High-density recording using MR heads in helical-scan tape systems

Metal Evaporated Media

“…A lot of work has been performed to show that both the magnetoresistive heads and metal evaporated media could endure large number of recording passes without significant degradation of the recording performances (Kawakami et al, 2005;Ozue et al, 1999;Soda et al, 2001Soda et al, , 2003. The advantages of anisotropic magneto-resistive sensors over inductive sensors for recording on obliquely evaporated media have been reported by Ozue et al (Fukuda et al, 2000;Ozue et al, 1998Ozue et al, , 1999. Using the Co-CoO evaporated medium developed for the tape streamer product (Ozue et al, 1996), they showed that an 11-mm-wide 50 kfci written track could be read with a 12 dB larger signal output using a magnetoresistive sensor instead of the conventional ferrite inductive head.…”

“…Using the Co-CoO evaporated medium developed for the tape streamer product (Ozue et al, 1996), they showed that an 11-mm-wide 50 kfci written track could be read with a 12 dB larger signal output using a magnetoresistive sensor instead of the conventional ferrite inductive head. A CNR improvement of 10 dB at 100 kfci was measured, suggesting the feasibility of higher recording density with magnetoresistive heads in helical-scan tape systems (Ozue et al, 1998). Subsequently, an areal density of 1 Gb/in.…”

Clear stains and their behavior in helical scan tape systems

“…These include head wear, PTR (Pole Tip Recession), and the accumulation of stains [3]. With the use of MR and GMR heads to achieve higher recording density, these problems are intensified [1], [2]. Head wear and PTR can be eased by employing harder materials for the head base and by optimizing the asperities on the tape [4].…”