Seagate ST3400632NS, ST3250823NS, ST3250623NS, ST3400832NS Sustained transfer rate OD Mbytes/sec

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Table 1:	Drive specifications

Drive specification		ST3400832NS	ST3400632NS	ST3250823NS	ST3250623NS

Formatted Gbytes (512 bytes/sector)		400		250

Guaranteed sectors		781,422,768		488,397,168

Bytes per sector		512

Default sectors per track		63

Default read/write heads		16

Default cylinders		16,383

Recording density in BPI (bits/inch max)		763,000

Track density TPI (tracks/inch avg)		120,000

Areal density (Mbits/inch2 avg)		91,560
Spindle speed (RPM)		7,200

Internal data transfer rate (Mbytes/sec		95
max)

Sustained transfer rate OD (Mbytes/sec)		65

I/O data transfer rate (Mbytes/sec max)		150

ATA data-transfer modes supported		PIO modes 0–4
		Multiword DMA modes 0–2
		Ultra DMA modes 0–6

SATA data-transfer modes supported		1.5 Gbits/sec

Cache buffer		8 Mbytes	16 Mbytes	8 Mbytes	16 Mbytes

Height (max)		26.11 mm (1.028 inches)

Width (max)		101.85 mm (4.010 inches)

Length (max)		146.99 mm (5.787 inches)

Weight (max) grams / lb.		635 / 1.39

Average latency (msec)		4.16

Power-on to ready (typical)		10 sec

Standby to ready (typical)		10 sec

Track-to-track seek time (msec typical)		0.8 (read), 1.0 (write)

Average seek, read (msec typical)		8.0

Average seek, write (msec typical)		9.0

Startup current (typical) 12V (peak)		2.8 amps

Seek power (typical) watts		9.9

Operating power (typical) watts		9.2

Idle mode (typical) watts		7.71

Standby mode (typical) watts		1.2

Sleep mode		1.2

Voltage tolerance		5V ± 5%
(including noise)		12V ± 10%

Ambient temperature		0° to 60°C (op.)
		–40° to 70°C (nonop.)

4	NL35 Series SATA Product Manual, Rev. B

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Contents NL35 Series Serial ATA ST3400832NS ST3400632NS ST3250823NS ST3250623NSPage Contents NL35 Series Sata Product Manual, Rev. B List of Figures Page Introduction NL35 Series Serial ATAAbout the Serial ATA interface Drive specifications Specification summary tablesSustained transfer rate OD Mbytes/sec Nonoperating Formatted capacity Default logical geometryLBA mode Cylinders Read/write heads Sectors per track 16,383Seek time Physical characteristicsRecording and interface technology Typical seek times msec Read WritePower specifications Start/stop timesDC power requirements Typical current profilesIdle mode Power-management modesActive mode Sleep modeEnvironmental specifications Acoustics Radio frequency environments Electromagnetic immunityReliability Test Description Performance level Reference standardElectromagnetic compatibility Safety certificationAgency certification Korean RRLAustralian C-Tick N176 Environmental protectionCorrosive environment FCC verificationPage Configuring and mounting the drive Handling and static-discharge precautionsConfiguring the drive Serial ATA cables and connectorsMounting dimensions-top, side and end view Drive mountingNL35 Series Sata Product Manual, Rev. B Serial ATA Sata interface Hot-Plug compatibilitySignal Serial ATA device plug connector pin definitionsSerial ATA connector pin definitions Pin Function DefinitionSupported ATA commands Supported ATA commandsCommand name Command code in hex F4H Identify Device command Word Description ValueXx07H Description if bit is set to Bit Word Bit WordSet Features command Set Features command values3.1 S.M.A.R.T. Command Transport SCT 3 S.M.A.R.T. commandsA.R.T. commands Code in features register A.R.T. commandNL35 Series Sata Product Manual, Rev. B Presales Support Seagate Technology support servicesInternet Technical SupportData Recovery Services Authorized Service Centers Warranty ServiceData Recovery Services Call Center Toll-free Direct dial Index ITE RPM Page Page Seagate Technology LLC