The positioning accuracy achievable by track-follow servo for flexible tape media is investigated using advanced concepts for several elements of the system. First, the servo pattern geometry in the timing-based servo system is designed in conjunction with a digital synchronous servo channel to minimize the measurement error in the position-error signal. Second, a flangeless tape path is introd...

Kazuko Hanai ,Yutaka Kakuishi Research & Development Center,Recording Media Products Div., Fuji Photo Film Co.Ltd. 2-12-1 Ohgi-cho Odawara Kanagawa, 250-0001, Japan [email protected] [email protected] tel: +81-465-32-2023 fax: +81-465-32-2170 Abstract Archival life of MP (metal particles) tape is one of the biggest concerns for mass data storage users. The long-term stability...

the Sixth IEEE Symposium on Mass Storage Systems held at Vail, Colorado, in June 1984. To owners of large collections of data at the symposium, the future looked bright indeed. There were descriptions of new highperformance optical digital data disk products,'-3 descriptions of new very high density magnetic tape4 and magnetic disk formats, and a discussion of the design decisions leading up to...

This paper describes the areal density (bits per unit area) roadmap goals for tape based magnetic recording (TAPE) and uses these goals as counterpoints for the areal density roadmap strategies for Hard Disk Drive (HDD) and NAND flash. Technology comparisons described in this paper will show that presently volumetric densities (bits per unit volume) for TAPE, HDD, and NAND are similar and that ...

The magnetic flux density component perpendicular to the broad tape face was mapped by miniature Hall probes in the vicinity of a striated YBCO-coated tape at frequencies of external magnetic field from 21 to 400 Hz, applied perpendicularly to the tape surface. For reasons of modelling the coupling current behaviour in tapes with a conductive substrate, we amplified the coupling current–amplitu...

This research attempted to fabricate a gas-diverting valve using LTCC technology for the emerging field of meso-scale devices. A photolithographic process for patterning Low Temperature Co-Fired Ceramic (LTCC) tapes utilizing DuPont Green Tape tape coupled with DuPont Riston 9015, a dry photoresist, is described in detail. Based on the device design, calculations determining the theoretical r...

The IBM Virtual Tape Server provides a revolutionary tape storage solution that emulates tape drives using a disk cache, providing up to 256 virtual tape-drive images and stacking the virtual tape volumes onto a maximum of 12 physical tape drives. The high ratio of virtual to physical drives, combined with the stacking of virtual volumes, provides tape storage that is both costand space-efficie...

Red-tape barriers (RTBs) are an important source of trade costs, but have received little attention in the trade literature. In this paper we take a first step toward a theory of RTBs, and show that their implications can be very different from those of more traditional trade barriers. The model highlights that RTBs have important impacts on the extensive margin of trade, and yields rich compar...