![]() ![]() ![]() In the second half of this year, Seagate will begin shipping drives that use SMR to squeeze more data onto disks by overlapping the data tracks on them like shingles on a roof, says Fang Zhang, a storage analyst at IHS iSuppli. Disk Density Gets Higher StillĪfter about 10 years of steadily increasing densities, disks that use perpendicular magnetic recording (PMR) are topping out at about 1TB per square inch, says Mark Re, a senior vice president at storage vendor Seagate Technology. In the meantime, they are holding down costs - and boosting data access - with software that virtualizes, deduplicates and caches data on commodity disk drives, solid-state drives (SSD) and server-side flash memory. With existing hard drive technologies ending their decade-long run of ever-increasing densities, IT shops are waiting for new technologies such as shingled magnetic recording (SMR) and phase-change memory (PCM) to boost storage densities.
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