Systems and methods for storage medium management

A method implemented on a storage management device having a storage medium storing files and a set of instructions and at least one processor executing the set of instructions for managing the files stored in the storage medium, the method comprising:

• obtaining file information of a file stored in the storage medium, wherein the file includes at least two data fragments, each two of the at least two data fragments are stored separately in two discontinuous storage units in the storage medium, wherein the file information includes a number of storage units in the storage medium for storing the at least two data fragments, wherein the storage medium is a single disk or a disk array;
• determining a first parameter of the file according to the file information, wherein the first parameter represents an integrity of the at least two data fragments in the storage medium, wherein the determining the first parameter of the file according to the file information includes:
• if the storage medium is the disk array,
• determining a second type of data fragments and a third type of data fragments in the file according to the file information, wherein
• the number of the storage units that each of the second type of data fragments occupies is an integer multiple of a second preset value and a start position and an end position of the each of second type of data fragments are aligned to a stripe width of the storage medium, and
• the number of the storage units that each of the third data fragments occupies is an integer multiple of a second preset value and at least one of a start position or an end position of the each of the second type of data fragments are unaligned to a stripe width of the storage medium;
• determining a second ratio of the number of the second type of data fragments and the third type of data fragments to a total number of the at least two data fragments;
• and
• designating the second ratio as the first parameter of the file;
• determining whether the first parameter is equal to or smaller than a preset threshold;
• and
• defragmenting the at least two data fragments in the storage medium if the first parameter is equal to or smaller than the preset threshold.

A non-transitory computer readable medium, comprising executable instructions that, when executed by at least one processor, directs the at least one processor to perform operations comprising:

• obtaining file information of a file stored in a storage medium, wherein the file includes at least two data fragments, each two of the at least two data fragments are stored separately in two discontinuous storage units in the storage medium, wherein the file information includes a number of storage units in the storage medium for storing the at least two data fragments, wherein the storage medium is a single disk or a disk array;
• determining a first parameter of the file according to the file information, wherein the first parameter represents an integrity of the at least two data fragments in the storage medium, wherein the determining the first parameter of the file according to the file information includes:
• if the storage medium is the disk array,
• determining a second type of data fragments and a third type of data fragments in the file according to the file information, wherein
• the number of the storage units that each of the second type of data fragments occupies is an integer multiple of a second preset value and a start position and an end position of the each of second type of data fragments are aligned to a stripe width of the storage medium, and
• the number of the storage units that each of the third data fragments occupies is an integer multiple of a second preset value and at least one of a start position or an end position of the each of the second type of data fragments are unaligned to a stripe width of the storage medium;
• determining a second ratio of the number of the second type of data fragments and the third type of data fragments to a total number of the at least two data fragments;
• and
• designating the second ratio as the first parameter of the file;
• determining whether the first parameter is equal to or smaller than a preset threshold;
• and
• defragmenting the at least two data fragments in the storage medium if the first parameter is equal to or smaller than the preset threshold.