1.0Introduction

This manual describes the functional, mechanical and interface specifications for the following Seagate® Momentus™ 54 drives:

ST94011A

ST94811A

ST92011A

ST92811A

These drives provide the following key features:

5,400-RPM spindle speed and 2-Mbyte buffer (8 Mbytes on ST94811A and ST92811A models) combine for superior performance.

Quiet operation. Fluid Dynamic Bearing (FDB) motor.

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.

800 Gs nonoperating shock, and 225 Gs operating shock.

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.

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).

Figure 1. Momentus 5400.1 disc drive

Momentus 5400.1 Product Manual, Rev. F

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Seagate ST92011A, ST94811A, ST94011A, ST92811A manual Introduction, Momentus 5400.1 disc drive