Fujitsu M2488, Руководство по эксплуатации продукта

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TAPE UNIT SCSI COMMANDS M2488 PRODUCT GUIDE
4-34 CG00000-011503 REV. A April 1997
Any other value in the Page Code field will result in CHECK CONDITION status with a sense key
of ILLEGAL REQUEST.
A value in the PPC field of other than 0b will be rejected with a CHECK CONDITION status with
a sense key of ILLEGAL REQUEST.
A value in the PC field of other than 01b will be rejected with a CHECK CONDITION status with
a sense key of ILLEGAL REQUEST.
When the Page Code Field contains 3Eh, the controller will attempt to return pages 00h, 02h,03h,
0Ch, and 31h in this order. A minimum allocation length of 1E9h is required to receive all page
data. If fewer than 1E9h bytes are requested, then that number of bytes are returned. If more than
1E9h are requested, then only 1E9h bytes are returned.
4-3.10.2 LOG SENSE Operation
All available log parameters for the specified log page are returned to the initiator during a Data In
phase subject to the specified allocation length. The page requested by the Page Code is trans-
ferred in ascending order of parameter codes. A page control field (PC) of 01b must be specified to
indicate that the target’s current cumulative counter values for the specified log page(s) are
returned.
Log data is cleared under the following ANSI defined conditions:
1. SCSI BUS RESET (if operating in hard reset mode).
2. BUS DEVICE RESET.
3. Power on.
4. Valid Log Select command with the parameter code reset bit (PCR) set to 1.
5-6 The Parameter Pointer field allows the initiator to request parameter data begin-
ning from a specific parameter code to the maximum allocation length or the
maximum parameter code supported by the target, whichever is less. If the value
of the Parameter Pointer field is larger than the largest available parameter code
that can be returned by the target on the specified page, the target shall terminate
the command with CHECK CONDITION status. The sense key shall be set to
ILLEGAL REQUEST and the additional sense code shall be set to INVALID
FIELD IN CDB.
7-8 0-1E9h Allocation Length
Table 4-31. Page Codes
PAGE CODE DESCRIPTION
00h Supported Log Pages
02h Error Counter Page (Write)
03h Error Counter Page (Read)
0Ch Sequential-access device page (support for this feature is dependent on the setting of bit 6 (0x40) in
feature setting FT5 as described in the M2488 User’s Guide).
31h Track Error Statistics
3Eh Return All Supported Pages
Table 4-30. LOG SENSE Field Description (Continued)
BYTE BIT VALUE DESCRIPTION