5-2.2 Vendor Unique Parameter; Table 5-2. Page 00 - Vendor Unique Parameter; Table 5-3. Page 00 -Vendor Unique Parameter Field Description - Fujitsu M2488 Product Manual

TAPE UNIT PARAMETERS
5-2.2 Vendor Unique Parameter
BYTES 7
0 PS * Reserved
1
Reserved WRTY
2
3
4
5-15
* The PS bit must be set to 0 on a MODE SELECT command.

Table 5-3. Page 00 -Vendor Unique Parameter Field Description

BYTE BIT VALUE
2 6 1
0
2 4 1
0
5-2

Table 5-2. Page 00 - Vendor Unique Parameter

BITS
6 5 4
Additional Page Length
Reserved PAEB
Reserved
ADTT
Reserved
When the WRTY bit is set to one, the following feature will be activated:
* if bit 7 of the Write Retry Count field in Mode Page 01h is set to zero, permanent write
errors are to be reported after the retry count in bits 6-0 of the Write Retry Count field have
been exhausted.
* if bit 7 of the Write Retry Count field in Mode Page 01h is set to one, write errors are not
reported, and writing is continued on the next block unless the tape position is lost while
attempting the write operations. CAUTION: This setting may produce unreadable tapes.
When WRTY is set to zero, bits 7-0 of the Write Retry Count field all represent the retry
count setting and permanent write errors will always be reported.
The WRTY bit is reported as changeable on a MODE SENSE command, and the default
value is zero.
When the Position After Error Block (PAEB) bit is set to one, and there is a permanent read
error on tape, the read head is positioned on the opposite side of the error block from the
direction being read (i.e. EOT side for a read forward operation or BOT side for a read
reverse operation). When the read error occurs during a Read (forward) operation, a Read
Position command gives the BID of the block following the block in error.When the read
error occurs during a Read Reverse operation, a Read Position command gives the BID of
the actual block in error.
When PAEB is set to zero, everything remains the same except for the Read Position data,
which would give the BID of the block to position to in order to retry the same read opera-
tion on the bad block. This allows alternate device retry by the host.The host system
requests the cartridge be moved to another device, does a Locate to the block indicated in
the Read Position data, followed by a read operation in the same direction as when the read
data check originally occurred (Read or Read Reverse).
The PAEB bit is reported as changeable on a MODE SENSE command and the default
value is zero.
CG00000-011503 REV. A
M2488 PRODUCT GUIDE
3 2 1
Page Code
Reserved
FRU Reserved
DESCRIPTION
MODE
SENSE
DEFAULT
0
VALUES
80h
0Eh
00h
00h
FEh
00h
April 1997