SCSI Primary Commands - 2.pdf

18 July 2001 T10/1236-D Revision 20The ASCII OPERATING DEFINITION DESCRIPTION DATA field contains the ASCII operating definition description data forthe device server. The data in this field shall be formatted in lines (or character strings). Each line shall containonly graphic codes (i.e., code values 20h through 7Eh) and shall be terminated with a NULL (00h) character. Thetext is vendor specific.8.4.3 ASCII information pageThe ASCII information page (see table 169) contains information for the field replaceable unit code returned in theREQUEST SENSE data (see 7.20.2).Table 169 — ASCII information pageBitByte7 6 5 4 3 2 1 00 PERIPHERAL QUALIFIER PERIPHERAL DEVICE TYPE1 PAGE CODE (01h - 7Fh)2 Reserved3 PAGE LENGTH (n-3)4 ASCII LENGTH (m-4)5ASCII INFORMATIONmm+1Vendor specific informationnThe PERIPHERAL QUALIFIER field and the PERIPHERAL DEVICE TYPE field are defined in 7.3.2.The PAGE CODE field contains the same value as in the PAGE OR OPERATION CODE field of the INQUIRY CDB (see7.3) and is associated with the FIELD REPLACEABLE UNIT CODE field returned by the REQUEST SENSE command.NOTE 51 The FIELD REPLACEABLE UNIT CODE field in the sense data provides for 255 possible codes, while the pagecode field provides for only 127 possible codes. For that reason it is not possible to return ASCII information pagesfor the upper code values.The PAGE LENGTH field specifies the length of the following page data. If the allocation length of the CDB is toosmall to transfer all of the page, the page length shall not be adjusted to reflect the truncation.The ASCII LENGTH field specifies the length in bytes of the ASCII INFORMATION field that follows. If the allocationlength is less than the length of the data to be returned, the ASCII length shall not be adjusted to reflect thetruncation. A value of zero in this field indicates that no ASCII information is available for the specified page code.The ASCII INFORMATION field contains ASCII information concerning the field replaceable unit identified by the pagecode. The data in this field shall be formatted in one or more character string lines. Each line shall contain onlygraphic codes (i.e., code values 20h through 7Eh) and shall be terminated with a NULL (00h) character.The contents of the vendor specific information field is not defined in this standard.dpANS SCSI Primary Commands - 2 (SPC-2) 209