On Wed, Feb 2 at 20:40, Edward Ned Harvey wrote:
Wouldn't multiple platters of the same density still produce a throughput that's a multiple of what it would have been with a single platter? I'm assuming the heads on the multiple platters are all able to operate simultaneously.
Nope. Most HDDs today have a single read channel, and they select which head uses that channel at any point in time. They cannot use multiple heads at the same time, because the heads to not travel the same path on their respective surfaces at the same time. There's no real vertical alignment of the tracks between surfaces, and every surface has its own embedded position information that is used when that surface's head is active. There were attempts at multi-actuator designs with separate servo arms and multiple channels, but mechanically they're too difficult to manufacture at high yields as I understood it. http://www.tomshardware.com/news/seagate-hdd-harddrive,8279.html -- Eric D. Mudama edmud...@bounceswoosh.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
