User manual QUANTUM LTO-5 REV A

[. . . ] User's Guide User's Guide User's Guide User's Guide User's Guide User's Guide LTO-5 Tape Drive LTO-5 6-66786-01 Rev. 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. [. . . ] LTO-5 tape drives can read Ultrium 800 GB and Ultrium 400 GB media and write Ultrium 800 GB media, but hardware encryption is not supported on these formats. Cleaning the Tape Drive Excessive tape debris or other material can accumulate on the tape heads if the drive is: · Used with non-approved media · Operated in a hot, dusty environment When this happens, the drive can: 34 LTO-5 Tape Drive User's Guide Chapter 3 Operation Cleaning the Tape Drive · Experience excessive errors while reading or writing · The Clean LED is flashing This means that the drive needs to be cleaned. The LTO cleaning cartridge has the same dimensions as the tape cartridge and contains an LTO Cartridge Memory (LTO-CM), but is loaded with cleaning media instead of recording media. Always keep the LTO cleaning cartridge in its protective case when not in use. Procedure To clean the LTO-5 Tape Drive: 1 Load an Ultrium Universal Cleaning cartridge into the tape drive. 2 The drive will carry out its cleaning cycle and eject the cartridge on completion (which can take up to 5 minutes). During the cleaning cycle the orange Clean LED will be on solidly and the green Ready LED will flash. Each Ultrium universal cleaning cartridge can be used up to 50 times with Ultrium tape drives. If the cleaning cartridge is ejected immediately with the Tape LED on, it has expired. Note: If the LTO-5 Tape Drive does not recognize the cartridge as an LTO cleaning cartridge, the drive stops the cleaning process and ejects the cartridge. 3 After the cleaning process completes, depending on the drive configuration, either: a The drive automatically ejects the Ultrium Universal Cleaning cartridge, or b You must press the Eject button to eject the Ultrium Universal Cleaning cartridge. 4 Write the date on the Ultrium Universal Cleaning label for future reference. Always discard used-up Ultrium Universal Cleaning cartridges. LTO-5 Tape Drive User's Guide 35 Chapter 3 Operation Performing an Emergency Cartridge Eject Performing an Emergency Cartridge Eject If the LTO-5 Tape Drive stops communicating with the host computer, use the following procedure eject a cartridge (if necessary). Caution: When you perform an emergency cartridge eject, any data in the drive or host buffers will not be written to the tape and the tape record may not be correctly terminated with an end-of-data mark. If the end-of-data mark is not written to the tape, you will not be able to append any data to that tape unless you overwrite the existing data on the tape. To perform an emergency cartridge eject, hold down the Eject button between 5 to 15 seconds, and then release it. The tape drive firmware ignores all outstanding SCSI commands and ejects the tape. 36 LTO-5 Tape Drive User's Guide Chapter 4 Theory This chapter describes operational theories used in the LTO-5 Tape Drive. The topics covered in this chapter are: · Track Layout · Recording Method on page 38 · Data Buffer on page 39 · Data Integrity on page 39 · Data Compression on page 41 Track Layout With the LTO-5 Tape Drive, there are 1280 data tracks on the LTO tape, numbered 0 through 1279. The data tracks are accessed in a serpentine manner. LTO-5 Tape Drive User's Guide 37 Chapter 4 Theory Recording Method A wrap is a track group recorded in the physical forward or physical reverse direction. The wraps are recorded in a serpentine fashion starting in data band 0. The tape contains 80 track groups, 40 written in the forward direction and 40 written in the reverse direction. Evennumbered wraps are recorded in the forward direction (BOT to EOT), and odd-numbered wraps are recorded in the reverse direction (EOT to BOT). Figure 13 shows the layout of data on an LTO tape. Figure 13 Layout of the Tracks on LTO Ultrium Tapes Tape edge Servo band Even # wrap Odd # wrap Sub-band 0 Beginning of tape (BOT) End of tape (EOT) Sub-bands 1 through 14 (not shown) Data Band Even # wrap Odd # wrap Servo band Tape edge Sub-band 15 Recording Method The LTO-5 Tape Drive records data using write-equalized (0, 13/11) Run Length Limited (RLL) code. RLL (0, 13/11) Data bits are defined as follows: 38 LTO-5 Tape Drive User's Guide Chapter 4 Theory Data Buffer · ONE is represented by a flux transition at the center of a bit-cell. [. . . ] Caution: Powering up with a cartridge in the drive can take several minutes. It is important that you allow sufficient time for the drive to complete rewinding the cartridge. 7 Ensure that drive activity has stopped (waiting 10 minutes after power up is a good rule of thumb). This step attempts to overcome unload issues due to the drive being in an abnormal state or because Prevent Media Removal has been incorrectly left on after being set by a rogue application. [. . . ]