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August 11, 2009

Guzik enhances DTR 3000 Discrete Track Recording Test Systems

Now capable of decoding servo patterns used by hard drive manufacturers

By CBR Staff Writer

Guzik Technical Enterprises has released a new applications note covering the capability of the DTR 3000 Discrete Track Recording Test System to handle data recovery for the hard disk drives.

The DTR 3000 is a test system composed of the DTR 3000 Spinstand, the RWA DTR 3000 series Read-Write Analyser and the WDM 5044 Waveform Digitiser. The media platter can be taken out of the hard drive and placed on spindle of the DTR 3000 Spinstand.

According to the company, the advanced mechanical system of the spinstand can centre the media to eliminate track eccentricity from up to 100 micrometers down to below 800 nanometers.

The company said that the programmable Guzik servo decoder is capable of decoding servo patterns used by hard drive manufacturers and the hard drives based on the discrete track recording technology. The decoder supports both amplitude and chevron-type phase servo burst configurations.

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If the servo information is severely damaged, Guzik spinstands provide positioning using the optical encoder, which allows the user to build three-dimensional maps of the magnetic transitions around the defective areas.

The Guzik DTR 3000 system integrates PRML channel decoder chips in order to read data information from the drive, new channel chips can be integrated upon request. In addition to that, the high-speed WDM5044 digitiser included with DTR 3000 system captures the data with the data rates up to 20GS/s.

If the data is damaged and cannot be decoded using the standard PRML chip designed for the drive, the user can obtain the raw analogue samples and apply custom decoding algorithm in order to recover the degraded information, the company said.

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