Partitioning—Feature
36
SL150 Systems Assurance
July 2012
Partitioning—Shared Mailslot Behavior
When the library is partitioned, the mailslots are shared between the two partitions.
When a partition needs access to the mailslots, the operator must use the ASSIGN
action in the user interface to assign the partition to the mailslots before initiating an
import or export operation. Refer to the SL150 Users Guide for help.
A Partition-Mailslot assignment gives a partition exclusive ownership of the shared
mailslot. This ensures that cartridges are always entered into the correct partition and
prevents the other partition from taking ownership of a shared mailslot that is
already in use.
If the mailslot is not assigned to the partition, a SCSI host connected to the partition
will receive a status indication from the library that the mailslot is open. When a SCSI
host receives status that the mailslot is open, the application will let the operator
close the mailslot or ASSIGN the mailslot to the partition. The following SCSI
commands will return mailslot open status when the mailslot is not assigned to the
mailslot or when the mailslot is actually open:
• A SCSI MOVE command to or from a mailslot element. The command will end in
Check Condition Status. The sense data will indicate Not Ready, Mailslot Open
(Sense Key = 2h, ASC = 3Ah, ASCQ = 02h).
• A SCSI READ ELEMENT STATUS command that includes the mailslot elements.
The command will end in GOOD status. The Import/Export Element Descriptor
data for the mailslot element will return an exception condition indicating that the
mailslot is open; the Except Bit will be set to 1, the ASC field will be set to 3Ah,
and the ASCQ field will be set to 02h.
7. Mailslots
8. Left magazine front
9. Right magazine front
10. Module 10 (Expansion)
11. Partition 1 resource
12. Partition 2 resource
13. Shared resource
14. Reserved slots (configurable, shared resource)
FIGURE B-1
Partitioned SL150 Library (Continued)
Содержание StorageTek SL150
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