M2488 PRODUCT GUIDE
MEDIA CHANGER COMMANDS
March 1997
CG00000-011503 REV. A
6-29
6-2.5.3
Source and Destination Elements
Table 6-33 shows when an element is allowed to be source or destination for a MOVE MEDIUM
or EXCHANGE MEDIUM command based upon the element’s Full and Access status bits.
6-2.5.4
READ ELEMENT STATUS Sense Keys
One of the following sense keys may be returned if a CHECK CONDITION was indicated:
a. Only if the Second destination element is different from the Source element.
b. Only if the Second destination element is the same as the Source element.
Table 6-33. Allowed Source and Destination Elements
ELEMENT
ACCESS
STATUS
ELEMENT
FULL
STATUS
ALLOWED
AS SOURCE
ELEMENT
ALLOWED AS
DESTINATION
ELEMENT FOR
MOVE MEDIUM
ALLOWED AS
FIRST
DESTINATION
ELEMENT FOR
EXCHANGE
MEDIUM
ALLOWED AS
SECOND
DESTINATION
ELEMENT FOR
EXCHANGE
MEDIUM
0
0
N
N
N
N
0
1
N
N
N
N
1
0
N
Y
N
Y
a
1
1
Y
N
Y
Y
b
SENSE KEY
CONDITION
DESCRIPTION
5h
ILLEGAL REQUEST
1.Reserved bit was found set in the CDB of the READ ELE-
MENT STATUS command.
2. Illegal value used in Element type code field of the CDB.
3. The Flag bit was set but the Link bit was not set.
6h
UNIT ATTENTION
Indicates the READ ELEMENT STATUS command was not per-
formed due to one of the following:
1. A NOT READY TO READY transition has occurred.
2. The target has been reset.
3. The Medium-changer Mode parameters have been changed by
another initiator.
4. The version of the microcode has been changed (microcode
downloaded).
5. A cartridge was loaded with a tape length that is too long or too
short.
Bh
ABORTED COMMAND
READ ELEMENT STATUS command was aborted. The READ
ELEMENT STATUS command can be reissued.
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