dev 6 function 0: Symbios Logic 53c810 (fast scsi)
> siop0: interrupting at isa irq 11
> scsibus0 at siop0: 8 targets, 8 luns per target
> sio0 at pci0 dev 7 function 0: vendor 0x8086 product 0x0484 (rev. 0x03)
> tlp0 at pci0 dev 8 function 0: DECchip 21140A Ethernet, pass 2.2
> tlp0: interrupting at isa irq 9
> tlp0: Ethernet address 00:e0:29:06:b2:a7
> nsphy0 at tlp0 phy 3: DP83840 10/100 media interface, rev. 1
> nsphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
> tlp1 at pci0 dev 11 function 0: DECchip 21040 Ethernet, pass 2.3
> tlp1: interrupting at isa irq 10
> tlp1: ZNYX ZX312, Ethernet address 00:c0:95:ec:51:bd
> tlp1: 10baseT, 10baseT-FDX, 10base5, manual
> pciide0 at pci0 dev 12 function 0: Promise Ultra100TX2/ATA Bus Master
> IDE Accele
> rator (rev. 0x01)
> pciide0: bus-master DMA support present
> pciide0: primary channel configured to native-PCI mode
> pciide0: using isa irq 14 for native-PCI interrupt
> wd0 at pciide0 channel 0 drive 0: <Maxtor 6E040L0>
> wd0: drive supports 16-sector PIO transfers, LBA addressing
> wd0: 39205 MB, 16383 cyl, 16 head, 63 sec, 512 bytes/sect x 80293248 sectors
> wd0: 32-bit data port
> wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133)
> wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 5 (Ultra/100) (using
> DMA data
>   transfers)
> pciide0: secondary channel configured to native-PCI mode
> wd1 at pciide0 channel 1 drive 0: <Maxtor 6E040L0>
> wd1: drive supports 16-sector PIO transfers, LBA addressing
> wd1: 39205 MB, 16383 cyl, 16 head, 63 sec, 512 bytes/sect x 80293248 sectors
> wd1: 32-bit data port
> wd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133)
> wd1(pciide0:1:0): using PIO mode 4, Ultra-DMA mode 5 (Ultra/100) (using
> DMA data
>   transfers)
> isa0 at sio0
> lc0 at isa0 port 0x300-0x31f iomem 0xd0000-0xd07ff irq 5: DE205-AB
> lc0: address 08:00:2b:be:03:14, 128KB RAM, 2KB window
> com0 at isa0 port 0x3f8-0x3ff irq 4: ns16550a, working fifo
> com0: console
> com1 at isa0 port 0x2f8-0x2ff irq 3: ns16550a, working fifo
> pckbc0 at isa0 port 0x60-0x64
> lpt0 at isa0 port 0x3bc-0x3bf irq 7
> pcppi0 at isa0 port 0x61
> midi0 at pcppi0: PC speaker
> spkr0 at pcppi0
> isabeep0 at pcppi0
> fdc0 at isa0 port 0x3f0-0x3f7 irq 6 drq 2
> fd0 at fdc0 drive 0: 1.44MB, 80 cyl, 2 head, 18 sec
> mcclock0 at isa0 port 0x70-0x71: mc146818 or compatible
> Kernelized RAIDframe activated
> scsibus0: waiting 2 seconds for devices to settle...
> sd0 at scsibus0 target 2 lun 0: <IBM, DORS-32160, WA6A> disk fixed
> sd0: 2063 MB, 6703 cyl, 5 head, 126 sec, 512 bytes/sect x 4226725 sectors
> sd0: sync (100.00ns offset 8), 8-bit (10.000MB/s) transfers, tagged queueing
> wd0: transfer error, downgrading to Ultra-DMA mode 2
> wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2 (Ultra/33) (using
> DMA data
> transfers)
> wd0c: error reading fsbn 0 (wd0 bn 0; cn 0 tn 0 sn 0), retrying
> wd0: (aborted command, interface CRC error)
> wd0: soft error (corrected)
> wd1: transfer error, downgrading to Ultra-DMA mode 2
> wd1(pciide0:1:0): using PIO mode 4, Ultra-DMA mode 2 (Ultra/33) (using
> DMA data
> transfers)
> wd1c: error reading fsbn 0 (wd1 bn 0; cn 0 tn 0 sn 0), retrying
> wd1: (aborted command, interface CRC error)
> wd1: soft error (corrected)
> root on sd0a dumps on sd0b
> root file system type: ffs
> pciide0:0:0: lost interrupt
>          type: ata tc_bcount: 16384 tc_skip: 0
> pciide0:0:0: bus-master DMA error: status=0x22
> pciide0:0:0: bus-master DMA error: missing interrupt, status=0x22
> wd0: transfer error, downgrading to Ultra-DMA mode 1
> wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 1 (using DMA data
> transfers)
> wd0a: DMA error writing fsbn 80293216 of 80293216-80293247 (wd0 bn
> 80293216; cn
> 79655 tn 15 sn 31), retrying
> wd0: soft error (corrected)
> pciide0:0:0: lost interrupt
>          type: ata tc_bcount: 16384 tc_skip: 0
> pciide0:0:0: bus-master DMA error: status=0x22
> pciide0:0:0: bus-master DMA error: missing interrupt, status=0x22
> wd0: transfer error, downgrading to PIO mode 4
> wd0(pciide0:0:0): using PIO mode 4
> wd0a: DMA error writing fsbn 96 of 96-127 (wd0 bn 96; cn 0 tn 1 sn 33),
> retrying
> wd0: soft error (corrected)
>
> - - -
>
> Oh, and in PIO mode 4 the disks seem to work OK... :-)
>
> Help would be greatly appreciated
>
> Regards
>
> Felix
>
>
>
>