25
SCSI SWITCH (FOR AS/400
®
)
Table 4-3 (continued). Results of Manual Switch Changes.
Position Change
What Happens
Host B to Auto
If...
Then...
• Host B has varied off the
• Host B relinquishes tape
tape drive
drive ownership.
• Host A has not varied off
• Host A “owns” the drive.
the tape drive
• Ownership is relinquished
• Either host can arbitrate
for the tape drive.
Host A to Host B
Host B is granted tape ownership; Host A’s host interface is
reset and Host A’s process is aborted.
If...
Then...
A command is executing
It will be driven to bus free.
on Host A
Host A’s AS/400 process will
end with an error condition.
Host B to Host A
Host A is granted tape ownership; Host B’s host interface is
reset and Host B’s process is aborted.
If...
Then...
A command is executing on
It will be driven to bus free.
Host B
Host B’s AS/400 process will
end with an error condition.