Chapter 2: Introduction
Channel Calibration
18 Quantum LTO-9 HH SAS User’s Guide
restarts motion. A backhitch is usually the result of a mismatch between
the data rates of the server and the drive.
Channel Calibration
System performance is further optimized by a feature called channel
calibration, in which the drive automatically customizes each read/write
data channel to compensate for variations in such things as the
recording channel's transfer function, the media, and characteristics of
the drive head.
Data cartridge capacity scaling
The SET CAPACITY SCSI command enables a customer to capacity scale a
data cartridge to enable faster random access. As an example, a
customer could capacity scale a data cartridge to 20% of its normal
length which improves the average access time by almost a factor of 5;
however, it also reduces the native capacity of the tape to 1.2 TB.
Encryption
The Quantum LTO-9 Tape Drive supports host Application Managed
Encryption (AME), using T10 encryption methods. Data encryption is
supported with LTO Ultrium 4 and later Data Cartridges only.
The encryption-enabled drive contains the necessary hardware and
firmware to encrypt and decrypt host tape application data. Encryption
policy and encryption keys are provided by the host application. A drive
digital certificate is installed at manufacturing time. Each drive receives
a unique serial number and certificate. The T10 Application can validate
each drive instance by checking the drive's digital certificate.
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