Product manual

Barracuda 9 Product Manual, Rev. C 47
9.3.1 Inquiry data
Table 8 following lists the Standard Inquiry command data that the drive returns to the initiator per the format
given in the
SCSI Interface Product Manual, part number 77738479, section 5.1.1.3.
Table 8: Barracuda 9 family drive Standard Inquiry data
Notes.
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1
The drive can be changed between these two configurations:
01 = SCSI-1 implemented.
02 = SCSI-2/SCSI-3 implemented (default is 02).
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2
The drive can be changed between these two configurations:
01 = Response data is in SCSI-1 format and has compatibility with Common Command Set data.
02 = Response data is in SCSI-2/SCSI-3 format (default).
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3
For “N” models this value is 1E.
For “W,” “WD,” “WC,” and “DC” models this value is 3E.
R# Four ASCII digits representing the last four digits of the product Firmware Release number. This informa-
tion is also given in the Vital Product Data page C0h, together with servo RAM and ROM release num-
bers.
S# Eight ASCII digits representing the eight digits of the product serial number.
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4
Bytes 18 through 23 reflect model of drive. Shown here are hex values for Model ST19171N.
For models “W,” “WD,” “WC,” and “DC,” byte 23 is 57 (W), since these are wide data bus drives and that is
the only fact the host needs to discover from byte 23.
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5
Copyright Year - changes with actual year.
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6
For “N” models, this value is 00. For models “W,” “WD,” “WC,” and “DC,” this value is 01.
9.3.1.1 Inquiry Vital Product Data pages
Instead of the Standard Inquiry data shown in Table 8, the initiator can request several Vital Product Data
pages by setting the Inquiry command EVPD bit to one. The
SCSI Interface Product Manual, part number
77738479, section 5.1.1.3.1 lists the Vital Product Data pages and describes their formats. A separate Inquiry
command must be sent to the drive for each Vital Product Data page the initiator wants the drive to send back.
9.3.2 Mode Sense data
The Mode Sense command provides a means for the drive to report its operating parameters to the initiator.
The drive maintains four sets of mode parameters: default values, saved values, current values and change-
able values.
Default values are hard-coded in the drive firmware that is stored in flash EPROM nonvolatile memory on the
drive PCB. Default values can be changed only by downloading a complete set of new firmware into the flash
EPROM. An initiator can request and receive from the drive a list of default values and use those in a Mode
Select command to set up new current and saved values, where the values are changeable.
Bytes Data (HEX)
0-15 00 00 [02]
1
[02]
2
8F 00 [00]
6
[1E]
3
53 45 41 47 41 54 45 20 VENDOR ID
16-31 53 54 [31] [39] [31] [37] [31] [4E]
4
20 20 20 20 20 20 20 20 PRODUCT ID
32-47 R# R# R# R# S# S# S# S# S# S# S# S# 00 00 00 00
48-63 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
64-79 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
80-95 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
96-111 00 43 6F 70 79 72 69 67 68 74 20 28 63 29 20 [31] COPYRIGHT
112-127 [39] [39] [37]
5
20 53 65 61 67 61 74 65 20 41 6C 6C 20 NOTICE
128-143 72 69 67 68 74 73 20 72 65 73 65 72 76 65 64 20