Seagate 146.8GB HDD ST3146854LC Manual De Usuario

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Cheetah 15K.4 SCSI Product Manual, Rev. B

Cheetah 15K.4 SCSI drives use a dedicated landing zone at the innermost radius of the media to eliminate the 
possibility of destroying or degrading data by landing in the data zone. The drive automatically goes to the 
landing zone when power is removed.

An automatic shipping lock prevents potential damage to the heads and discs that results from movement dur-
ing shipping and handling. The shipping lock automatically disengages when power is applied to the drive and 
the head load process begins.

A high-performance actuator assembly with a low-inertia, balanced, patented, straight-arm design provides 
excellent performance with minimal power dissipation.

The Cheetah 15K.4 SCSI family has the following standard features:

• Integrated Ultra320 SCSI interface.

• Multimode SCSI drivers and receivers—single-ended (SE) and low voltage differential (LVD)

• 16 bit I/O data bus

• Asynchronous and synchronous data transfer protocol

• Firmware downloadable via SCSI interface

• Selectable even byte sector sizes from

512 to 528 bytes/sector

• Programmable sector reallocation scheme

• Flawed sector reallocation at format time

• Programmable auto write and read reallocation

• Reallocation of defects on command (post format)

• ECC burst correction length of up to

288.

• Sealed head and disc assembly

• No preventative maintenance or adjustment required

• Dedicated head landing zone

• Embedded servo design

• Self diagnostics performed when power is applied to the drive

• Zoned bit recording (ZBR)

• Vertical, horizontal, or top down mounting

• Dynamic spindle brake

• 8,192 kbytes data buffer (standard); 32,768 kbytes (optional)

• Hot plug compatibility (Section 9.6.4.2 lists proper host connector needed) for LC model drives

• Drive Self Test (DST)

• Supports SCSI bus fairness

The media used on the drive has an aluminum substrate coated with a thin film magnetic material, overcoated 
with a proprietary protective layer for improved durability and environmental protection.