500300 Rev. U
SCSI Configuration
5-5
5.1.10
Write Retrys (Default = 13)
The Write Retries parameter lets you set the number of automatic retries the drive
will perform when it detects a hard or correctable error during a write operation.
For each retry, the drive will backspace the tape over the block, erase a four-inch
length of tape, and then rewrite the data.
Use the following procedure to define the number of write retries:
1.
From the top of the SCSI Configuration menu, press ENTER and then use the
and switches until display line two indicates
WRITE RETRYS: YY
, where
YY
is a decimal number from 00 to 99;
2.
Press ENTER to edit the write retry count; display line one will indicate
DN UP
NEXT EXIT,
and display line two will contain the actual data, with a cursor
(underline) under the first digit.;
a.
Use and to change the value of the underlined digit;
b.
Use ENTER to save the value above the cursor and select the other digit;
c.
To accept the data as displayed and leave the editing mode, press EXIT;
d.
To disable write retries, set the count to
00
.
3.
To return to normal operation, press EXIT until the MENU indicator goes out.
Regardless of the value of this parameter, errors that occur while writing blocks
larger than one megabyte will not result in retries.
5.1.11
800 Mask WP
This parameter affects the WP (Write Protect) bit in the Mode Sense Data that the
drive returns upon receiving a Mode Sense command, and is meaningful only when
800 CPI is selected.
•
NO
- When 800 CPI is selected, the WP bit in the Mode Sense Data will be true;
•
YES
- When 800 CPI is selected, the WP bit in the Mode Sense Data will be
false.
The setting of this parameter in no way affects the operation of the drive other than
as previously described. If you select 800 CPI (either at the front panel or by a Mode
Select command), or if you load an 800 CPI tape, the front panel FPT indicator will
be on and the drive's write and erase circuitry will be disabled.
5.1.12
Block Length (Default = 2)
The value of the Block Length parameter defines the default block length when in
the fixed block mode. The displayed value is multiplied by 256 to get the actual block
length; therefore, the default value of 2 produces an actual block length of 512 bytes.
Values from 0 through 99 are valid. Changing this parameter overrides the value
sent by any previous Mode Select command. Also, if a Mode Select command is
