Oh well,
  Happened again last night. The first time it happened around 7:20am, this
 time at 1:10am. Nothing running at the time.
 Any ideas? I'm planning a 1.6 upgrade anyhow. So, if that is the fix, so be
 it :)

 Chris

 isp0: Mailbox Command 'ABORT' failed (TIMEOUT)
isp0: Polled Mailbox Command (0x15) Timeout
isp0: Mailbox Command 'ABORT' failed (TIMEOUT)
raid0: IO Error. Marking /dev/sd3a as failed.
raid0: node (Rod) returned fail, rolling backward
raid0: DAG failure: w addr 0x17b0a0 (1552544) nblk 0x10 (16) buf
 0xfffffe00011f2000
isp0: Polled Mailbox Command (0x15) Timeout
isp0: Mailbox Command 'ABORT' failed (TIMEOUT)
raid0: IO Error. Marking /dev/sd1a as failed.
raid0: node (Rod) returned fail, rolling backward
isp0: Polled Mailbox Command (0x15) Timeout
isp0: Mailbox Command 'ABORT' failed (TIMEOUT)
raid0: node (Rod) returned fail, rolling backward
raid0: DAG failure: w addr 0x17b090 (1552528) nblk 0x2 (2) buf
 0xfffffe0001812000
Multiple disks failed in a single group! Aborting I/O operation.
Multiple disks failed in a single group! Aborting I/O operation.
Multiple disks failed in a single group! Aborting I/O operation.
Multiple disks failed in a single group! Aborting I/O operation.
[Failed to create a DAG]
panic: raidframe error at line 455 file
 ../../../../dev/raidframe/rf_states.c
Stopped in raid at cpu_Debugger+0x4: ret zero,(ra)
db> trace
cpu_Debugger() at cpu_Debugger+0x4
panic() at panic+0xfc
rf_State_CreateDAG() at rf_State_CreateDAG+0x224
rf_ContinueRaidAccess() at rf_ContinueRaidAccess+0xdc
rf_ContinueDagAccess() at rf_ContinueDagAccess+0x22c
DAGExecutionThread() at DAGExecutionThread+0x1cc
esigcode() at esigcode
--- root of call graph ---
db>