
Writing and Reading in 8500c Format (EXB-8505)
This section describes how to use the EXB-8505 to write, append to,
and read tapes in 8500c format.
Writing 8500c Format Tapes
The procedure you follow for writing in 8500c format depends on
whether your SCSI driver supports MODE SELECT pages. (Refer to
page 10-68 if you cannot issue MODE SELECT commands.)
If Your SCSI Driver Does Not Support MODE SELECT Pages If your
SCSI driver does not support MODE SELECT pages, follow these
steps to write data in 8500c format:
1. Load a blank data cartridge in the EXB-8505 (or load a
previously written data cartridge that you want to overwrite).
2. Issue a MODE SELECT (15h) command at LBOT. Set the
Density Code in the Block Descriptor to 8Ch.
3. Issue a WRITE (0Ah) or WRITE FILEMARKS (10h) command
to write the data.
If Your SCSI Driver Supports MODE SELECT Pages If your SCSI
driver supports MODE SELECT pages, follow these steps to write
data in 8500c format:
1. Load a blank data cartridge in the EXB-8505 (or load a
previously written data cartridge that you want to overwrite).
2. Issue a MODE SELECT (15h) command at LBOT. Set the
Density Code in the Block Descriptor to 8Ch.
3. Issue a WRITE (0Ah) or WRITE FILEMARKS (10h) command
to write the data.
4. If desired, issue additional MODE SELECT commands to
turn data compression on and off.
•
To turn compression off, set the DCE bit in the Data
Compression Page to 0.
•
To turn compression back on, set the DCE bit in the Data
Compression Page to 1.
10-62
EXB-8205 and EXB-8505
(Standard and XL)
510503
10 MODE SELECT (15h) and MODE SENSE (1Ah)
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