On Thu, 12 Feb 1998, Rick Copeland wrote:

> sd0 at scsibus0 targ 0 lun 0: <MAXTOR, LXT-213S SUN0207, 4.24> SCSI1 0/direct
> sd0: 202MB, 1310 cyl, 7 head, 45 sec, 512 bytes/sec

This message shows that your drive claims that it has 412650 data blocks.
However, the error message you posted

  sd0(esp0:0:0): illegal request, data = 00 00 f8 55 21 c0 01 e0 00 00
  write error: 412648
  wtfs: Invalid argument

seems similar to the error that a drive raises when it is asked to address
blocks outside of its capacity.  The fact that it occurs just 2 blocks
before the supposed end of the disk suggests that your disk may be lying a
little about its size.  It could also be due to a bad set of blocks in
that area.  The problem may go away if you shorten the length of your
``e'' partition.  (If you encounter further problems, it would be helpful
if you posted your partition layout.) 

-J