rl%d: operation incomplete
The current command to the disk did not complete within the timeout period. This may be due to hardware failure or a heavily loaded UNIBUS.
rl%d: read data CRC
The controller detected a CRC error on data read from the disk. Probably a bad disk pack.
rl%d: header CRC
The controller detected a CRC error on header data read from the disk. Probably a bad disk pack.
rl%d: data late
The controller was not able to transfer data over the bus fast enough to not overflow/underflow the internal FIFO, probably because a heavily loaded UNIBUS or mis-ordered UNIBUS devices.
rl%d: header not found
The requested sector was not found before the timer expired. If this error is the only error then it may indicate a software bug.
rl%d: non-existent memory
The controller tried to do DMA to/from a non-mapped address. This is a software bug.
rl%d: memory parity error
The host memory data sent had a parity error. This is a hardware failure.