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Tag Archives: hard drive

The Case of Decimal v. Binary

We all know that disk drive manufacturers have been conning us for years with their definition of what constitutes a gigabyte. There are two schools of thought; the binary GB, which is 1024x1024x1024 or 1,073,741,824 bytes and the decimal GB which is quoted as 1000x1000x1000 or 1 billion bytes. The difference is significant (7.4%) and something that has annoyed me ... Read More »

Disk Sizes Continue to Dazzle

HGST (Hitachi Global Storage Technologies) announced yesterday that they have managed to further miniaturise the drive heads they use in the hard disk drives. I hadn’t realised exactly how small these recording heads were; apparently 2000 times smaller than the width of a human hair. Called “current perpendicular-to-the-plane giant magnetoresistive1 (CPP-GMR) heads” (I copied that from the press release to ... Read More »

Your Data on a Knife Edge

I read this interesting article on the BBC website today. It talks about how two European scientists (Albert Fert and Peter Grunberg) have won the Nobel prize for physics for GMR (giant magnetoresistance). This technology has enabled hard drives to be made smaller and to hold more data. What I liked most was the following comment, used to describe the ... Read More »

Tower of Tera

Lots of talk today about the 1 terabyte drive from Hitachi. In fact the drive is more likely to be about 931GB based on the dubious practice of using decimal 1000’s rather than binary (whilst we’re on that subject, the concept of decimal versus binary does annoy me – what with that and overhead, on some of the AMS’s I’ve ... Read More »

Hybrid Storage Alliance

Fujitsu, Hitachi, Toshiba, Samsung and Seagate are getting together as the Hybrid Storage Alliance to promote the use of HDDs with large amounts of additional cache. They’ve set up a (not so snazzy) website at www.hybridstorage.org (check out the builder on the features page – when did you last see a builder using a laptop, never mind understanding what a ... Read More »