
Zeus
IOPS
3.5-Inch Fibre Channel Solid State Drive 63
LOG SENSE
The parameters of the table are as follows:
Bit
Byte76543210
0 Operation Code = 4Dh
1 Reserved PPC SP
2 PC Page Code
3 Sub Page Code
4 Reserved
5 (MSB)
Parameter Pointer
6 (LSB)
7 (MSB)
Allocation Length
8 (LSB)
9 Control
Name Description
PPC Parameter Pointer Control If set to 1, the device shall return parameters that have
changed since the last LOG SENSE/LOG SELECT
command. The device shall only return parameter codes
which have a value greater than or equal to the number
specified in the parameter pointer field. If set to 0, the
device will return all parameter codes greater than or
equal to the parameter pointer field. The PPC bit and the
Parameter Pointer fields are not currently supported
by the SSD.
SP Save Pages If set to 1, the device shall save the parameter values that
were requested to non-volatile memory, where the DS bit
of the parameter block is set to 1. The saving of
parameters is optional and not supported by the SSD.
PC Page Control This parameter controls what type of page values the
command is processing. Only current cumulative
values are supported by the SSD.
Page Code The Page Code and Sub Page Code fields contain the
page and subpage to which the other command bytes
apply. A page code and subpage code of 0 specify that
the command bytes apply to all pages and subpages. A
value of FFh in the Sub Pages field denotes the command
bytes apply to all subpages of the specified page;
otherwise, specific pages and subpages must be
specified.
Sub Page Code
Allocation Length The Allocation Length field requests the maximum
number of bytes to transfer.
Control The Control field is present for all SCSI commands. It
is not relevant and is not supported by any SSD
command.
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