On Wed, 20 Dec 2017 07:08:40 -0600, John McKown wrote:
>It's not really a drum, but it is getting closer. Of course, for true
>speed, one should go SSD.
>
>http://www.theregister.co.uk/2017/12/19/seagate_disk_drive_multi_actuator/
>
>[quote]
>
>Seagate is increasing IO performance in disk drives by separating
>read-write heads into two separate sets which can operate independently and
>in parallel.
>
In contrast, the StorageTek SuperDisk had 4 spindles served by a single
X-shaped actuator. It sold poorly at first because the medium wasn't
removable. Then IBM introduced a drive (33xx?) with permanent medium
which somewhat legitimized the market for StorageTek.
There's a legend ("Navy story") of a Univac Fastrand drum mounted on a ship.
The ship made a sharp turn and gyroscopic torque pulled the mounting bolts
out of the deck.
-- gil
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