On Fri, 6 Dec 1996, Matthew Pritzker wrote:

> I have SCSIProbe open right now and here's what it shows:
> 
> SCSI#0  Quantum HD (my MacOS drive)
> SCSI#1
> SCSI#2
> SCSI#3  NEC CD-ROM
> SCSI#4  NEC CD-ROM
> SCSI#5  Zip Drive
> SCSI#6  Quantum HD (my NetBSD drive)
> SCSI#7  Macintosh IIsi
> 
> I assume 0 is sd0, 3 is sd1, 4 is sd2, 5 is sd3, and 6 is sd4.

Not really.  0 is sd0, 3 is cd0, 4 is cd1, 5 is sd1 and 6 is sd2.

So, try fsck'ing /dev/rsd2a.

There was a bug in earlier versions of the installer that incorrectly 
counted CDs as sd devices (like you did) and then erroneously built the 
wrong set of things in /dev.  If that's the case, you can use 
/etc/MAKEDEV (I _think_ it's all caps!) to build the right stuff.