Micropolis 1550-Series

DRIVE SERIES SPECIFICATIONS

DRIVE SPECIFICATIONS - 1550 Series

Capacity


Model Number
	1554-07	1555-08	1555-09	1556-10	1556-11	1557-12	1557-13	1558-14	1558-15

Unformatted Capacity (MBytes)
	178.4	203.9	229.4	254.9	280.3	305.8	331.1	356.8	382.3

Read/Write Heads
	7	8	9	10	11	12	13	14	15

Formatted Capacity (MBytes)
	157.7	180.3	202.8	225.4	247.9	270.5	293.0	315.5	338.1


(All other specs are common for all members of the 1550 Series)

	Bytes per Sector	512

	Sectors per Track	36

	Cylinders		1,224

	Bytes per Track	20,832

Performance

	Seek Time (including settling time)

		Track-to-Track		4 msec

		Average			18 msec

		Maximum			40 msec


	Avg. Rotational Latency		8.33 msec

	Rotational Speed		3600 rpm +/- 0.5%


	Data Transfer Rate		10 Mbits/sec

	MTBF (power-on hours)		150,000


	Positioner			Fully balanced rotary voice coil

	Parking				Automatic park and lock

General Functional Specifications

	Form-Factor				5 1/4-inch, "full-height"

	Interface				ESDI

	Sectoring				Hard or Soft (set by W1)

	Write Precompensation Start Cylinder	1224 *
	Reduced Write Current Start Cylinder	1224 *
		* These are effectively turned off by specifying a non-existent cylinder.
		  Some systems accomplish this by using a value of "-1".

	Landing Zone				1224

	Mounting Plane				Any orientation


	Drivers/Receivers			Single-ended

Power Requirements

	+12V +/-5%				2.0 A average

	+12V +/-5% (max. during start-up)	4.35 A

	+5V +/-5% (average)			2.0 A


	Power Dissipation, typical		32 Watts

Drive Configuration Information

(Board Layout and Jumper Options)

Drive Warranty Information