|Title||Porous rollers offer new approach to tape-path design challenges |
|Publication||Data Storage Magazine, June 2001, page 26|
||The MEII porous roller prevents the development of an air film between the roller surface and the tape. The pores are small enough that tape damage didn't occur, even with the thinnest
of tapes, and the tape remained in direct contact with the roller, even at high speeds. Another advantage of the porous roller is that
a tachometer can be attached to it, and since the spool spins at the same rate as the tape movement, it is possible to accurately and
consistently measure tape speed by measuring spool speed.|
|Link||Porous roller article |
|Title||Eliminating the reel motor position sensor in a tape drive|
|Publication||Computer Technology Review, December 2001 (part 1), January 2002 (part 2)|
||An electronic system that utilizes dynamic impedance changes in the windings of an electric motor to measure and monitor the mechanical position.
The method employs a bridge amplifier to measure the voltage at a center node of the driven motor windings against a voltage derived from a reference network.
|Link||Electronic Position Sensor |
|Title||FPGA-Based DPLL Approach Delivers Wide-Lock Range_files|
|Publication||CommsDesign, January 11, 2005|
||Although many designs for digital phase-lock loops (PLLs) exist, most of them are buried in proprietary ASICs. This article presents a simple, second-order digital circuit implemented on a field programmable gate array (FPGA).
|Link||Digital PLL in FPGA |
|Title||RETIRE THOSE TIRED TAPE CARTRIDGES|
|Publication||Data Center Management, July/August 2007 |
||Using damaged or worn out cartridges can be expensive. Lost data can be costly and in some situations impossible to recover. Is it feasible to know which cartridges should be retired? Fortunately, there is a very reliable historical data source.
|Link||DCM article |
|Title||Know when to retire Storage Tape Media|
|Publication||Processor, July 20, 2007 |
|| Components such as a cartridge memory chip can potentially offer an abundant amount of information about the history and condition of cartridges and tape. (processor page 24)
|Link||Processor article |