User manual QUANTUM DX-SERIES SOFTWARE INTERFACE GUIDE 81-81495-01 A01

[. . . ] Quantum DX-Series Software Interface Guide, 81-81495-01 A01, November 2005, Made in USA. Quantum Corporation provides this publication "as is" without warranty of any kind, either express or implied, including but not limited to the implied warranties of merchantability or fitness for a particular purpose. Quantum Corporation may revise this publication from time to time without notice. COPYRIGHT STATEMENT Copyright 2005 by Quantum Corporation. [. . . ] Parameter Code 06h reports the number of full megabytes transferred; Parameter Code 07h reports the number of bytes less than a full megabyte that have been transferred. Multiplying the counter returned for Parameter Code 06h by 1, 048, 576 and then adding the value of the counter returned by Parameter Code 07h results in the actual total bytes transferred from the initiator to the buffer. Parameter Codes 08h and 09h -- Report the count of bytes written to the tape drive. Parameter Code 08h reports the number of full megabytes transferred; Parameter Code 09h reports the number of bytes less than a full megabyte that have been transferred. Multiplying the counter returned for Parameter Code 08h by 1, 048, 576 and then adding the value of the counter returned by Parameter Code 09h results in the actual total bytes written to the tape drive. Device Wellness Page (33h) 3 Device Status Page (3Eh) The Device Wellness Page is not supported. The Device Status Page is not supported. 3 Quantum DX-Series Software Interface Guide 171 Chapter 3 Emulated DLT7000 SCSI Commands Mode Select (6 /10) (15h / 55h) Mode Select (6 /10) (15h / 55h) 3 The MODE SELECT command (available in either 6- or 10-byte format) enables the host to configure the tape drive. Implementing MODE SELECT and MODE SENSE requires "handshaking" between the host and the drive. Before configuring the drive, the host should issue a MODE SENSE command to the drive to obtain a report of the current configuration and determine what parameters are configurable. The host interprets this information and then may issue MODE SELECT to set the drive to the host's preferred configuration. The Mode Parameter List is passed from the initiator to the drive during the command's DATA OUT phase. Information for the drive is carried on a number of pages, each of which serves to set the tape drive's operating parameters. The MODE SELECT pages supported, and the sections of this manual that details each page, are: Page Code 01h 02h 0Ah 0Fh 10h 11h 1Ch 3Eh Description READ/WRITE Error Recovery Page Disconnect / Reconnect Page Control Mode Page Data Compression Page Device Configuration Page Medium Partition Page Tape Alert Page EEPROM Vendor Unique Page Tech Tip: All page information is accepted, but not acted on with the exception of the RLEC bit and block length in the DX-Series system. (Continued on next page) 172 Quantum DX-Series Software Interface Guide Chapter 3 Emulated DLT7000 SCSI Commands Mode Select (6 /10) (15h / 55h) The tape drive always powers up with its default configurations set. This is also true if the drive receives a BUS DEVICE RESET message or a hard reset via the RST line on the SCSI bus. The Command Descriptor Block is illustrated in table 124. Note: For a list of changeable parameters within MODE SELECT, refer to EEPROM Vendor Unique Page 3Eh and Changeable Parameters within MODE SELECT. Table 124 Mode Select (6) Command Descriptor Block Data Format Bit/Byte 0 1 2-3 4 5 7 6 5 4 3 2 1 0 Operation Code (15h) Logical Unit Number PF Reserved Parameter List Length Unused (00) Reserved Flag (0) Link (0) Reserved SP (0) Table 125 Mode Select (10) Command Descriptor Block Data Format Bit/Byte 0 1 2-6 7-8 9 7 6 5 4 3 2 1 0 Operation Code (55h) Logical Unit Number PF Reserved Parameter List Length Unused (00) Reserved Flag (0) Link (0) Reserved SP (0) Quantum DX-Series Software Interface Guide 173 Chapter 3 Emulated DLT7000 SCSI Commands Mode Select (6 /10) (15h / 55h) Table 126 MODE SELECT (6)/(10) Command Descriptor Block - Field Descriptions Field Name PF Description Page Format. The Page Format bit indicates that the data sent by the host after the MODE SELECT header and block descriptors complies with the definition of pages in the SCSI-2 specification. The SCSI-1 format will not be implemented so this bit must be set to 1. It is an ILLEGAL REQUEST to have page parameters while the PF bit is 0. If set, this bit instructs the drive to save all savable pages, and this is not supported on the tape drive. SP Mode Parameter List 3 The figure shows the format of the Mode Parameter List that is passed by the initiator to the tape drive during the command's DATA OUT phase. Table 127 MODE SELECT (6) Mode Parameter List - Data Format Bit/Byte 0-3 4-11 4-11 or 12 - n 7 6 5 4 3 2 1 0 Mode Parameter Header Mode Parameter Block Descriptor (Optional) Page(s) (Optional) Table 128 MODE SELECT (10) Mode Parameter List - Data Format Bit/Byte 0-7 8-15 8-n or 16 - n 7 6 5 4 3 2 1 0 Mode Parameter Header Mode Parameter Block Descriptor (Optional) Page(s) (Optional) 174 Quantum DX-Series Software Interface Guide Chapter 3 Emulated DLT7000 SCSI Commands Mode Select (6 /10) (15h / 55h) Table 129 MODE SELECT Mode Parameter List - Field Descriptions Field Name Mode Parameter Header Description Page Format. The Page Format bit indicates that the data sent by the host after the MODE SELECT header and block descriptors complies with the definition of pages in the SCSI-2 specification. The SCSI-1 format will not be implemented so this bit must be set to 1. It is an ILLEGAL REQUEST to have page parameters while the PF bit is 0. 8 bytes in length, allows the initiator to set the drive's Logical Block Size and number of Descriptor Logical Block Addresses. [. . . ] bar code label The identification label on cartridges. bus device reset message This SCSI-2 message causes the DX-Series system to clear all I/O processes. The Unit Attention condition is set to indicate that the device has been reset. B C calibration The software measurements and configuration required for successful operation of the DX-Series system. command complete message This SCSI-2 message is sent to the host after the DX-Series system has completed the command operation and sent valid status information to the host. [. . . ]