IBM E16RMLL-I - Tivoli Storage Manager, Руководство по внедрению

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IBM Tivoli Storage Manager Implementation Guide
򐂰 OFFDIRS, for making copies of DISKDIRS to take off-site. OFFDIRS is not
collocated and also has its reclamation threshold set to 100%. Reuse delay is
set to five days.
6.2 Devices
Before defining a new device to the Tivoli Storage Manager server, the device
must first be configured under the operating system. We need the device name
that the operating system understands when configuring the device to Tivoli
Storage Manager.
Tivoli Storage Manager divides physical devices into two broad categories:
random access devices and sequential access devices.
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Random access devices:
magnetic disk devices. Tivoli Storage Manager uses
disk devices for two main purposes:
– To store the database and recovery log.
– To store data from client nodes. The client data is stored in disk storage
pools.
There are two types of disk-based storage pool:
– Those with random access volumes using a DISK device class
– Those with sequential volumes using a FILE device class (See next bullet,
Sequential access devices.)
Magnetic disk devices do not need defining to Tivoli Storage Manager; they
can be referred to directly using a standard drive and path reference, for
example, C:\TSMDATA\STG\DISK_1.DSM for Windows or
/tsm/stg/disk_01.dsm for UNIX/Linux. The device type of DISK is predefined
in Tivoli Storage Manager and cannot be altered.
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Sequential access devices:
tape drives, optical devices, and Write Once Read
Many (WORM) devices. Medium changers such as tape libraries are also
included, as well as sequential volumes on disk (FILE device class).
Drives and libraries must first be defined under the operating system. You
then define the library and drives to Tivoli Storage Manager before defining
storage pools that use the devices.
The FILE device type of DISK is predefined in Tivoli Storage Manager and
cannot be altered.
Device drivers
IBM supplies device drivers for each of its library and tape devices, for each
operating system the device is supported on. If you will be using another