HP Surestore 80fx Optical Drive and Library SCSI-2 Command Reference - Page 257
Read Element Status Command B8H, Element Type Code 1H - Picker
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Jukebox SCSI-2 Command Set Read Element Status Command (B8H) Table 3-72 Element Type Code 1H - Picker Medium Transport Element Descriptor Block Byte 0 1 2 3 4 5 6 7 8 9 10 11 7 6 5 4 3 2 1 0 Element Type Code (1H) Reserved (0) Element Descriptor Length (MSByte) Element Descriptor Length (LSByte) Reserved (0) Byte Count of Descriptor Data Available (MSByte) Byte Count of Descriptor Data Available (Middle Byte) Byte Count of Descriptor Data Available (LSByte) Element Address (MSByte) Element Address (LSByte) Reserved (0) Except Reserved Full (0) Reserved (0) Element Descriptor Length The number of bytes in each Element Descriptor Block Byte Count of Descriptor Data Available Element Descriptor Length for X Number of Elements of the type shown in byte 0. Element Address The address of the element being reported by this descriptor block. Except When set to 1, the element is in an abnormal state. Full When set to 1, the element contains a cartridge. 3-70 Chapter 3