Boots – shoes – and leggings
Patent
1994-06-10
1995-10-10
Black, Thomas G.
Boots, shoes, and leggings
395180, 364DIG1, 36422281, 3642434, 364246, G06F 1730
Patent
active
054577969
ABSTRACT:
A file system which has component file systems including a primary file system which is react/write and a number of dump file systems which are read only. Each dump file system is created from the primary file system by means of a dump operation and conserves the state of the primary file system at the time the dump operation was performed. Component file systems share read only storage elements with older component file systems. The file system is implemented on a system including a file server, a magnetic disk mass storage device, and an optical write once-read many (WORM) disk. The magnetic disk mass storage device contains the read/write storage elements of the primary file system and encached read only storage elements from the WORM disk. Space is reserved on the unwritten portion of the WORM disk for the read-write storage elements of the primary file system. Techniques for performing file operations including opening, reading, writing, creating, and deleting files are disclosed, as well as techniques for performing the operations of dumping and restoring the primary file system.
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Amsbury Wayne
AT&T IPM Corp.
Black Thomas G.
Nelson Gordon E.
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