HP Surestore 28/48-Slot with DLT7000 Digital Linear Tape SCSI-2 Drive and SCSI - Page 283
Additional Considerations, Modifying the Tape Driver for the Library, Load/Unload, Erase, Verify
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Table B-3 Programmer's Tips Modifying the SCSI Driver Additional Considerations The following commands may be needed depending on the intended application. Load/Unload: Used in conjunction with moving tapes in and out of the drives for loading and unloading the tape Erase: Use for applications to pre-erase an entire tape Verify: Used for applications that require an extra level of data verification. A second pass is done to reread the tape that is causing performance degradation Modifying the Tape Driver for the Library The driver that interacts with the library can be an extension to the tape driver or a separate driver, depending on the architecture of the I/O subsystem. For library functionality, the following SCSI commands need to be supported by the driver: Necessary Autochanger SCSI Commands Command OP Code Must Support Initialize Element Status Inquiry Move Medium Read Element Status Request Sense Test Unit Ready 07H 12H A5H B8H 03H 00H Appendix B B- 13
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