Abstract: A write-protected data storage disk assembly comprises a disk carrier having a write-protect member movably mounted thereon for movement between two positions in which it enables and inhibits the writing/erase functions of a disk drive unit. During periods of non-use, the carrier is totally contained by a protective caddy. A write-protect indicator is movably mounted on the caddy, such indicator cooperating with the carrier's write-protect member to display the present write-protect status of the disk within.

Abstract: Disclosed herein is a carrier for a data storage disk. Such carrier comprises means for releasably capturing a disk so that it may be removed by a suitable disk release mechanism and used at a location spaced from the carrier, thereby avoiding any potential for disk damage due to contact with the carrier during disk rotation, and avoiding the need to precisely locate the carrier with a disk drive unit. Preferably, the carrier features enabling disk release are located so the disk release can be effected by the same disk-releasing mechanism no matter which of four different orientations the disk carrier has when inserted into the disk drive unit.