Folks,

I replaced an NCR SCSI controller in an 1.3.3 i386 box with an Adaptec
1542B, and now I get the magic "no operating system" message.  1.3.3 was
installed by sysinst, and the netbsd partition starts at the 63rd sector
(there no other O/Ss involved).

Using fdisk off a 1.4.1 install floppy, I'm told that the NetBSD
geometry is 173c/48h/495s and the BIOS geometry is 4077c/16h/63s.  The
actual geometry reported by the install kernel is 3045c/16h/84c.  I've
tried a few different incantations of fdisk, and installed the 1.4.1
bootblocks but to no avail.  ISTR that Adaptecs do something funny with
the geometry, but couldn't find anything useful in the mailling list
archives.

Even though I'm planning an upgrade to 1.4.1, I'd rather not blow
everything away.  I've got backups, but it seems there should be a less
painful way...

Simon.