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    ek> stray isa irq 14                                                               
    ek> wd0: transfer error, downgrading to Ultra-DMA mode 1                           
    ek> wd0(aceride0:0:1): using PIO mode 4, Ultra-DMA mode 1 (using DMA data transfers)
    ek> wd0a: DMA error reading fsbn 128 of 128-143 (wd0 bn 128; cn 0 tn 2 sn 2), retryg
    ek> stray isa irq 14; stopped logging                                              
    ek> wd0: soft error (corrected)

this may be related:

 http://mail-index.netbsd.org/port-alpha/2005/01/24/0000.html

It sounded like, on sparc64 there is MD code to manage the 'max
latency' pci register, while on alpha the SRM is expected to do it but
doesn't, and there are long-standing problems reported back to 2003
with IDE on alpha that might be related.

FWIW, whenever I reboot I get these:

tlp3: transmit underrun; new threshold: 96/256 bytes
tlp2: transmit underrun; new threshold: 96/256 bytes
tlp2: transmit underrun; new threshold: 128/512 bytes
tlp2: transmit underrun; new threshold: 160/1024 bytes
tlp3: transmit underrun; new threshold: 128/512 bytes
tlp3: transmit underrun; new threshold: 160/1024 bytes

These are a bunch of quad tulip PCI cards, four tulip chips behind a
PCI-PCI bridge.  I have nothing to suggest it's related to PCI max
latency besides that some of the same words were used in the thread
above.  I tried IDE on alpha once, and then switched to SCSI only
after seeing those degredation messages.  too many Linux boxes have
screwed me over by auto-degrading to some mode that no longer does
CRC, and then silently corrupting data, which everyone thinks is
completely impossible because they have RAID, until it happens,
completely blindsiding them.  anyway i'm rambling.

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