MEDIA CHANGER COMMANDS

M2488 PRODUCT GUIDE

6-2.1.3 EXCHANGE MEDIUM Sense Keys

One of the following sense keys may be returned if a CHECK CONDITION was indicated:

SENSE KEY

CONDITION

 

DESCRIPTION

 

 

 

2h

NOT READY

Logical Unit is not ready (magazine not set or if set, then START button

 

 

not pressed or magazine not loaded via host command).

3h

MEDIUM ERROR

1. Medium exchange failed due to synchronization failure.

 

 

2.

An attempt was made to write 36-track data on 18-track formatted

 

 

 

medium.

4h

HARDWARE ERROR

Medium exchange failed due to hardware failure.

5h

ILLEGAL REQUEST

1. If this command is received and the XCL (ACL or FACL) is not

 

 

 

attached, the target shall return CHECK CONDITION status and set

 

 

 

the sense key to ILLEGAL REQUEST.

 

 

2.

If this command is received and the XCL (ACL or FACL) is not in

 

 

 

SYSTEM MODE, the target shall return CHECK CONDITION sta-

 

 

 

tus and set the sense key to ILLEGAL REQUEST.

 

 

3.

If this command is received and the source element is empty or the

 

 

 

first destination element is empty, or the second destination element

 

 

 

(if different from the source element) is full, or the second destination

 

 

 

element (if the same as the source element) is empty, the target shall

 

 

 

return CHECK CONDITION status and set the sense key to ILLE-

 

 

 

GAL REQUEST.

 

 

4.

The transport element address specifies the medium transport element

 

 

 

that is to be used in executing this command. The default transport

 

 

 

element address of zero may be used if this functionality is supported

 

 

 

by the medium changer device. If the transport element address speci-

 

 

 

fied has not been assigned or has been assigned to an element other

 

 

 

than a medium transport element, the target shall return CHECK

 

 

 

CONDITION status and the set the sense key to ILLEGAL

 

 

 

REQUEST.

 

 

5. If this command is received and the source, first destination, or second

 

 

 

destination addresses are not valid element addresses, the target shall

 

 

 

return CHECK CONDITION status and the set the sense key to

 

 

 

ILLEGAL REQUEST.

 

 

6.

If the device is an ACL and the source and second destination

 

 

 

addresses are the same (simple exchange), the target shall return

 

 

 

CHECK CONDITION status and the set the sense key to ILLEGAL

 

 

 

REQUEST.

 

 

7.

Reserved bit was found set in the CDB.

 

 

8.

The Flag bit was set but the Link bit was not set.

6h

UNIT ATTENTION

Indicates the EXCHANGE MEDIUM command was not performed due

 

 

to one of the following:

 

 

1. A NOT READY TO READY transition has occurred.

 

 

2.

The target has been reset.

 

 

3.

The Mode parameters have been changed by another initiator.

 

 

4.

The version of the microcode has been changed (microcode down-

 

 

 

loaded).

 

 

5.

A cartridge was loaded with a tape length that is too long or too short.

6-4

CG00000-011503 REV. A

March 1997

Page 264
Image 264
Fujitsu M2488 manual Exchange Medium Sense Keys, GAL Request