Table of Contents
Advertisement
LBA mode
When addressing these drives in LBA mode, all blocks (sectors) are consecutively numbered from 0 to n–1, where n is the number of
guaranteed sectors as defined above.
2.4
Recording and interface technology
Interface
Recording method
Recording density, KBPI (Kb/in max)
Track density, KTPI (ktracks/in avg)
2
Areal density (Gb/in
avg)
Spindle speed (RPM) (± 0.2%)
Internal data transfer rate (Mb/s max)
Sustained data transfer rate (MB/s max)
I/O data-transfer rate (MB/s max)
2.5
Start/stop times
Power-on to Ready (sec)
Standby to Ready (sec)
Ready to spindle stop (sec)
2.6
Power specifications
The drive receives DC power (+5V or +12V) through a native SATA power connector. See Figure 10 on page 26.
2.6.1
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 and 12.0V 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.
• Seek mode
During seek mode, the read/write actuator arm moves toward a specific position on the disk surface and does not execute a read
or write operation. Servo electronics are active. Seek mode power represents the worst-case power consumption, using only ran-
dom seeks with read or write latency time. This mode is not typical and is provided for worst-case information.
• Read/write power and current
Read/write power is measured with the heads on track, based on a 16-sector write followed by a 32-ms delay, then a 16-sector
read followed by a 32ms delay.
• Operating power and current
Operating power is measured using 40 percent random seeks, 40 percent read/write mode (1 write for each 10 reads) and 20 per-
cent drive idle mode.
• Idle mode power
Idle mode power is measured with the drive up to speed, with servo electronics active and with the heads in a random track loca-
tion.
• Standby mode
During Standby mode, the drive accepts commands, but the drive is not spinning, and the servo and read/write electronics are in
power-down mode.
Constellation ES.3 Serial ATA Product Manual, Rev. F
4TB models
3TB models
Serial ATA (SATA)
Perpendicular
1862
305
566
7200
2160
175
600 (Ultra DMA mode 5)
2TB models
20 (max)
20 (max)
20 (max)
1TB models
8
Advertisement
Table of Contents
