Tandberg Data SDLT220-320 INTEGRATION, Руководство по эксплуатации продукта

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CHAPTER 2: SDLT 220/320 Product Information
the only two modules that are field replaceable. Customer
adjustments to the TCM, DCM, or EIM are not allowed,
and will void the drive’s warranty.
2.4.1 Data Control Module
The Data Control Module (DCM) contains several of the functions and features of
LGMR technology, which is at the heart of the SDLT technology. Of
the five technologies that constitute the LGMR technology, two are found in the
DCM. These are the POS and the MRC heads.
The main functions of the DCM are to provide the path and guides for all the tape
motion inside the drive and to write data to and read data from the tape. In addition
to the POS and MRC heads described in
Section 2.3.2, “Pivoting Optical Servo”
on page 2-4 and Section 2.3.3, “Magneto Resistive Cluster Heads” on page 2-4 ,
the DCM contains a number of components that interact to perform these
functions. These components include the advanced head guide assembly, take-up
reel, drive motor, the optical servo system, and the tape heads.
The SDLT path, from the first tape guide through the take up reel and motor, has
been simplified and improved from the previous DLT systems. The addition of
servo technology in the POS system
has allowed for the reduction of the
number of tape guides from six to four. This provides a simpler tape path in the
SDLT drive, improving performance and reliability.
In addition to its mechanical components, the DCM also contains printed circuit
boards that control the functions of the DCM and the tape heads.