User manual FREECOM AIT-SDX460

[. . . ] SDX-460V/P SDX-460V/RP 5. 25"Model Product Specification Manual Version 1. 0 Sep. 2004 Copyright © 2004, Sony Corporation. NOTE: This Product Specification Manual is applicable for AIT-1 Turbo ATAPI I/F drive. Notice This document contains proprietary information which is protected by copyright. No part of this document may be photocopied, reproduced or translated to another language without prior written consent of Sony. [. . . ] This field is not supported and should be always set to 00b. RED Value 00b Description The SDX-460V will return a CHECK CONDITION status (MEDIUM ERROR) whenever data is encountered on the media that the drive cannot decompress. The SDX-460V will not return a CHECK CONDITION status at a boundary condition as long as the data is uncompressed or ALDC1 compressed. The drive shall return a CHECK CONDITION status whenever a boundary condition is encountered on the medium. The boundary conditions are from: uncompressed to compressed or compressed to uncompressed CHECK CONDITION will be reported on the boundary condition even if the drive supports hardware decompression. For any of the boundary conditions which result in a CHECK CONDITION status, the additional sense code shall be set to either DECOMPRESSION EXCEPTION, ALGORITHM ID OF NN. The drive will set the decompression algorithm field to the algorithm identifier of the compression algorithm used to process the encountered data. The device shall be positioned on the EOP side of the encountered data, and the command-specific information field in the sense data shall contain a count of the number of data blocks contained within the encountered data. Note: When compressed data is encountered on the medium which the device cannot decompress, the device should treat the data as a single variable-length record. In the sense data, the valid bit, the ILI bit and the information field should be set accordingly. A RED field of 11b is undefined. 01b 10b 11b Compression Algorithm: The compression algorithm field indicates the compression algorithm the drive will use to process data sent to it by the initiator (if the DCE bit is one). The SDX-460V supports the ALDC1 data compression algorithm which is identified by the value: 00 00 00 03h in the compression algorithm field. A value of ZERO shall indicate that no compression algorithm is currently selected. Any other values in this field will cause the drive to return a CHECK CONDITION status the sense key shall be set to ILLEGAL REQUEST. Decompression Algorithm: For MODE SELECT the decompression algorithm field indicates the decompression algorithm selected by the initiator for use in subsequent decompression of data encountered on the medium. The SDX-460V can decompress data recorded with the ALDC1 algorithm therefore this field can be set to 00 00 00 03h. However, the SDX-460V is capable of automatic recognition of the compression algorithm used to process the data encountered on the medium. Therefore, the drive will override the value in the decompression field (if is set to ZERO) for a subsequent read operation when ALDC1 compressed data is detected on the media. SONY AIT-1Turbo drive SDX-460V series Ver. 1. 0 7-35 7. ATAPI Packet Command Specification MODE SENSE A CHECK CONDITION will occur on the transition from uncompressed to compressed if RED = 10b. For the MODE SENSE command, the decompression algorithm field reflects either the algorithm selected by the initiator or compression algorithm which was used to process the data most recently encountered on the medium, during a read operation. A value of ZERO shall indicate that the data encountered on the medium during the most recent read operation was uncompressed. 7. 8. 3. Device Configuration Page 10h The drive supports the Device Configuration Page which has the following format: Table 7-38: MODE PAGE Device Configuration (10h) Bit Byte 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 7 PS(0) Reserved 6 Reserved CAP CAF 5 4 3 2 1 0 (MSB) DBR(0) BIS(1) EOD Defined (000b) (MSB) RSmk Page Code (10h) Page Length (0Eh) Active Format Active Partition Write Buffer Full Ratio (00h) Read Buffer Empty Ratio (00h) Write Delay Time AVC(0) SOCF(00b) Gap Size (00h) EEG(1) SEW Buffer Size at Early Warning (00 00 00h) (LSB) Select Data Compression Algorithm Reserved RBO(0) Reserved (LSB) REW CAP: The Change Active Partition bit, when set to one, indicates that the partition is changed to the one specified by the Active Partition Field. This is a feature supported by the drive and is discussed below. CAF: The Change Active Format bit, set to one, indicates that the active format is to be changed to that set in the Active Format Field. [. . . ] The Accumulative System Log in MIC is saved, even if the cassette is re-initialized. MIC cassettes may be re-initialized in either the DDS mode or the AIT mode. The drive treats MIC cassettes with unreadable MIC as non-MIC media. SONY AIT-1 Turbo drive SDX-460V series Ver. 1. 0 16-1 16. LOADING/UNLOADING The AIT cassette; 3 partitioned, Ejected cassette. [. . . ]