removable hard disk definition storage
A type of magnetic disk
, or possibly magneto-optical disk
which is not permanently attached to the disk drive
(not a fixed disk
) but which can be taken out and replaced, allowing many disks to be used in the same drive.
The term "removable disk" would seem to be applicable to floppy disks
but is generally reserved for hard disks
in suitable cartridges such as those made by Syquest, Iomega and others.
Removable disk packs were common on minicomputers
such as the PDP-11
in use in the 1970s except that the drives were the size of washing machines
and the disk packs as big as car wheels. Removable disks became popular on microcomputers
in the 1990s as a cheap way of expanding disk space, transporting large amounts of data between computers and storing backups
. Large, cheap fixed hard disks and USB memory sticks have made removable disks less attractive.