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CARTRIDGE ESD DISCHARGE IN A STORAGE LIBRARY

IP.com Disclosure Number: IPCOM000013284D
Original Publication Date: 2000-Feb-01
Included in the Prior Art Database: 2003-Jun-18
Document File: 1 page(s) / 34K

Publishing Venue

IBM

Abstract

In a storage library the media plastic casing can pick up electrostatic charges by the sliding motion of the casing against the storage bin. This can occur during either manual loading, or via the picker by moving that piece of media, from a cartridge storage bin into a drive, or vise versa. If the bins are made out of non conductive plastic, their charges in some instances, can build up to 8 to 12 Kilo volts. When the cartridge is loaded into the drive which is grounded to the main frame system, those charges are then discharged into the drive affecting the drive performance which in turn can affect the electronic circuit registers on the printed circuit board card, which can affect the read or write circuit registers on the printed circuit board card, which can affect the read or write circuit drivers, or channels in case of Optical, or Tape storage devices. This in turn could damage the active media in the laser case, or create signal noise internally to the library, which creates read/write errors. The system in some cases have error recovery, or error checks, but by implementing this design, error recovers are minimized, thus improving performance, and data integrity.

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CARTRIDGE ESD DISCHARGE IN A STORAGE LIBRARY

    In a storage library the media plastic casing can pick up electrostatic charges by the sliding motion of the casing against the storage bin. This can occur during either manual loading, or via the picker by moving that piece of media, from a cartridge storage bin into a drive, or vise versa. If the bins are made out of non conductive plastic, their charges in some instances, can build up to 8 to 12 Kilo volts. When the cartridge is loaded into the drive which is grounded to the main frame system, those charges are then discharged into the drive affecting the drive performance which in turn can affect the electronic circuit registers on the printed circuit board card, which can affect the read or write circuit registers on the printed circuit board card, which can affect the read or write circuit drivers, or channels in case of Optical, or Tape storage devices. This in turn could damage the active media in the laser case, or create signal noise internally to the library, which creates read/write errors. The system in some cases have error recovery, or error checks, but by implementing this design, error recovers are minimized, thus improving performance, and data integrity.

    This solution consists of mounting conductive brushes on the picker loader, or manual load station See Figure 1, 2, so that when the cartridge is loaded or unloaded the media casing discharges its electrostatic discharge into ground via the brushes....