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Travelstar 5K160 (SATA) Hard Disk Drive Specification
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9 Deviations from Standard
The device conforms to the referenced specifications, with deviations described below.
The interface conforms to the Working Document of Information Technology, AT Attachment with
Packet Interface Extension (ATA/ATAPI-7) Revision 4b dated 21 Apr. 2004, with deviation as
follows:
S.M.A.R.T. Return Status
S.M.A.R.T. RETURN STATUS subcommand does not check advisory attributes.
That is, the device will not report threshold exceeded condition unless pre-failure
attributes exceed their corresponding thresholds. For example, Power-On Hours
Attribute never results in negative reliability status.
Check Power Mode
Check Power Mode command returns FFh to Sector Count Register when the device
is in Idle mode. This command does not support 80h as the return value.
10 Physical Interface
Physical Interface is described in “Part1 Functional Specification” section
11 Registers
In Serial ATA, the host adapter contains a set of registers that shadow the contents of the traditional
device registers, referred to as the Shadow Register Block. Shadow Register Block registers are
interface registers used for delivering commands to the device or posting status from the device.
About details, please refer to the Serial ATA Specification.
In the following cases, the host adapter sets the BSY bit in its shadow Status Register and transmits
a FIS to the device containing the new contents.
• Command register is written in the Shadow Register Block
• Device Control register is written in the Shadow Register Block with a change of state of the
SRST bit
• COMRESET is requested
11.1 Register naming convention
This specification uses the same naming conventions for the Command Block Registers as the
ATA/ATAPI-7 standard. However, the register naming convention is different from that uses in the
Serial ATA 1.0a specification. Table 24 defines the corresponding of the register names used in this
specification with those used in the Serial ATA 1.0a specification.
Serial ATA register name
Register name in this
specification when writing
registers
Register name in this
specification when reading
registers
Features Feature current
Features (exp) Feature previous
Sector count Sector count current Sector count HOB=0
Sector count (exp) Sector count previous Sector count HOB=1
Sector number LBA low current LBA low HOB=0
Sector number (exp) LBA low previous LBA low HOB=1
Cylinder low LBA mid current LBA mid HOB=0
Cylinder low (exp) LBA mid previous LBA mid HOB=1