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10Ultra DMA mode 2 is currently active.
11Ultra DMA mode 3 is currently active.
12Ultra DMA mode 4 is currently active.
13Ultra DMA mode 5 is currently active.
14Ultra DMA mode 6 is currently active.
4.3.2Set Features command
This command controls the implementation of various features that the drive supports. When the drive receives this command, it sets BSY, checks the contents of the Features register, clears BSY and generates an interrupt. If the value in the register does not represent a feature that the drive supports, the command is aborted. Power-on default has the read look-ahead and write caching features enabled. The acceptable values for the Features register are defined as follows:
Table 8 Set Features command values
02H | Enable write cache (default). |
03H | Set transfer mode (based on value in Sector Count register). |
| Sector Count register values: |
| |
| 00H Set PIO mode to default (PIO mode 2). |
| 01H Set PIO mode to default and disable IORDY (PIO mode 2). |
| 08H PIO mode 0 |
| 09H PIO mode 1 |
| 0AH PIO mode 2 |
| 0BH PIO mode 3 |
| 0CH PIO mode 4 (default) |
| 20H Multiword DMA mode 0 |
| 21H Multiword DMA mode 1 |
| 22H Multiword DMA mode 2 |
| 40H Ultra DMA mode 0 |
| 41H Ultra DMA mode 1 |
| 42H Ultra DMA mode 2 |
| 43H Ultra DMA mode 3 |
| 44H Ultra DMA mode 4 |
| 45H Ultra DMA mode 5 |
| 46H Ultra DMA mode 6 |
10H | Enable use of SATA features |
55H | Disable read look-ahead (read cache) feature. |
82H | Disable write cache |
90H | Disable use of SATA features |
AAH | Enable read look-ahead (read cache) feature (default). |
Barracuda XT SATA Product Manual, Rev. D | 35 |
100586689 Rev. D September
BarracudaXT
Revision Date Description of changes
Revision History
Contents
Barracuda XT Sata Product Manual, Rev. D
Figures
Barracuda XT Sata Product Manual, Rev. D
Seagate Technology Support Services
Barracuda XT Sata Product Manual, Rev. D
About the Serial ATA interface
Introduction
Drive Specifications
Formatted capacity
LBA mode
Default logical geometry
Start/stop times
Physical characteristics
Power specifications
Recording and interface technology
Standby mode
Read/write power and current
Operating power and current
Idle mode power
Typical 12V startup and operation current profiles 3000GB
Typical 5V startup and operation current profiles 3000GB
Typical 12V startup and current profiles 2000GB
Typical 5V startup and current profiles 2000GB
Voltage tolerance
Power management modes
Conducted noise
Altitude
Environmental specifications Ambient temperature
Temperature gradient
Humidity
Acoustics
Shock
Vibration
Test Description Performance level Reference Standard
Test for Prominent Discrete Tones PDTs
Electromagnetic immunity
FCC verification
Warranty
Agency certification Safety certification
Electromagnetic Compatibility EMC
Corrosive environment
Environmental protection
China Restriction of Hazardous Substances RoHS Directive
Drive Specifications
Serial ATA cables and connectors
Handling and static-discharge precautions
Configuring the drive
Attaching Sata cabling
Drive mounting
Mounting dimensions 3000GB model
Mounting dimensions 2000GB model
Ground 2nd mate
3V power
Segment Pin Function Definition
P14
3V power, pre-charge, 2nd mate
12V power, pre-charge, 2nd mate
12V power
Command name Command code in hex
Supported ATA commands
Command name
Word Description Value
Identify Device command
57-58 Current capacity in sectors
Or Write Multiple command
Number of current logical heads
Number of current logical sectors per logical track
Fffeh
BE01H
00DEH
Bit Word
AAH
Set Features command
Enable read look-ahead read cache feature default
Code in features register A.R.T. command
3 S.M.A.R.T. commands
Barracuda XT Sata Product Manual, Rev. D
Master/slave 9 mounting
Barracuda XT Sata Product Manual, Rev. D
Barracuda XT Sata Product Manual, Rev. D
Barracuda XT Sata Product Manual, Rev. D
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