User manual QUANTUM 818500101

[. . . ] SDLT 220 and SDLT 320 SCSI Interface Guide SDLT 220 and SDLT 320 SCSI Interface Guide Copyright Copyright © 2004 by Quantum Corporation. Document Origination: Boulder, Colorado, USA. Trademarks Quantum, the Quantum logo, and the DLTtape logo are trademarks of Quantum Corporation registered in the U. S. A. DLTtape, DLTSage, and Super DLTtape are trademarks of Quantum Corporation. Other company and product names used in this document are trademarks, registered trademarks, or service marks of their respective owners. Legal Disclaimers The information contained in this document is the exclusive property of Quantum Corporation. [. . . ] Control Mode MODE SENSE Page -- Data Format Table 4-69. Field Name PS SPF Page Code Page Length TST D_Sense GLTSD RLEC Control Mode MODE SENSE Page -- Field Descriptions Description Parameters Savable. Indicates the number of bytes in the Control Mode Page being transferred. Indicates whether the drive returns CHECK CONDITION status with Sense Key set to UNIT ATTENTION (06h) when one of its WRITE and READ error counters reaches a specified threshold. When set to 0, indicates that the drive does not return UNIT ATTENTION when a threshold has been met. When set to 1, indicates that the drive returns UNIT ATTENTION when a threshold is met. Queue Algorithm Modifier Always set to 0. 4-122 July 2004 81-85001-01 REV A04 SDLT 220 and SDLT 320 SCSI Interface Guide Chapter 4: SCSI Commands Table 4-69. Field Name QErr DQue TAS RAC Control Mode MODE SENSE Page -- Field Descriptions (Continued) Description Queue Error. The drive does not return a status for tasks aborted by the actions of other initiators. The drive returns BUSY status rather than CHECK CONDITION status during long busy conditions. The drive clears all UNIT ATTENTION conditions when they are reported. Value 000b 001b 010b Description The medium is loaded for full access. The medium is loaded for Enhanced Medium Auxiliary Memory (EMAM) access only. The medium is not loaded. UA_Intlck_Ctrl SWP Autoload Mode Busy Timeout Period Specifies the maximum time, in 100 msec increments, that the initiator allows the drive to remain busy for unanticipated conditions that are not a routine part of commands from the initiator. Always set to 0. Extended Selftest Completion Time Data Compression Page (0Fh) The Data Compression Page specifies parameters that control data compression. Bit Byte 0 1 2 3 DCE DDE (0) DCC (1) RED (0) 7 PS (0) 6 Rsv'd 5 4 3 2 1 0 Page Code (0Fh) Page Length (0Eh) Reserved Reserved 81-85001-01 REV A04 July 2004 4-123 MODE SENSE (6) / (10) Command (1Ah / 5Ah) SDLT 220 and SDLT 320 SCSI Interface Guide Bit Byte 7 (MSB) 6 5 4 3 2 1 0 4­7 Compression Algorithm (10h) (LSB) (MSB) 8 ­ 11 Decompression Algorithm (LSB) 12 ­ 15 Reserved Figure 4-69. Data Compression MODE SENSE Page -- Data Format Table 4-70. Field Name PS Page Code Page Length DCE Data Compression MODE SENSE Page -- Field Descriptions Description Parameters Savable. Indicates the number of bytes in the Control Mode Page being transferred. The value the drive returns depends on the current WRITE density of the drive. When set to 1, indicates that write compression is enabled. DCC Data Compression Capable. The value the drive returns indicates whether the drive supports data compression. When set to 1, indicates that data compression is enabled. DDE Data Decompression Enable. The value the drive returns indicates whether data decompression is enabled or not. When the drive reads compressed data from tape, it automatically decompresses the data before sending it to the host. RED Report Exception on Decompression. The drive does not report exceptions on decompression (boundaries between compressed and decompressed data). The value for this field is 10h, indicating that the Lempel-Ziv highefficiency data compression algorithm is in use. Compression Algorithm 4-124 July 2004 81-85001-01 REV A04 SDLT 220 and SDLT 320 SCSI Interface Guide Chapter 4: SCSI Commands Table 4-70. Field Name Data Compression MODE SENSE Page -- Field Descriptions (Continued) Description The value for this field is 10h, indicating that the Lempel-Ziv highefficiency data decompression algorithm is in use. [. . . ] The drive detects any potential buffer overruns and rejects the WRITE BUFFER command. 4-254 July 2004 81-85001-01 REV A04 SDLT 220 and SDLT 320 SCSI Interface Guide Chapter 4: SCSI Commands 4. 38. 3 Download Microcode Mode (04h) This mode uses buffer offsets to download the firmware image into the drive's buffer in parts. The firmware image must be downloaded in integral (whole) multiples of 8 KB. A Download Microcode and Save Mode WRITE BUFFER command must be issued for the image to become active. The drive must not contain any tape medium before starting an image download. [. . . ]