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Cheetah T10 SAS Product Manual, Rev. A 51
9.3.1 Inquiry data
Table 9 lists the Inquiry command data that the drive should return to the initiator per the format given in the
SAS Interface Manual.
Table 9: Cheetah T10 SAS inquiry data
* Copyright year (changes with actual year).
** SCSI Revision support. See the appropriate SPC release documention for definitions.
PP 10 = Inquiry data for an Inquiry command received on Port A.
30 = Inquiry data for an Inquiry command received on Port B.
R# Four ASCII digits representing the last four digits of the product firmware release number.
S# Eight ASCII digits representing the eight digits of the product serial number.
[ ] Bytes 16 through 26 reflect model of drive. The table above shows the hex values for Model ST3300555SS.
Refer to the values below for the values of bytes 16 through 26 of your particular model:
ST3300555SS 53 54 33 33 30 30 35 35 35 53 53
ST3146755SS 53 54 33 31 34 36 37 35 35 53 53
ST373355SS 53 54 33 37 33 33 35 35 53 53 20
9.3.2 Mode Sense data
The Mode Sense command provides a way for the drive to report its operating parameters to the initiator. The
drive maintains four sets of mode parameters:
1. Default values
Default values are hard-coded in the drive firmware stored in flash E-PROM (nonvolatile memory) on the
drive’s PCB. These default values can be changed only by downloading a complete set of new firmware
into the flash E-PROM. 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 change
-
able.
2. Saved values
Saved values are stored on the drive’s media using a Mode Select command. Only parameter values that
are allowed to be changed can be changed by this method. Parameters in the saved values list that are not
changeable by the Mode Select command get their values from default values storage.
When power is applied to the drive, it takes saved values from the media and stores them as current val-
ues in volatile memory. It is not possible to change the current values (or the saved values) with a Mode
Bytes Data (hex)
0-15 00 00 xx** 12 8B 00 10 0A 53 45 41 47 41 54 45 20 Vendor ID
16-31 [53 54 33 33 30 30 35 35 35 53 53]
1
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 32* *Copyright
112-127 30* 30* 36* 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