Strange disk messages in dmesg on OpenBSD 4.8/4.9 snapshot on a Sparcstation 20

[passthejoe]

I've been running OpenBSD on my Sun Sparcstation 20 for a couple of years now. It's the most stable and useful OS on this particular box.

I have had no problem up to OpenBSD 4.7, but when trying to install 4.8 and 4.9, I get this strange output in the dmesg about either the scsi disk controller and the hard drive and optical drive. When I run a dmesg, this is all I get (this is the content of dmesg.boot):

: timed out [ecb 0xf91ac000 (flags 0x1, dleft 20, stat 0)], <state 2, nexus 0xf91ac000, phase(l 3, c 3, p 101), resid 0, msg(q 20,o 0) >
sd0(esp0:3:0): timed out [ecb 0xf91ac000 (flags 0x41, dleft 20, stat 0)], <state 2, nexus 0xf91ac000, phase(l 3, c 3, p 101), resid 0, msg(q 20,o 0) > AGAIN
(esp0:3:0): selection failed; 0 left in FIFO [intr 18, stat 83, step 3]
sd0(esp0:3:0): timed out [ecb 0xf91ac000 (flags 0x1, dleft 20, stat 0)], <state 2, nexus 0xf91ac000, phase(l 3, c 3, p 3), resid 0, msg(q 20,o 0) >
sd0(esp0:3:0): timed out [ecb 0xf91ac000 (flags 0x41, dleft 20, stat 0)], <state 2, nexus 0xf91ac000, phase(l 3, c 3, p 3), resid 0, msg(q 20,o 0) > AGAIN
(esp0:3:0): selection failed; 0 left in FIFO [intr 18, stat 83, step 3]
sd0(esp0:3:0): timed out [ecb 0xf91ac000 (flags 0x1, dleft 20, stat 0)], <state 2, nexus 0xf91ac000, phase(l 3, c 3, p 101), resid 0, msg(q 20,o 0) >
sd0(esp0:3:0): timed out [ecb 0xf91ac000 (flags 0x41, dleft 20, stat 0)], <state 2, nexus 0xf91ac000, phase(l 3, c 3, p 101), resid 0, msg(q 20,o 0) > AGAIN
(esp0:3:0): selection failed; 0 left in FIFO [intr 18, stat 83, step 3]
sd0(esp0:3:0): timed out [ecb 0xf91ac000 (flags 0x1, dleft 20, stat 0)], <state 2, nexus 0xf91ac000, phase(l 3, c 3, p 101), resid 0, msg(q 20,o 0) >
sd0(esp0:3:0): timed out [ecb 0xf91ac000 (flags 0x41, dleft 20, stat 0)], <state 2, nexus 0xf91ac000, phase(l 3, c 3, p 101), resid 0, msg(q 20,o 0) > AGAIN
(esp0:3:0): selection failed; 0 left in FIFO [intr 18, stat 83, step 3]
sd0(esp0:3:0): timed out [ecb 0xf91ac000 (flags 0x1, dleft 20, stat 0)], <state 2, nexus 0xf91ac000, phase(l 3, c 3, p 101), resid 0, msg(q 20,o 0) >
sd0(esp0:3:0): timed out [ecb 0xf91ac000 (flags 0x41, dleft 20, stat 0)], <state 2, nexus 0xf91ac000, phase(l 3, c 3, p 101), resid 0, msg(q 20,o 0) > AGAIN
(esp0:3:0): selection failed; 0 left in FIFO [intr 18, stat 83, step 3]
sd0(esp0:3:0): timed out [ecb 0xf91ac000 (flags 0x1, dleft 20, stat 0)], <state 2, nexus 0xf91ac000, phase(l 3, c 3, p 101), resid 0, msg(q 20,o 0) >
sd0(esp0:3:0): timed out [ecb 0xf91ac000 (flags 0x41, dleft 20, stat 0)], <state 2, nexus 0xf91ac000, phase(l 3, c 3, p 101), resid 0, msg(q 20,o 0) > AGAIN
(esp0:3:0): selection failed; 0 left in FIFO [intr 18, stat 83, step 3]
sd0(esp0:3:0): timed out [ecb 0xf91ac000 (flags 0x1, dleft 20, stat 0)], <state 2, nexus 0xf91ac000, phase(l 3, c 3, p 3), resid 0, msg(q 20,o 0) >
sd0(esp0:3:0): timed out [ecb 0xf91ac000 (flags 0x41, dleft 20, stat 0)], <state 2, nexus 0xf91ac000, phase(l 3, c 3, p 3), resid 0, msg(q 20,o 0) > AGAIN
(esp0:3:0): selection failed; 0 left in FIFO [intr 18, stat 83, step 3]
sd0(esp0:3:0): timed out [ecb 0xf91ac000 (flags 0x1, dleft 20, stat 0)], <state 2, nexus 0xf91ac000, phase(l 3, c 3, p 101), resid 0, msg(q 20,o 0) >
sd0(esp0:3:0): timed out [ecb 0xf91ac000 (flags 0x41, dleft 20, stat 0)], <state 2, nexus 0xf91ac000, phase(l 3, c 3, p 101), resid 0, msg(q 20,o 0) > AGAIN
(esp0:3:0): selection failed; 0 left in FIFO [intr 18, stat 83, step 3]
sd0(esp0:3:0): timed out [ecb 0xf91ac000 (flags 0x1, dleft 20, stat 0)], <state 2, nexus 0xf91ac000, phase(l 3, c 3, p 101), resid 0, msg(q 20,o 0) >
sd0(esp0:3:0): timed out [ecb 0xf91ac000 (flags 0x41, dleft 20, stat 0)], <state 2, nexus 0xf91ac000, phase(l 3, c 3, p 101), resid 0, msg(q 20,o 0) > AGAIN
(esp0:3:0): selection failed; 0 left in FIFO [intr 18, stat 83, step 3]
sd0(esp0:3:0): timed out [ecb 0xf91ac000 (flags 0x1, dleft 20, stat 0)], <state 2, nexus 0xf91ac000, phase(l 3, c 3, p 101), resid 0, msg(q 20,o 0) >
sd0(esp0:3:0): timed out [ecb 0xf91ac000 (flags 0x41, dleft 20, stat 0)], <state 2, nexus 0xf91ac000, phase(l 3, c 3, p 101), resid 0, msg(q 20,o 0) > AGAIN
(esp0:3:0): selection failed; 0 left in FIFO [intr 18, stat 83, step 3]
sd0(esp0:3:0): timed out [ecb 0xf91ac000 (flags 0x1, dleft 20, stat 0)], <state 2, nexus 0xf91ac000, phase(l 3, c 3, p 101), resid 0, msg(q 20,o 0) >
sd0(esp0:3:0): timed out [ecb 0xf91ac000 (flags 0x41, dleft 20, stat 0)], <state 2, nexus 0xf91ac000, phase(l 3, c 3, p 101), resid 0, msg(q 20,o 0) > AGAIN

The system appears to run, but both the installation and boot of the system take much longer due to these messages cycling for so long.

I also couldn't get the installation sets off of the CD - I had to use FTP.

I've burned multiple CDs, and it's not the media. The messages persist on the running system. When I load and run OpenBSD 4.4 through 4.7, none of these messages appear. It's just 4.8 and the 4.9 snapshot I pulled a couple days ago.

Does anybody have an idea what this means?