Path: utzoo!utgpu!water!watmath!clyde!cbosgd!ihnp4!homxb!houxj!billr
From: billr@houxj.UUCP (UNIX Group)
Newsgroups: comp.sys.mac
Subject: multi disks
Keywords: SCSI disk
Message-ID: <400@houxj.UUCP>
Date: 21 Jan 88 19:56:48 GMT
Organization: AT&T Bell Laboratories, Holmdel
Lines: 34

>Can one add a MacBottom SCSI to the back of a Jasmine 50? Successfully?? 8^)

I don't know if connector-wise it will work but I have connected
a warp9-photon30 to a LoDown20 to 2 homemade 106mb (adaptec controller,
fujitsu raw drives) and they all came up fine. 262+mb.. :-)
This was on a plus. 4.2 system 6.0 finder
Pretty loud but nice when they are all winding up...rrrrrRRRRRR!!
And what about backups? I never did it but I believe that would
be 140 or so floppies...
But this setup was just an experiment. Do others in net-land
have disk capacities in this range working? Will some limit get
hit somewhere? Bad blocks were also a pain. I found on the homemade
drives that I had to run many,many passes looking for bad/marginal
blocks before formatting and loading up the file systems. 
Also, it seems that if a bad block comes along later (I'm using the
SCSI driver/utilities that came with my warp9 drive) there is
no clean way to handle it..(backup,re-init,restore)
the file system just goes slowly insane. Lost directories,
"can't read" messages etc.
The adaptec controller knows about putting a pre-formatting
bad block list on the drive so the controller will remap on the
fly but as I said, this must all be done before the file system
is laid on the drive. Comments? As I just admitted (and I'll get
hung for this no doubt |-p ) is it legal for me to use the warp9
supplied driver/installer to run other home-built drives in MY
possession? I did buy the warp 9 drive w/driver and utilities. 
No license agreement was shipped with the drive pertaining to
the SCSI driver.

And another thing...I usually run with 1 106mb drive only and when I
return to the finder (especially when the application has deposited
a file with a new creator type) it seems to pound at the desktop
file for a long time...as much a 30 seconds or so.
Comments on this??