Subject: RE: SCSI network
To: Yubyub Bird <>
From: Roger Brooks <>
List: tech-kern
Date: 10/01/1999 13:32:29
On Fri, 1 Oct 1999, Yubyub Bird wrote:

>> -----Original Message-----
>> From: der Mouse [mailto:mouse@Rodents.Montreal.QC.CA]
>> Sent: Friday, October 01, 1999 2:09 AM
>> To:
>> Subject: SCSI network
>> I'm contemplating using SCSI interfaces as a networking medium.  Does
>> anyone have any thoughts on where I should look for (a) convincing a
>> machine that it should speak on other than ID 7
>And a second question: a year or two ago, I was working at a place where
>they had bunches of Sequent machines.  These machines could share disk packs
>connected only via scsi - no proprietary busses AFAIK.  Each machine was
>able to mount the same volume read/write.  What would be involved in doing
>this?  Is this just a filesystem feature, or is there a more complicated
>SCSI locking protocol which takes place?

Take a look at, which is a filesystem
which can be shared between two (or more?) Linux hosts on the same SCSI
bus.  It uses SCSI-3 features to store metadata locks in the RAM in each
disk, and the locks time out (so the filesystem doesn't hang if the host
holding a lock suddenly goes away).  Although this is being developed
under Linux, they're talking about porting it to other systems (including
*BSD) once it's reasonably stable.


Roger Brooks (Systems Programmer),          |  Email:
Computing Services Dept,                    |  Tel:   +44 151 794 4441
The University of Liverpool,                |  Fax:   +44 151 794 4442
PO Box 147, Liverpool L69 3BX, UK           |