Exabyte EXB-8205 Betriebsanleitung PDF herunterladen (Seite 78)

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101

Note: The short filemark in 8200 format is equivalent to the alternate

short filemark written by the EXB-8200SX. Refer to the

EXB-8200SX 8mm Cartridge Tape Subsystem Product

Specification and User’s Manual for more information.

Summary of Filemark Sizes

As described in Table 3-3, the size of the filemarks that can be written

depend on the format of the tape and on the setting of the Short bit in

the WRITE FILEMARKS (10h) command (see Chapter 27).

Tape

written by

CTS in...

Type and size of filemarks

Long

(Short bit = 0)

Short

(Short bit = 1)

KBytes Tracks KBytes Tracks

8500c format*

(EXB-8505)

48 6 1 <1

8500 format

(EXB-8505)

48 6 1 <1

8200c format* 2,160 270 1 <1

8200 format 2,160 270 184 23

* Filemarks are not compressed.

Setmarks (EXB-8505 Writing in 8500c Format Only)

When you use the EXB-8505 to write in 8500c format, you can issue a

WRITE FILEMARKS command to write one or more setmarks to tape.

Setmarks function similarly to the long filemark in 8500c format. You

can issue a SPACE (11h) command to space to setmarks in the same

way you space to filemarks; however, you can also use a MODE

SELECT (15h) command to suppress setmark detection during read,

verify, space block, and space filemark operations. Like the 8500c

long filemark, each setmark occupies six tracks of information:

Two tracks of erase gap at the beginning

Two tracks of setmark physical blocks

Two tracks of erase gap at the end

For additional information about using setmarks, refer to Chapter 27.

Table 3-3 Types and sizes of filemarks

3-16

EXB-8205 and EXB-8505

(Standard and XL)

510503

3 Implementing CTS Operations

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