User manual QUANTUM DLT TAPE DRIVE LIBRARY INTERFACE SPECIFICATION

[. . . ] DLT Tape Drive Library Interface Specification, 6464162-03 A01, June 2006, 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 2006 by Quantum Corporation. [. . . ] Table 7 shows the packet structure. Table 7 Tape Data Packet 1 Description Bit Byte 0-3 7 (MSB) 6 5 4 3 2 1 0 Tape Remaining (LSB) 4-5 (MSB) Read Compression Ratio (LSB) 6-7 (MSB) Write Compression Ratio (LSB) [Bytes 0 to 3] ­ Tape Remaining [Bytes 4 to 5] ­ Read Compression Ratio Represents the number of 4-kilobyte blocks remaining on the tape. 2 Represents the read compression ratio * 100 (shown in this field as a decimal, then multiply it by 100. 2 hexadecimal number). To calculate the ratio, convert the number to read compression ratio = [read compression (base 10) * 100]: 1 DLT Tape Drive Library Interface Specification 19 Chapter 2 Single Byte Library Commands [0x09] ­ LOAD [Bytes 6 to 7] ­ Write Compression Ratio 2 hexadecimal number). To calculate the ratio, convert the number to decimal, then multiply it by 100. write compression ratio = [write compression (base 10) * 100]: 1 Represents the write compression ratio * 100 (shown in this field as a [0x09] ­ LOAD The tape drive loads a data cartridge. 2 [0x0A] ­ CODE UPDATE REQUEST The library enables updating the policy and servo firmware via tape update. Caution: During the code update, while reprogramming the new image into the flash EEPROM is actually in progress, a power failure or power cycle (but not a bus reset) renders the controller module unusable. When doing a code update, take reasonable precautions to prevent a power failure. 2 To perform a Code Update (CUP) from the library, follow these steps: 1 Make certain the tape drive contains no data cartridge. 3 Send the library CODE UPDATE REQUEST command. 5 Check the Tape Motion Status field of the returned General Status Packet to verify the tape drive is in the Ready for Code Update (0x09) state. DLT Tape Drive Library Interface Specification 20 Chapter 2 Single Byte Library Commands [0x0B] ­ REPORT SERIAL NUMBER (deprecated) 6 Insert the data cartridge containing the new firmware into the tape drive. Note: If the drive is currently in the default NO LOAD auto load mode, issue the Library VHF data command. Verify that the cartridge is at the point where the VHF data reflects acknowledgement of media control by the drive. Send a library LOAD command to the drive. 7 Send the library ATTENTION command. 8 Check the Tape Motion Status field of the returned General Status Packet to verify the data cartridge is loading (0x7). It takes about a minute to get into the Updating Code (0xA) state. 10 Check the Tape Motion Status field of the returned General Status Packet to verify the update is in progress (Updating Code [0xA] state). 12 Check the Policy Firmware Version field to verify that the update completed successfully. 13 Unload the data cartridge and remove it from the tape drive. Some update circumstances cause the update to fail: · · · Data cartridge contains an incompatible update image. Data cartridge does not contain an update image. No data cartridge in the tape drive. If the update fails due to any of these circumstances, the tape drive aborts the command, logs the failure, and returns to normal operation. [0x0B] ­ REPORT SERIAL NUMBER (deprecated) 2 The tape drive returns the Serial Number Packet, which contains 10 bytes of information. This command is provided only for backward DLT Tape Drive Library Interface Specification 21 Chapter 2 Single Byte Library Commands [0x0B] ­ REPORT SERIAL NUMBER (deprecated) compatibility and does not contain the full serial number. The tape drive shifts the full serial number right to eliminate any spaces. If the serial number is larger than 10 bytes, the tape drive shifts it left to reduce the size to 10 bytes. [. . . ] Note that bits for OK to Eject, OK to Load, and Load Complete remain 0. DLT Tape Drive Library Interface Specification 72 Chapter 6 Tape Load and Unload Guidelines Tape Load Sample Scenarios Table 33 Tape Drive Now Recovered from Hardware Error General Status 00 15 1E 23 A4 FF 01 40 90 Description A4 40 90 Status Byte 3: Hardware Error is cleared Status Byte 6: Tape Motion - Idle Status Byte 7: Load Complete; Extended Status Changed Approximately 45 seconds after the initial event, the take-up reel was allowed free motion again so that the tape drive recovered from the Hardware Error. Servo posts Idle status while it verifies its position and other status. Extended Status Changed remains set until Extend Status Packet is sent. Table 34 Tape Drive Calibrating on Tape General Status 00 15 1E 23 A4 FF 10 4B 90 Description 10 4B Status Byte 5: Tape Format (110/220 GB on Super DLTtape I) Status Byte 6: Tape Motion - Calibrating Load Complete is defined as "the data cartridge has completed loading. " However, the tape drive is still in the process of coming ready and performs calibration after loading the data cartridge. DLT Tape Drive Library Interface Specification 73 Chapter 6 Tape Load and Unload Guidelines Tape Load Sample Scenarios Table 35 Tape Drive Reading Data (Directory Read) General Status 00 15 1E 23 A4 FF 10 43 90 Description 43 Status Byte 6: Tape Motion - Reading The tape drive reads the directory after calibration completes. Table 36 Tape Drive Has Recovered from a Load Error and Is Ready General Status 00 15 1E 23 A4 FF 10 40 90 The tape drive is ready and idle. Description 40 Status Byte 6: Tape Motion - Idle VHF Data During Load 6 Figure 1 illustrates the VHF data returned and the states of the load sequence. DLT Tape Drive Library Interface Specification 74 Chapter 6 Tape Load and Unload Guidelines Tape Load Sample Scenarios Figure 1 General Soft Load Sequence in Automation LOAD No Auto Load Auto Load VHF: 11 20 00 00 No Media No Media VHF: 11 20 00 00 Place media cartridge in drive VHF: 11 30 00 00 Media In Drive Release/retract picker (if required by picker design) and then advance (load) media cartridge)1 Media Able to Load Stop picker motion2 and maintain position Media In Drive VHF: 11 30 00 00 VHF: 11 10 00 00 Load command from automation device to drive Media seating (inXtn)3 Retract picker 1 second (minimum) after initiating media cartridge load Media Threading (inXtn) Media Threading (inXtn) Media seating (inXtn) VHF: 11 90 00 00 VHF: 11 90 02 00 VHF: 11 90 02 00 VHF: 11 94 02 00 VHF: 11 94 02 00 VHF: 11 17 00 00 VHF: 31 17 00 00 Media loaded Media loaded VHF: 11 17 00 00 VHF: 31 17 00 00 1. Maximum push force = 20N; Minimum push force = 8N 2. [. . . ]