Seagate DB35 Series 7200.2 Introduction

This manual describes the functional, mechanical and interface specifications for the following Seagate DB35 Series 7200.2 model drives: 

• ST3500841ACE
• ST3400833ACE
• ST3300822ACE
• ST3250824ACE
• ST3200827ACE
• ST3160212ACE
• ST3120213ACE
• ST3802110ACE

These drives provide the following key features:

• Minimal acoustics for consumer storage usage profile.
• Bedroom quiet performance.
• Optimized power for consumer storage devices.
• Spinup current limited to a maximum of 2 amps.
• 7,200-RPM spindle speed
• 8-Mbyte buffer: ST3500841ACE, ST3400833ACE, ST3300822ACE, ST3250824ACE, and ST3200827ACE.
• 2-Mbyte buffer: ST3160212ACE, ST3120213ACE, and ST3802110ACE.
• High instantaneous (burst) data transfer rates (up to 100 Mbytes per second) using Ultra DMA mode 5.
• Tunneling Magnetoresistive (TMR) recording heads.
• State-of-the-art cache and on-the-fly error-correction algorithms.
• Full-track multiple-sector transfer capability without local processor intervention.
• 350 Gs nonoperating shock.
• Support for S.M.A.R.T. drive monitoring and reporting.
• Support for Read Multiple and Write Multiple commands.
• Support for autodetection of master/slave drives that use cable select (CSEL).
• SeaTools diagnostic software performs a drive self-test that eliminates unnecessary drive returns.
• The 3D Defense System, which includes Drive Defense, Data Defense, and Diagnostic Defense, offers the industry’s most comprehensive protection for disc drives.

2.0 Drive specifications

Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal power. For convenience, the phrases the drive and this drive are used throughout this manual to indicate the following models:    

ST3500841ACE ST3250824ACE ST3120213ACE
ST3400833ACE ST3200827ACE ST3802110ACE
ST3300822ACE ST3160212ACE

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.See Section 4.1.2, "Identify Device command" (words 60-61 and 100-103) for additional information about 48-bit addressing support of drives with capacities over 137 Gbytes.

Power specifications

The drive receives DC power (+5V and +12V) through a four-pin standard drive power connector.

Power consumption

Power requirements for the drives are listed in the table on page 13. 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 disc 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 random seeks with read or write latency time. This mode is not typical and is provided for worst-case information.

• Operating power and current

Operating power is measured using a standard Consumer Storage Profile.

• 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 location.

• 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.

Conducted noise

Input noise ripple is measured at the host system power supply across an equivalent 80-ohm resistive load on the +12 volt line or an equivalent 15-ohm resistive load on the +5 volt line.

• Using 12-volt power, the drive is expected to operate with a maximum of 120 mV peak-to-peak square-wave injected noise at up to 10 MHz.

• Using 5-volt power, the drive is expected to operate with a maximum of 100 mV peak-to-peak square-wave
injected noise at up to 10 MHz.

Note. Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write
current.

Voltage tolerance (including noise):

5V ± 5%  
12V ± 10%