Fujitsu M2488 manual Read Element Status Field Description, Element Type Codes

MEDIA CHANGER COMMANDS M2488 PRODUCT GUIDE

		Table 6-17. READ ELEMENT STATUS Field Description
BYTE	BIT	VALU	DESCRIPTION
		E
0	0-7	B8h	Operation code.
1	0-3		The Element type code field specifies an element type; element descriptors are only
			returned for those elements that are of the same type as specified by this field.
			Table 6-18 shows the codes used for the Element type code field. The special value 0h
			can be used in the Element type code field when element descriptors for all element
			types are to be reported. If any reserved value (05h to 0Fh) is used in the Element type
			code field, then no data is sent and CHECK CONDITION status will be reported. The
			sense data for this error will contain a sense key of ILLEGAL REQUEST.
2-3			The Starting element address field specifies a minimum element address; element
			descriptors are only returned for those elements with addresses greater than or equal
			to the value in this field. The defined element addresses for the Flush-Mount Car-
			tridge Loader (FACL) and Automatic Cartridge Loader (ACL) are shown in Table 6-
			19
4-5			The Number of elements field specifies a maximum number of element descriptors to
			be reported. If the set of element descriptors to be reported as defined by the Element
			type code field and Starting element address field contains more element descriptors
			than are allowed to be reported by the Number of elements field then only a subset of
			these element descriptors will be reported. Which elements are chosen for this subset
			is not specified.
7-9			The Allocation length field describes the maximum number of bytes that are to be
			transferred for the READ ELEMENT STATUS command. If the allocation length is
			not sufficient to transfer all element descriptors to be reported then the target transfers
			as many bytes as possible stopping at the end of a full element descriptor. It is not
			considered an error if the value in the Allocation length field is zero or is not suffi-
			cient to transfer all element descriptors to be reported.
			Given a sufficient allocation length, element descriptors will be reported for all
			defined elements if the Element type code is 0h, the Starting element address is 0 and
			the Number of elements is FFFFh.
			All reserved fields of the CDB should be set to 0. If any reserved field is set to a non-
			zero value then CHECK CONDITION status is reported. The sense data for this error
			will contain a sense key of ILLEGAL REQUEST.

Table 6-18. Element Type Codes

CODE	DESCRIPTION
0h	All element types reported
1h	Medium Transport Element
2h	Storage Element
3h	Import Export Element
4h	Data Transfer Element
5h-Fh	Reserved

6-20 CG00000-011503 REV. A March 1997