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Using Labeled Tapes
Understanding Tape Mount Requests
When a job is ready to run in LP mode, $ZSVR sends a tape mount request to the
operator console in the format:
$ZSVR: seq MOUNT [labeltype] vid [REEL reel]
[DENSITY density] [ON $tape]
{WITH RING | NO RING} [comment]
Requests to mount scratch tapes are displayed in the format:
$ZSVR: seq MOUNT [IBM] SCRATCH TAPE [REEL reel]
When you receive a message of either type, you respond to it by mounting a labeled tape
according to the message elements:
seq
is the four-digit message sequence number that identifies this mount request. This
number is used in the MEDIACOM REJECT TAPEMOUNT and STATUS
TAPEMOUNT commands.
labeltype
asks for an IBM-standard labeled tape or a TMF tape. If labeltype is omitted,
the request is assumed to be for an ANSI-standard labeled tape.
vid
is the volume serial number.
reel
is a number from 1 through 255 that specifies the particular reel for a tape file that
extends over multiple volumes.
density
is either 1600 or 6250 bits per inch.
$tape
is the tape drive name in the system, displayed if you specify "device" in the tape
DEFINE, or if the mount message is for a continuation volume of a multivolume
operation. In this case, the tape drive used for the previous tape volume is named in
the mount message and is the only drive that can be used for continuation volumes.
WITH RING | NO RING
WITH RING indicates that the tape should be write-enabled; NO RING indicates
that the tape should be write-protected.
[DENSITY density]
[ON $tape] WITH RING [comment]
Guardian User's Guide —425266-001
10 -18
Responding to Messages and Requests
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