User manual QUANTUM 00220201

[. . . ] DLT VS160 SCSI Interface Guide DLT VS160 SCSI Interface Guide Copyright Copyright © 2003 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, Value DLTtape, 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. [. . . ] Each page has a 2-byte header that identifies the page code and indicates the number of bytes in that page. Supported MODE SENSE Block Pages and Page Codes Description No Requested Page Read/Write Error Recovery Page Disconnect/Reconnect Control Mode Page Data Compression Page Device Configuration Medium Partition TapeAlert Page EEPROM Vendor Unique All Pages (Except EEPROM) Sense/Select Sense Both Both Both Both Both Both Both Both Sense Page Code 00h 01h 02h 0Ah 0Fh 10h 11h 1Ch 3Eh 3Fh 4-88 December 2003 002202-01 DLT VS160 SCSI Interface Guide Chapter 4: SCSI Commands 4. 10. 3 Read / Write Error Recovery Page (01h) The tape drive supports the Read/Write Error Recovery Page, which has the following format: Bit Byte 0 1 2 3 4-7 8 9 - 11 Rsv'd Rsv'd TB 7 PS(0) 6 0 5 4 3 2 1 0 Page Code (01h) Additional Page Length (0Ah) Rsv'd ERR PER DTE DCR Read Retry Count Reserved Write Retry Count Reserved Figure 4-56. Read/Write Error Recovery MODE SENSE Page -- Data Format Table 4-48. Field Name Page Code Page Length TB EER PER DTE DCR Read/Write Error Recovery MODE SENSE Page -- Field Descriptions Description The Page Code identifies the type of MODE SENSE page being transferred. The Page Length indicates the number of bytes in the Error Recovery Page that follow this byte. Transferring blocks (when not fully recovered) function is not supported. This bit enables reporting of CHECK CONDITIONs to report recovered read/write errors. This field reports the maximum number of times the tape drive tries to reread before declaring an unrecoverable error. This field reports the maximum number of times the tape drive tries to overwrite before declaring an unrecoverable error. Read Retry Count Write Retry Count 002202-01 December 2003 4-89 Chapter 4: SCSI Commands DLT VS160 SCSI Interface Guide 4. 10. 4 Disconnect / Reconnect Page (02h) The tape drive supports the Disconnect/Reconnect Page, which has the following format: Bit Byte 0 1 2 3 (MSB) 4-5 Bus Inactivity Limit (LSB) (MSB) 6-7 Disconnect Time Limit (LSB) (MSB) 8-9 Connect Time Limit (LSB) (MSB) 10 - 11 Maximum Burst Size (LSB) 12 13 - 15 Reserved Reserved DTDC 7 PS (0) 6 0 5 4 3 2 1 0 Page Code (02h) Additional Page Length (0Eh) Buffer Full Ratio Buffer Empty Ratio Figure 4-57. Disconnect / Reconnect MODE SENSE Page -- Data Format 4-90 December 2003 002202-01 DLT VS160 SCSI Interface Guide Chapter 4: SCSI Commands Table 4-49. Field Name Page Code Page Length Disconnect / Reconnect MODE SENSE Page -- Field Descriptions Description The Page Code identifies the type of MODE SENSE page being transferred. The value returned for the Page Code is 02h (Disconnect / Reconnect Page). The Page Length indicates the number of bytes in the Disconnect / Reconnect Page that follow this byte. This field specifies the maximum amount of data that can be transferred without disconnecting. Values that are not multiples of 8 are rounded up to the nearest multiple of 8. Page Code 00b 01b Description Data transfer disconnect control is not used. A Target does not attempt to disconnect once the data transfer of a command has started until all data the command is to transfer has been transferred. A Target does not attempt to disconnect after the data transfer of a command has started until the command is complete. Buffer Full Ratio Buffer Empty Ratio Bus Inactivity Limit Disconnect Time Limit Connect Time Limit Maximum Burst Size DTDC 10b 11b 002202-01 December 2003 4-91 Chapter 4: SCSI Commands DLT VS160 SCSI Interface Guide 4. 10. 5 Control Mode Page (0Ah) The Control Mode page allows the user to determine whether the tape drive returns CHECK CONDITION status when one of the write and read error counters has reached a specified threshold. Bit Byte 0 1 2 3 4 5 (MSB) 6-7 Ready AEN Holdoff Period (LSB) (MSB) 8-9 Busy Timeout Period (LSB) (MSB) 10 - 11 Extended Self-Test Completion Time (LSB) EECA Queue Algorithm Modifier Reserved Reserved 7 PS (0) 6 0 5 4 3 2 1 0 Page Code (0Ah) Page Length (0Ah) Reserved Reserved RAENP RLEC QErr UAAENP DQue EAENP Figure 4-58. Control Mode MODE SENSE Page -- Data Format Table 4-50. Field Name Page Code Page Length Control Mode MODE SENSE Page -- Field Descriptions Description The Page Code identifies the type of MODE SENSE page being transferred. The Page Length indicates the number of bytes in the Control Mode Page that follow this byte. The value returned for this byte is 0Ah. 4-92 December 2003 002202-01 DLT VS160 SCSI Interface Guide Chapter 4: SCSI Commands Table 4-50. Field Name RLEC Control Mode MODE SENSE Page -- Field Descriptions (Continued) Description Report Log Exception Condition. The RLEC bit indicates whether the tape drive should return Check CONDITION STATUS with the Sense Key set to UNIT ATTENTION (06h) when one of its write and read error counters reaches a specified threshold, as follows: 0 1 Do not return UNIT ATTENTION when a threshold condition is met. Return UNIT ATTENTION when a threshold condition is met. Queue Algorithm Modifier QErr DQue EECA RAENP UAAENP EAENP Ready AEN Holdoff Period Busy Timeout Period Extended Self-Test Completion Time The value returned for this field is 0. The value returned for this field is 0. 002202-01 December 2003 4-93 Chapter 4: SCSI Commands DLT VS160 SCSI Interface Guide 4. 10. 6 Data Compression Page (0Fh) The Data Compression Page specifies parameters that control the data compression feature. Bit Byte 0 1 2 3 DCE DDE (MSB) 4-7 Compression Algorithm (LSB) (MSB) 8 - 11 Decompression Algorithm (LSB) 12 - 15 Reserved DCC RED 7 PS (0) 6 Rsv'd 5 4 3 Page Code Page Length (0Eh) Reserved Reserved 2 1 0 Figure 4-59. [. . . ] This field provides more detailed information on an abnormal element state. This bit is always 0, indicating that the source storage element address and the invert bit are invalid. These bytes contain the bar code label information from the storage media assigned to this element. This volume tag information will only be sent when the VolTag bit in the CDB is set; otherwise, no volume tag information is sent. Element Address Access Except Full Additional Sense Code Additional Sense Code Qualifier Svalid Invert Source Element Address Primary Volume Tag Information 5-25 December 2003 002202-01 Chapter 5: Medium Changer Device Commands DLT VS160 SCSI Interface Guide Data Transfer Descriptor Bit Byte 7 (MSB) 0-1 Element Address (LSB) 2 3 4 5 6 7 8 9 Svalid (MSB) 10 - 11 Source Element Address (LSB) Primary Volume Tag Information (Field Omitted if PvolTag = 0) 12 13 14 15 16 17 18 - 47 48 - 53 Bar Code Label Information Bar Code Label Information Bar Code Label Information Bar Code Label Information Bar Code Label Information Bar Code Label Information Reserved Reserved Invert NotBus Rsv'd Reserved Access Reserved Additional Sense Code Additional Sense Code Qualifier IDValid LUValid Rsv'd Logical Unit Number Except Rsv'd Full 6 5 4 3 2 1 0 SCSI Bus Address (same as tape drive's) Reserved Reserved Figure 5-19. [. . . ]