2. Experimental procedure
The range of temperature, humidity and other parameters
associated with the heads and tapes used in these
experiments are given in Table 1 with the corresponding
values of normalised water content (NWC) [12]. The range
of environmental conditions was chosen to cover manufactures
specified operating ranges.
Figs. 1 and 2 show schematic diagrams of the heads used.
In both heads, the pole, shared pole/shield and shield are
cobalt-zirconium-tantalum (CoZrTa) amorphous films, the
insulator is sputtered Al2O3 and ceramic tape bearing
surface is AlTiC (Al2O3–TiC). The magneto resistive (MR)
element (reader sensor) is permalloy (Ni–Fe). The width of
thin film region is around 50 mm for both systems. The LTO
system adopts multi-channel and slot technology [13].
The Travan5 experiment set-up used has been reported
by Wild et al. [12]. The LTO Ultrium single-reel cartridge
design uses a take-up reel that is located inside the drive.
The tape is engaged by means of a coupler that ‘grabs’ a
leader pin at the start of the tape and guides it around the
tape head to the take-up reel in the drive. After the leader pin
is secured in the take-up reel, the reel rotates and pulls the
tape through the tape path. The tapes used throughout the
experiments were of the same formulation, but of different
widths loaded into appropriate cartridges. The tape speeds
for both LTO and Travan5 were kept at 2.3 msK1.
Tapes were cycled for up to 5000 passes in modified
LTO and Travan5 drives operated in a Votsch environment
chamber. Communication with the LTO drives was
established using a macro language (Dexter). This allowed
various tasks, including cycling and error rate tests, to be
performed. The head position could also be set at any point
across the width of the tape. Each pass represented the
passage of 200 m of tape. An unused head and cartridge was
used for each experiment. Three drives were run at each
2. Experimental procedure
The range of temperature, humidity and other parameters
associated with the heads and tapes used in these
experiments are given in Table 1 with the corresponding
values of normalised water content (NWC) [12]. The range
of environmental conditions was chosen to cover manufactures
specified operating ranges.
Figs. 1 and 2 show schematic diagrams of the heads used.
In both heads, the pole, shared pole/shield and shield are
cobalt-zirconium-tantalum (CoZrTa) amorphous films, the
insulator is sputtered Al2O3 and ceramic tape bearing
surface is AlTiC (Al2O3–TiC). The magneto resistive (MR)
element (reader sensor) is permalloy (Ni–Fe). The width of
thin film region is around 50 mm for both systems. The LTO
system adopts multi-channel and slot technology [13].
The Travan5 experiment set-up used has been reported
by Wild et al. [12]. The LTO Ultrium single-reel cartridge
design uses a take-up reel that is located inside the drive.
The tape is engaged by means of a coupler that ‘grabs’ a
leader pin at the start of the tape and guides it around the
tape head to the take-up reel in the drive. After the leader pin
is secured in the take-up reel, the reel rotates and pulls the
tape through the tape path. The tapes used throughout the
experiments were of the same formulation, but of different
widths loaded into appropriate cartridges. The tape speeds
for both LTO and Travan5 were kept at 2.3 msK1.
Tapes were cycled for up to 5000 passes in modified
LTO and Travan5 drives operated in a Votsch environment
chamber. Communication with the LTO drives was
established using a macro language (Dexter). This allowed
various tasks, including cycling and error rate tests, to be
performed. The head position could also be set at any point
across the width of the tape. Each pass represented the
passage of 200 m of tape. An unused head and cartridge was
used for each experiment. Three drives were run at each
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