EMULATION OF DISSIMILAR REMOVABLE MEDIUM STORAGE DEVICE TYPES ASSISTED BY INFORMATION EMBEDDED IN THE LOGICAL FORMAT
The present invention provides systems and methods for allowing a holographic storage device to emulate optical WORM drives and tape drives.
1 . An article comprising:
a holographic storage medium;
one or more data pages stored on the holographic storage medium; and
a drive emulation table stored in the holographic storage medium that allows the holographic storage medium to emulate an optical WORM drive or tape drive when the one or more data pages are read.
2 . The article of claim 1 , wherein the drive emulation table allows the holographic storage medium to emulate an optical WORM drive when the one or more data pages are read.
3 . The article of claim 2 , wherein the drive emulation table includes an LBA map for allowing randomly written data pages to be read as sequentially stored data.
4 . The article of claim 1 , wherein the drive emulation table allows the holographic storage medium to emulate a tape drive when the one or more data pages are read.
5 . The article of claim 4 , wherein the tape drive is an LTO tape drive.
6 . The article of claim 4 , wherein the drive emulation table includes file marks to emulate fast positioning of a tape drive to a filemark location.
7 . A method comprising the following steps:
(a) storing one or more data pages in a holographic storage medium; and
(b) storing a drive emulation table the holographic storage medium that allows the holographic storage medium to emulate an optical WORM drive or a tape drive when the one or more data pages are read.
8 . The method of claim 7 , wherein the drive emulation table allows the holographic storage medium to emulate an optical WORM drive when the one or more data pages are read.
9 . The method of claim 8 , wherein the drive emulation table includes an LBA map for allowing randomly written data pages to be read as sequentially stored data.
10 . The method of claim 7 , wherein the drive emulation table allows the holographic storage medium to emulate a tape drive when the one or more data pages are read.
11 . The method of claim 10 , wherein the tape drive is an LTO tape drive.
12 . The method of claim 10 , wherein the drive emulation table includes file marks for allowing randomly written data pages to be read as sequentially stored data.
13 . A method comprising the following steps:
(a) providing a holographic storage medium having one or more data pages and a drive emulation table stored therein; and
(b) reading the one or more data pages as if the one or more data pages were stored as data blocks in an optical WORM drive, wherein the drive emulation table allows the holographic storage medium to emulate an optical WORM drive in step (b).
14 . The method of claim 13 , wherein the drive emulation table includes an LBA map for allowing randomly written data pages to be read as sequentially stored data.
15 . A method comprising the following steps:
(a) providing a holographic storage medium having one or more data pages and a drive emulation table stored therein; and
(b) reading the one or more data pages as if the one or more data pages were stored as data blocks in a tape drive, wherein the drive emulation table allows the holographic storage medium to emulate tape drive in step (b).
16 . The method of claim 15 , wherein the tape drive is an LTO tape drive
17 . The method of claim 15 , wherein the drive emulation table includes an LBA map for allowing randomly written data pages to be read as sequentially stored data.