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Marvell Charges Up SATA: Page 2 of 2

"You've still got Fibre Channel at the high end, shipping to banking or financial institution customers. But there's a new segment," Williams says.

One example could be in near-line storage, sitting in front of tape drives as a kind of near-term cache. Data could be backed up to Serial ATA II drives first, taking advantage of their speed, and then moved to tape if the data goes untouched for, say, 90 days.

Serial ATA drives could also find uses in RAID arrays, where built-in redundancy means the architecture can tolerate the occasional drive failure. "A Serial ATA drive might fail more often than a Fibre Channel drive, but it's so cheap, you just rip it out and replace it," Williams says.

Drive manufacturers are already testing the approach. For example, Western Digital Corp. (NYSE: WDC) has been pushing RAID applications for its WD Raptor line of Serial ATA drives (see Western Digital Hatches Raptor, Intel OKs WD's Raptor, and WD Raptor OK'd for Promise