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<p>(24 GB compressed) on a 125 m cartridge. DDS-3 uses <a href="page.php?w=PRML">PRML (Partial Response Maximum Likelihood)</a> to minimize electronic noise for a cleaner data recording.; DDS-4: DDS-4 stores up to 20 GB uncompressed (40 GB compressed) on a 150 m cartridge. This format is also called DAT 40.; DAT 72: DAT 72 stores up to 36 GB uncompressed (72 GB compressed) on a 170 m cartridge. The DAT 72 standard was developed by HP and <a href="page.php?w=Certance">Certance</a>. It has the same form-factor as DDS-3 and -4 and is sometimes referred</p><p>
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