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From: kaufman@neon.Stanford.EDU (Marc T. Kaufman)
Newsgroups: comp.periphs.scsi
Subject: Re: WARM SWAP
Message-ID: <1991Apr22.161413.25465@neon.Stanford.EDU>
Date: 22 Apr 91 16:14:13 GMT
References: <22249@shlump.nac.dec.com>
Organization: Computer Science Department, Stanford University, Ca , USA
Lines: 17

In article <22249@shlump.nac.dec.com> guineau@star.enet.dec.com (W. John Guineau) writes:

>Open question with no personal opinions:

>Is anyone using SCSI devices in a WARM SWAP mode? 
>WARM SWAP: everything powered on, NO activity on bus, peripherals swapped.

>What are the risks associated with this?

In my experience, the most common problem is mating the SCSI cable to the
connector.  Often, people angle the connectors to get them to mate at one
end first before seating them.  This can cause adjacent lines to short
together.  In the case of signal lines, the host or a peripheral may see an
unwanted command (such as bus reset).  In the cast of the trmPwr line, you
may blow the fuse (as happens on Macs).

Marc Kaufman (kaufman@Neon.stanford.edu)