SE LVD Hot Swap
Gerry Johnsen
gerry at ciprico.com
Wed Oct 16 10:49:09 PDT 1996
* From the SCSI Reflector (scsi at symbios.com), posted by:
* Gerry Johnsen <gerry at ciprico.com>
*
Maybe I am misinterpeting something but it appears to me there is a
more serious problem with hot swapping SE devices on a active LVD bus
then the state of the diff sense line. When the SE device is attached
it will immediatly tie all +signal lines (+DB0-+DB16, +REQ, +ACK, ect)
to ground. This will halt any current LVD activity in progress and
prevent any successful bus activity until the whole bus switches to
SE.
Due to the complexities in implimenting case 4 hot swap between LVD
and SE devices I would recommend it is outside the scope of SPI-2 and
only addressed in future proposals if a market need is identified.
Gerry Johnsen Ciprico Inc
voice (612)551-4000 The Disk Array Company
fax (612)551-4002 2800 Campus Drive
gerry at ciprico.com Plymouth, MN 55441
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