Micropolis 4345-Series

DRIVE SERIES SPECIFICATIONS

DRIVE SPECIFICATIONS - Tomahawk 4LP Family

The 434X Tomahawk family is the lower capacity, half-height 3.5-inch (1 inch high) version of the higher capacity but full-height 3.5-inch drives from the 3391 series.

Tomahawk 4LP MODELS: 4345NS / 4345WS / 4345SS / 4345WD / 4345SD

(See Tomahawk 4LP AV Models: 4345AV and 4345WAV)
(See Tomahawk 9 Models: 3391XX)

Example Video (4345WS)

Formatted Capacity

Per Drive		4.55 GB

Bytes per Sector	512

Sectors per Track	Variable
	
Cylinders		4,811

Performance

Data Rate

Avg. Seek Time (including settling time)	7.9 msec

Avg. Rotational Latency				4.17 msec

Rotational Speed				7200 rpm +/- 0.5%

Data Transfer Rate at Interface

Wide Synchronous		up to 40 MB/sec

Narrow Synchronous		up to 20 MB/sec

Asynchronous			up to 10 MB/sec

Internal Data Rate		76 to 125 Mbits/sec

MTBF (power-on hours)		1,000,000 (Computer-room environment)

				650,000 (Office environment)

Positioner			Fully balanced rotary voice coil

Parking				Automatic park and lock

General Functional Specifications

Interface				Ultra SCSI (SCSI-3)

Supports Full Common Command Set	Yes

Drivers/Receivers Available:

   8-Bit ("Narrow") Single-Ended, Standard 50-pin Connector (Model 4345NS)

   16-Bit Wide/Single-Ended, 68-pin Unitized Connector (Model 4345WS)

   16-Bit Wide/Single-Ended 80-pin SCA-2 Connector (Model 4345SS)

Power Requirements

+12V +/-5% (average)			0.55 A

+12V +/-5% (max during start-up)	1.75 A

+5V +/-5% (average)			1.10 A



Power Dissipation, typical, idling	10 Watts

Power Dissipation, typical, seeking	12 Watts

Drive Configuration Information

Click on the drive model for Configuration/Specification Data Sheets in Adobe Acrobat format.

Model 4345NS, (8-Bit), "Narrow"/ Single-Ended, Standard 50-pin Connector
Model 4345WS, (16-Bit), Wide/ Single-Ended, 68-pin Unitized Connector
Model 4345WD, (16 bit), Wide/ Differential, 68-pin connector
Model 4345SS, (16-Bit), Wide/ Single-Ended, 80-pin SCA-2 Connector
Model 4345SD, (16 bit), Wide/ Differential, 80-pin SCA-2 connector