I have a Microvax II machine with two ra81 disks and i get this
messages:

Jan 18 23:42:51 fosila /netbsd: ra1: drive 1 soft error datagram (continuing): unit 1: lbn 0: drive error (drive detected error) (code 11, subcode 7)
Jan 18 23:42:52 fosila /netbsd: 	sdi uproc error code 0x39, front panel code 0x1a
Jan 20 19:30:37 fosila /netbsd: ra0: drive 0 soft error datagram (continuing): unit 0: lbn 0: drive error (sdi command timeout) (code 11, subcode 1)
Jan 20 19:30:44 fosila /netbsd: 	sdi uproc error code 0x0, front panel code 0x0

	I don't know what to do. This machine went down twice because of
this problem with the disks. In this situation if the machine goes off, 
next time when I boot it when fsck starts it doesn't see the tree and the
system and I'm forced to reinstall the system again.
	Does anyone have an ideea why i get this ... I'm bored to do that 
again and again ... forever?

Thanks!