Technical information

HGST Ultrastar C15K600 Hard Disk Drive Specification
290
18.59.6
Write Data to Echo Buffer (Mode 01010b)
In this mode the Target transfers data into the echo buffer. The echo buffer is assigned in the same manner by the
Target as it would for a WRITE operation. Data will be sent aligned on 4-byte boundaries.
Upon successful completion of a WRITE BUFFER command the data will be preserved in the echo buffer unless
there is an intervening command to any logical unit, in which case it may be changed.
18.59.7
Download Microcode with Offsets, Select Activation Events,
Save, and Defer Activate (Mode 01101b)
In this mode, microcode shall be transferred to the device server using one or more WRITE BUFFER commands,
saved to nonvolatile storage, and considered deferred.
The deferred microcode shall be activated and no longer considered deferred if a WRITE BUFFER command with
the activate deferred microcode mode (0Fh) is processed
The Mode Specific field specifies additional events that shall be used to activate the deferred microcode.
Table 267 Mode Specific Field
Bit
7
6
5
…
PO_ACT
HR_ACT
VSE_ACT
…
If the power on activate (PO_ACT) bit is set to one, then deferred microcode shall be activated and no longer
considered deferred if a power on occurs. If the PO_ACT bit is set to zero, then deferred microcode shall not be
activated if a power on occurs.
The hard reset activate (HR_ACT) bit is not supported.
The vendor specific event activate (VSE_ACT) bit is not supported.
The supported activation events are reported in the POA_SUP bit, HRA_SUP bit, and VSA_SUP bit in the Extended
Inquiry VPD page. If the Mode Specific field specifies an activation event that is not supported (e.g., if the PO_ACT
bit is set to one and the POA_SUP bit is set to zero), then the drive will terminate the command with Check Condition
status with the sense key set to Illegal Request and the additional sense code set to Invalid Field In CDB.
18.59.8
Download Microcode with Offsets, Save, and Defer Activate
(Mode 01110b)
In this mode, microcode shall be transferred to the device server using one or more WRITE BUFFER commands,
saved to nonvolatile storage, and considered deferred.
The deferred microcode shall be activated and no longer considered deferred when one of the following occurs:
a) a power on;
b) a WRITE BUFFER command with the activate deferred microcode mode (0Fh) is processed.
c) a Self Initiated Reset occurs.
18.59.9
Activate Deferred Microcode Mode (Mode 01111b)
In this mode, deferred microcode that has been saved using the download microcode with offsets, save, and defer
activate mode, if any, shall be activated and no longer considered deferred.
The BUFFER ID field, the BUFFER OFFSET field, and PARAMETER LIST LENGTH field shall be ignored in this
mode.
18.59.10
Enable Expander Communications Protocol (Mode 11010b)
In this mode the drive behavior is the same as Write Data to Echo Buffer (Mode 0101b).