Drive Element Addressing Mode Configuration
20 SL150 Interface Reference Manual Julyl 2017
• A SCSI MODE SENSE command requesting the Element Address Assignment
page will end in Good status. The total number of data transfer elements reported
will include empty drive bays.
• A SCSI READ ELEMENT STATUS command that includes an empty drive slot
will end in Good status. The Data Transfer Element Descriptor data for the empty
drive slot will return the ED bit set to 1 (disabled) and an exception condition
indicating an Empty Drive Bay; the Except Bit will be set to 1, the ASC field will
be set to 3Bh, and the ASCQ field will be set to 1Ah.
• A SCSI MOVE command from an empty drive slot will end in Check Condition
Status. The sense data will indicate Illegal Request, Source Empty (Sense Key = 5h,
ASC = 3Bh, ASCQ = 0Eh).
• A SCSI MOVE command to an empty drive slot will end in Check Condition
Status. The sense data will indicate Illegal Request, Empty Drive Bay (Sense Key =
5h, ASC = 3Bh, ASCQ = 1Ah).
• A SCSI POSITION TO ELEMENT command to an empty drive slot will end in
Good Status. The robot will move in front of the empty drive bay.
Address Installed Drives Only
Setting the mode to Address Installed Drives Only results in the following:
• Only drives present at initialization are reported to a host application over the
library SCSI interface. If a new drive is added, the library must be rebooted before
the new drive can be used by a host application.
• Each installed drive is assigned a drive SCSI Element Address during library
initialization. Drive element addresses are assigned sequentially starting at 500 for
each partition from the topmost drive in the partition to the bottom drive in the
partition. Similarly, for non-partitioned libraries, drive element address are also
assigned sequentially starting at 500 from the top of the library to the bottom of
the library.
• A SCSI MODE SENSE command requesting the Element Address Assignment
page will end in Good status. The total number of data transfer elements reported
will include only the number of drives found to be present at initialization.
• If a drive is removed, a SCSI READ ELEMENT STATUS command for the now
empty drive slot will end in Good status. The Data Transfer Element Descriptor
data for the empty drive slot will return the ED bit set to 1 (disabled) and an
exception condition indicating a Tape Drive error; the Except Bit will be set to 1,
the ASC field will be set to 40h, and the ASCQ field will be set to 02h.
To Next Page
Loading...
Need help?
General