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StorageWorks 8505 8mm Cartridge Tape Drive
1–4 Order Number: EK–STWCT–UG. E01
1.3 Support for Four Data Formats
The StorageWorks 8505 8mm Cartridge Tape Drive can read and write data in four
formats:
• EXB-8500c (compressed) format
• EXB-8500 format
• EXB-8200c (compressed) format
• EXB-8200 format
When writing in its default EXB-8500c (compressed) format, the 8mm tape drive
implements a powerful algorithm that enables it to compress user data at ratios of 2:1 or
greater. Assuming an average compression efficiency of 2:1, the tape can store up to
10 GBytes of data on a single 8mm data cartridge.
NOTE
The actual compression ratio achieved depends on the type of
data to be compressed. This guide assumes an average
compression efficiency of 2:1.
When writing in the non-compressed EXB-8500 format, the tape drive can store up to
5.0 GBytes of data on a single 8mm data cartridge.
When writing in the EXB-8200c (compressed) format, the tape drive can store up to
5.0 GBytes of data on a single 8mm data cartridge, assuming an average compression
efficiency of 2:1
When writing in the non-compressed EXB-8200 format, the tape drive can store up to
2.5 GBytes of data on a single 8mm data cartridge. Refer to Appendix B and C of this
guide for detailed data format information for your specific operating environment.
Table 1–1 lists the read and write compatibilty of several data formats with several 8mm
tape drives. Note that devices with names beginning "EXB" are produced by EXABYTE
Corporation; devices with names beginning "TKZ" are produced by Digital Equipment
Corporation. In the table, SWXTE represents all three packaging options of the
StorageWorks 8mm Cartridge Tape Drive.
Table 1–1 Read/Write Compatibility of 8mm Tape Drives and Data Formats
Tape format Can be written and read by an . . .
TKZ08 and
EXB-8200
EXB-8200SX EXB-8205
TKZ09 and
EXB-8500
EXB-8500c SWXTE and
EXB-8505
EXB-8500c –
–––
Yes Yes
EXB-8500
–––
Yes
Yes Yes
EXB-8200c
––
Yes
–
Yes Yes
EXB-8200 Yes Yes Yes
Yes
Yes Yes