Tandberg Data Streamer SLR140 XE Kit Internal Grey 6721 6934 00 사용자 설명서
제품 코드
6721 6934 00
SLR140 Features
D:\SLR140 Features for Reliability and
Performance.doc
Performance.doc
Page 7 of 13
Printed: 30.03.04
15:17
More than 2 inches (5.6 cm) of missing data on a track and almost 20% of all data can be recreated to
assure reliability during restore
Data and ECC blocks are spread over four tracks to assure highest possible ability to
recreate any lost data during restore.
recreate any lost data during restore.
Adaptive Data Channel
During a write or read operation, the read-while-write or read signal is checked against factory set
limits. These limits are in the area of signal level, phase shift, and timing. If the read signal is outside
any of these limits, the channel characteristics (amplification, write current, signal phase, other) are
readjusted.
limits. These limits are in the area of signal level, phase shift, and timing. If the read signal is outside
any of these limits, the channel characteristics (amplification, write current, signal phase, other) are
readjusted.
This functionality will assure correct written data even for worn media and/or worn head. As an
additional assurance for reading correct data, the read channel characteristics are also corrected if any
error should occur during read - after the tape media was written.
additional assurance for reading correct data, the read channel characteristics are also corrected if any
error should occur during read - after the tape media was written.
The read signal is always verified both during read-while-write and read operations,
and if needed, the channel characteristics are readjusted to assure correct writing,
and trouble-free restore
and if needed, the channel characteristics are readjusted to assure correct writing,
and trouble-free restore
7. Media Management
During write operations, the SLR60-140 tape drives measures the write performance, and write the
performance information on the tape media. If the write performance is below a pre-set limit, the tape
drive reports that cleaning is required. The reporting is done both by the Cleaning LED and over the
SCSI but to the host’s application software.
performance information on the tape media. If the write performance is below a pre-set limit, the tape
drive reports that cleaning is required. The reporting is done both by the Cleaning LED and over the
SCSI but to the host’s application software.
After the cleaning operation is performed, the tape drive continues to measure the write performance
during the next write operation. If the performance is again below the pre-set limit, the tape drive
reports degraded media or degraded tape drive dependent on how the tape drive analyzes the bad
performance.
during the next write operation. If the performance is again below the pre-set limit, the tape drive
reports degraded media or degraded tape drive dependent on how the tape drive analyzes the bad
performance.
Media Management help avoid service need of the tape drive if the media is degraded
Control Bytes
512 Data Bytes
CRC Bytes
Block:
108 Data Blocks
20 ECC Blocks
Frame:
Servo Track
Track
Track
Track
Track
Tracks:
Errors on Tape
432 Data Blocks
80 ECC Blocks
Super Frame: