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. Making copies or adaptations without prior written authorization of Quantum Corporation is prohibited by law and constitutes a punishable violation of the law. [. . . ] Set the write protection switch to enable writing, or use a different tape cartridge. Wait for the operation to complete before attempting to eject the tape cartridge. For normal tape drive data-related operations, replace the cleaning cartridge with a data tape cartridge. Make sure that all tape operations have completed, eject the data tape cartridge and follow the appropriate steps to use a cleaning cartridge. Wait for all tape drive operations to complete, then use a valid cleaning cartridge for cleaning. 9 Write Protect Critical 10 No Removal Informational 11 Cleaning Media 20 Clean Now Informational Critical 22 Expired Cleaning Media Critical Quantum DX-Series Software Interface Guide 165 Chapter 3 Emulated DLT7000 SCSI Commands Log Sense (4Dh) Flag 31 Hardware B 32 Interface 34 Download Fail 40 Loader Hardware A Severity Level* Critical Warning Warning Critical Meaning The tape drive may have a hardware fault. The mechanism that loads media to the tape drive is experiencing problems communicating with the tape drive. * Severity levels are Informational, Warning, and Critical. Informational flags provide a statustype message, Warning flags indicate that there is the possibility of loss of data, and Critical flags indicate the possibility of loss of data and that user intervention is urgently required. Read / Write Compression Page (32h) This page begins with a 4-byte header followed by the log parameter blocks of 6 or 8 bytes, depending on the Parameter Code selected. 3 Tech Tip: Read/write compression page updates only the bytes read/write from and to the host in the DXSeries system. Table 118 Read / Write Compression Ratio LOG SENSE Header Format Bit/Byte 0 1 7 6 5 4 3 2 1 0 Reserved Page Code (32h) Reserved (MSB) 2-3 Additional Length (LSB) 166 Quantum DX-Series Software Interface Guide Chapter 3 Emulated DLT7000 SCSI Commands Log Sense (4Dh) Table 119 Read / Write Compression Ratio LOG SENSE Header Field Descriptions Field Name Page Code Additional Length Description The Page Code echoes the page code that was specified in the LOG SENSE command descriptor block. The Additional Length field specifies the number of bytes available and depends on the parameters requested. Table 120 Log Parameters Format for Read / Write Compression Ratio LOG SENSE Page (Parameter Codes 00h and 01h) Bit/Byte 7 6 5 4 3 2 1 0 (MSB) 0-1 Parameter Code (LSB) 2 3 DU DS(1) TSD(1) ETC 02h TMC Rsv'd LP (MSB) 4-n Compression Ratio x 100 (LSB) Quantum DX-Series Software Interface Guide 167 Chapter 3 Emulated DLT7000 SCSI Commands Log Sense (4Dh) Table 121 Log Parameters for Read / Write Compression Ratio LOG SENSE Page Field Descriptions (Parameter Codes 00h and 01h) Field Name Page Code Description Parameter Codes supported for the READ / WRITE COMPRESSION RATIO page are as follows (for codes 00h and 01h only; codes 02h through 09h are detailed separately): Parameter Code - Description 00h 01h - READ Compression Ratio x 100 - WRITE Compression Ration x 100 DU DS TSD ETC TMC LP Disable Update. Always set to 0 (parameter codes treated as data counter). 168 Quantum DX-Series Software Interface Guide Chapter 3 Emulated DLT7000 SCSI Commands Log Sense (4Dh) Table 122 Log Parameters Format for Read / Write Compression Ratio LOG SENSE Page (Parameter Codes 02h through 09h) Bit/Byte 7 6 5 4 3 2 1 0 (MSB) 0-1 Parameter Code (LSB) 2 3 DU(0) DS(1) TSD(1) ETC(0) 04h (MSB) TMC(0) Rsv'd LP(0) 4 Counter Value (LSB) Quantum DX-Series Software Interface Guide 169 Chapter 3 Emulated DLT7000 SCSI Commands Log Sense (4Dh) Table 123 Log Parameters for Read / Write Compression Ratio LOG SENSE Page Field Descriptions (Parameter Codes 02h through 09h) Field Name Parameter Code Description Parameter Codes supported for the READ / WRITE COMPRESSION RATIO page (codes 02h through 09h) are as follows: Parameter ­ Code Descriptions 02h - Mbytes Transferred to Host 03h - Bytes Transferred to Host 04h - Mbytes Read from Tape 05h - Bytes Read from Tape 06h - Mbytes Transferred from Host 07h - Bytes Transferred from Host 08h - Mbytes Written to Tape 09h - Bytes Written to Tape DU DS TSD ETC TMC Disable Update. Always 0. 170 Quantum DX-Series Software Interface Guide Chapter 3 Emulated DLT7000 SCSI Commands Log Sense (4Dh) Field Name LP Counter Value Description List Parameter. Parameter Codes 06h and 07h -- Report the count of bytes transferred from the initiator to the buffer. 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. [. . . ] See Test Unit Ready (00h) on page 268 for more information. 5 Verify Implemented per specification See Verify (13h) on page 269 for more information. 5 Write Implemented per specification. See Write (0Ah) on page 271 for more information. 5 Write Buffer 5 The DX-Series system returns a check condition, unsupported command, whereas the DLT 7000 supports this command. See Write Buffer (3Bh) on page 274 for more information. Write Filemarks Implemented per specification. See Write Filemarks (10h) on page 277 for more information. 5 312 Quantum DX-Series Software Interface Guide Glossary A abort message This SCSI-2 message allows the host to abort a process and stop the DX-Series system's operation at its next "safe" position. [. . . ]