U8 Family Product Manual, Rev. B | 7 |
•Track-to-track seek time is an average of all possible single-track seeks in both directions.
•Average seek time is a true statistical random average of at least 5,000 measurements of seeks between random tracks, less overhead.
•Full-stroke seek time is one-half the time needed to seek from the first data cylinder to the maximum data cylinder and back to the first data cylinder. The full-stroke typical value is determined by averaging 100 full-stroke seeks in both directions.
Typical seek times (msec) | Read | Write |
| | |
| | |
Track-to-track | 1.5 | 2.1 |
| | |
Average | 10.5 | 11.5 |
| | |
Full-stroke | 23.0 | 25.0 |
| | |
Average latency: 5.56 msec | — | — |
| | |
Note. These drives are designed to consistently meet the seek times rep- resented in this manual. Physical seeks, regardless of mode (such as track-to-track and average) are expected to meet or exceed the noted values. However, due to the manner in which these drives are format- ted, benchmark tests that include command overhead or measure logical seeks may produce results that vary from these specifications.
1.6 Start/stop times
Power-on to Ready (sec) | 10 (typical) |
Standby to Ready (sec) | 10 (typical) |
Ready to spindle stop (sec) | 10 (typical) |
1.7 Power specifications
The drive receives DC power (+5V or +12V) through a four-pin standard drive power connector.
1.7.1 Power consumption
Power requirements for the drives are listed in the table on page 9. Typical power measurements are based on an average of drives tested, under nominal conditions, using 5.0V input voltage at 25°C ambient temperature.
•Spinup power
Spinup power is measured from the time of power-on to the time that the drive spindle reaches operating speed.
ST38410A, ST34313A
U8 Family
ST317221A, ST313021A
Ultra ATA Interface Drives
ST38410A, ST34313A
U8 Family
ST317221A, ST313021A
Ultra ATA Interface Drives
Page
Contents
U8 Family Product Manual, Rev. B
Configuring and mounting the drive
ATA interface
Figures
U8 Family Product Manual, Rev. B
Introduction
ST317221A
Specification summary table
Drive Specification
ST313021A
ST317221A
0 to 60C op., -40 to 70C nonop
ST313021A
1.1 Formatted capacity
1.0 Drive specifications
1.1.1 Default logical geometry
1.2 Physical organization
1.3 Recording and interface technology
1.4 Physical characteristics
Drive Specification
1.5 Seek time
Spinup power
1.7 Power specifications
1.7.1 Power consumption
1.6 Start/stop times
Idle mode power
Read/Write power and current
Operating power and current
Seek Mode
Typical Watts
Power Mode
1.7.1.1 Typical current profile
Typical Amps RMS
1.7.2 Conducted noise
1.7.4 Power-management modes
Power Modes
1.7.3 Voltage tolerance
1.8.2 Temperature gradient
Idle and Standby timers
1.8 Environmental tolerances 1.8.1 Ambient temperature
Sleep mode
1.8.3 Humidity
1.9 Drive acoustics
1.8.6.1 Operating vibration
1.8.6.2 Nonoperating vibration
1.11 Reliability
1.12 Agency certification 1.12.1 Safety certification
1.10 Electromagnetic susceptibility
1.12.2 Electromagnetic compatibility
1.12.3 FCC verification
Australian CE-Tick N176
U8 Family Product Manual, Rev. B
2.0 Configuring and mounting the drive
2.1 Handling and static-discharge precautions
Options jumper block J8 Master or single drive Drive is slave
2.2 Jumper settings 2.2.1 Master/slave configuration
7 5 3 8 6 4
Cable select
2.3 Drive mounting
2.2.2 Cable-select option
2.2.3 Ultra ATA/66 cable
Figure 3. Mounting dimensions-top, side and end view
Note Dimensions are shown in inches mm
3.0 ATA interface
3.1 ATA interface signals and connector pins
Host pin # and signal description
Figure 4. I/O pins and supported ATA signals
Signal name
Drive pin #
Command code in hex
3.1.1 Supported ATA commands
Command name
ATA-standard commands
3.1.2 Identify Drive command
Command code in hex
x.xx
Word
Description
Value
xxxxH
xx07H
xx1FH
Bit Word
xxA5H
Description if bit is set to Bit Word
3.1.3 Set Features command
Set transfer mode based on value in Sector Count register
S.M.A.R.T. Command
3.1.4 S.M.A.R.T. commands
Code in Features
Register
Code in Features
Page
Page
Publication Number SG35226-001, Rev. B, Printed in USA
Seagate Technology, Inc
920 Disc Drive, Scotts Valley, California 95066, USA