Sun Microsystems StorageTek T9840, Руководство пользователя

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Mixed Media Management
95739 • Revision YA Chapter 1 Overview 31
Mixed Media Management
Since T9840A, T9840B, T9840C, and T9840D drives use the same 9840 standard data
cartridge, you should take extra media management measures when:
■
T9840C drives co-exist in the same library system with T9840A/B drives
■
T9840D drives co-exist in the same library system with T9840A/B/C drives
The extra measures essentially involve creation and management of separate media
pools/sub-pools for:
■
T9840A/B formatted/written data cartridges
■
T9840C formatted/written data cartridges
■
T9840D formatted/written data cartridges
Guidelines for creation and maintenance of media pools/sub-pools are located in
ACSLS, HSC, and independent software vender (ISV) documentation sets.
T9840A/B tape drives cannot read from a data cartridge written by either T9840C or
T9840D tape drive because of the higher-density formats, and must have an appropriate
drive firmware level to even identify the higher-density data cartridges:
■
T9840A:
■
R1.33.103, or higher, to identify a T9840C written cartridge
■
R1.41.105, or higher, to identify a T9840D written cartridge
■
T9840B:
■
R1.33.303, or higher, to identify a T9840C written cartridge
■
R1.41.305, or higher, to identify a T9840D written cartridge
■
T9840C - R1.41.505, or higher, to identify a T9840D written cartridge
Without the appropriate drive firmware level, a T9840A/B drive would consider a
higher-density formatted cartridge blank and available for scratch. T9840A/B drive
attempts to read the data from an identified higher-density data cartridge will fail.
TABLE 1-2
Cartridge Read/Write Compatibility
Compatibility
Drive Model
T9840A T9840B T9840C T9840D
Read a cartridge formatted by: T9840A and
T9840B T9840A and
T9840B T9840A,
T9840B, and
T9840C T9840A,
T9840B,
T9840C, and
T9840D
Write or append data to a cartridge
formatted by: T9840A and
T9840B T9840A and
T9840B T9840C T9840D