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It is better to inspectthe tape media before it is loaded into standalone tape drive or autoloader. Inspectionof the tape media may not be possible every time, therefore the media must beinspected when the background of tape media is not known, tape cartridge isdropped, failure of tape drive as soon as the tape is inserted or if the drivefails periodically/repeatedly. Checking the condition of the data tapecartridge and verification of the tape leaders that they are not damaged ortorn can help to avoid repeated tape drive failures. Checking the tape mediatakes only few moments and hence makes sure uninterrupted data backupprocess.
Tape technology of DLT(digital linear tape) has mechanism of ?latch leader? in which the drive isengaged onto the leader of tape cartridge and then the media is pulled into thetape drive. If the tape cartridge drops and the cartridge leader damages, thensometimes there are chances that the tape drive may cause fatal or load errorsso the tape drive might need replacement. Cartridge leader is the major andcore element in the DLT tape drive's functionality. Just open the door of theDLT tape cartridge for checking the cartridge leader that it is damaged or not.Door of the DLT tape cartridge is spring loaded and it can be opened byreleasing it gently. There are ?reel locks? in inner side of DLT cartridge.When DLT tape is not inserted into drive, spinning or moving of ?media spool'is prevented by these ?reel locks?. If the tape is dropped accidentally, thenit might damage the reel locks of DLT cartridge.
The tape media should becast off if is has misplaced cartridge leader because of failure of reel locks.Another easy method for reel lock's verification that they are in goodcondition is to gently shake the tape media, and incase there is a rattlingsound from the cartridge replace the cartridge. Other checking area of the DLTtape cartridge is the ?cartridge hub?. The hub should be properly spring loadedand correctly seated inside the tape cartridge. The media hub should returnproperly to its seated position after it is pressed gently. If it does notreside properly to its seated position or if the leader and the loop are notvisible any more, then the tape should be discarded. DLT tapes whose leaderloops are snapped must also be replaced. Most of the times seeing the tear orsnap in tape cartridge's leader is difficult. So another easy method to see thetear is checking the leader's tension with the help of ballpoint pen. Do notuse pencil for checking.
Therefore the conclusion aboutthe discussion of checking the tape cartridge is that they should be checked tosee if there are any signs of cracks, damage or tear to the casing of the tapecartridge. Make sure that there are no screws missing and that the DLT tapesare intact. The door locks must be spring loaded and should be in properworking condition. The switch of ?write protect? should be movable but makesure that when it is set to a specific position, it remains in that position. Cartridgeleader of the DLT data tape needs to be checked with ballpoint pen and itshould remain intact. The ?hub? needs to be spring loaded and it must becentered in the DLT tape cartridge. Make sure that the Digital linear tapecartridge has no labels on it besides the label slot. Gently vibrate the DLTtape to check whether there is any kind of rattles. If there are any rattles,then the tape cartridge must be disposed off.
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