38results about "Linear tape open format" patented technology

In one embodiment, a method includes loading a tape cartridge into at least one tape drive installed in an automated tape library, where a tape of the tape cartridge has at least two partitions; writing plurality of data blocks on a first of the partitions; and writing an index on a second of the partitions, wherein the index includes information about at least one of files and the blocks on the first partition.

An unencoded m-bit data input sequence is divided into a block of n bits and a block of m-n bits. The block of n bits is divided into a first set of n+1 encoded bits, wherein at least one of P1 subblocks of the first set satisfies a G, M and I constraints. The first set of n+1 encoded bits is mapped into a second set of n+1 encoded bits wherein at least one of P2 subblocks of the second set gives rise to at least Q1 transitions after 1 / (1+D2) precoding. A second set of n+1 encoded bits is divided into P3 encoded subblocks and the P3 encoded subblocks are interleaved among (m−n) / s unencoded symbols so as to form a (m+1)-bit output sequence codeword which is then stored on a data storage medium.

An object of the present invention is to embed information while making effective use of a recording area at the time of recording data. To this end, a controller in a tape drive includes: a storage unit which stores information desired to be embedded; an acquisition unit which acquires the information stored in the storage unit; a writing unit which repeatedly writes a CQ set determined on the basis of the acquired information the number of times determined on the basis of this information; a reading unit which reads data in which information is embedded; and an identification unit which identifies information embedded in the read data, and which determines whether or not the read data can be used and the like, in comparison with this information and the information stored in the storage unit.

In one embodiment, a data storage system includes a write channel for writing data to a storage medium, the write channel configured to utilize a partial reverse concatenated modulation code. The write channel includes logic adapted for encoding data sets using a C2 encoding scheme, logic adapted for adding a header to each subunit of the data sets, logic adapted for encoding the headers of the data sets with a first modulation encoding scheme, logic adapted for encoding data portions of the data sets with a second modulation encoding scheme, logic adapted for encoding portions of the one or more C2-encoded data sets using a C1 encoding scheme, logic adapted for combining the C1-encoded portions with the modulation-encoded headers of the C2-encoded data sets using a multiplexer, and logic adapted for writing the one or more combined C1 - and C2-encoded data sets to data tracks.