home *** CD-ROM | disk | FTP | other *** search
- Path: news.delphi.com!usenet
- From: jdow@BIX.com (Joanne Dow)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: More than one SCSI adaptor on the SCSI bus?
- Date: 4 Feb 1996 03:53:55 GMT
- Organization: Delphi Internet Services Corporation
- Message-ID: <4f1akj$1rt@news2.delphi.com>
- References: <DLzt6x.Mpt@uns.bris.ac.uk> <641.6605T995T255@academy.bastad.se>
- Reply-To: jdow@BIX.com (Joanne Dow)
- NNTP-Posting-Host: bix.com
- X-Newsreader: NetBix 1.250
- X-Newsreader-Author: lwilton@BIX.com (Loren Wilton)
- This message has been posted with development version software.
- If there are any problems with the message format, send me mail.
-
- In article <641.6605T995T255@academy.bastad.se>,
- anderse@academy.bastad.se (Anders Erlandsson) wrote:
- >
- >C. Dew wrote about More than one SCSI adaptor on the SCSI bus?:
- >>I remember hearing a while ago that it was possible to put two or more scsi
- >>controllers on one scsi bus, so that scsi devices would be local to all
- >
- >You mean SCSI network? I had a Grandslam2000 before and there was
- >examples in the manual how to do it. What i have heard not all controllers
- >allow SCSI network. I never tried it.
-
- Only very lucky people should try it. Unlucky people may want to try it if they
- are very VERY tolerante of running disk repair programs and losing data.
-
- It is entirely possible to connect 7 controllers and one drive on a SCSI bus.
- (This has been done for a "classroom" setting with all but one system running
- with the drive locked for writes. That is safe - mostly.)
-
- The big problem here is that the Amiga filesystems are flat out not prepared to
- deal with such a configuration safely. If you write to a partition from one
- machine and do not perform a diskchange that works on all other machines
- attached to that filesystem and one of those other machines for ANY reason
- writes to that drive you have a mess on your hands. It is not really worth the
- aggravation.
-
- One further note - only controllers that can alter their SCSI IDs can be used in
- this manner. *EVERY* device, controller or drive or scanner or whatever, on a
- given SCSI bus *MUST* have a unique ID on that bus.
-
- I very strongly recommend that this SCSI networking trick NOT be used unless you
- REALLY enjoy headaches.
-
- >---------------------------------------------------------------------
- >anderse@academy.bastad.se Anders Erlandsson
- >
- >HTTP://www.bastad.se/~anderse/index.html
- >---------------------------------------------------------------------
-
- {^_^} Joanne Dow, Amiga Exchange Editor on BIX, aka The Wizardess
- jdow@bix.com, jdow@delphi.com, jdow@mci.newscorp.com
-
-