Valid Data Compression On SSD
In an embodiment of the invention, a method comprises: obtaining a first data block with a lowest number of valid data from a block record; moving a first valid data in a first memory data area of the first data block to a first pre-erased memory data area in a second data block; and moving a second valid data in a second memory data area in the first data block to a second pre-erased memory data area in the second data block. In another embodiment of the invention, an article of manufacture comprises: a non-transient computer-readable medium having stored thereon instructions that are configured to: obtain a first data block with a lowest number of valid data from a block record; move a first valid data in a first memory data area of the first data block to a first pre-erased memory data area in a second data block; and move a second valid data in a second memory data area in the first data block to a second pre-erased memory data area in the second data block. In yet another embodiment of the invention, an apparatus comprises: a data storage system configured to: obtain a first data block with a lowest number of valid data from a block record; move a first valid data in a first memory data area of the first data block to a first pre-erased memory data area in a second data block; and move a second valid data in a second memory data area in the first data block to a second pre-erased memory data area in the second data block.
1 . A method, comprising:
obtaining a first data block with a lowest number of valid data from a block record;
moving a first valid data in a first memory data area of the first data block to a first pre-erased memory data area in a second data block; and
moving a second valid data in a second memory data area in the first data block to a second pre-erased memory data area in the second data block.
2 . The method of claim 1 , wherein the first data block becomes a candidate for erasure after all memory data areas in the first data block become invalid.
3 . The method of claim 1 , further comprising:
erasing the first data block after all memory data areas in the first data block become invalid.
4 . The method of claim 1 , further comprising:
moving a third valid data in the first data block to a third pre-erased memory data area in a third data block.
5 . The method of claim 1 , further comprising:
moving each valid data in the first data block to a given pre-erased memory data area in either the second data block or third data block.
6 . The method of claim 1 , wherein the first valid data is in a first section of a first page of the first data block and wherein the second valid data is in a section of a page that does not contain the first valid data; and
wherein the first pre-erased memory data area is a given section of a given page in the second data block.
7 . The method of claim 1 , further comprising:
changing a compacting flag to end a compacting process on the first data block.
8 . An article of manufacture, comprising:
a non-transient computer-readable medium having stored thereon instructions that are configured to:
obtain a first data block with a lowest number of valid data from a block record;
move a first valid data in a first memory data area of the first data block to a first pre-erased memory data area in a second data block; and
move a second valid data in a second memory data area in the first data block to a second pre-erased memory data area in the second data block.
9 . The article of manufacture of claim 8 , wherein the first data block becomes a candidate for erasure after all memory data areas in the first data block become invalid.
10 . The article of manufacture of claim 8 , wherein the instructions are further configured to:
erase the first data block after all memory data areas in the first data block become invalid.
11 . The article of manufacture of claim 8 , wherein the instructions are further configured to:
move a third valid data in the first data block to a third pre-erased memory data area in a third data block.
12 . The article of manufacture of claim 8 , wherein the first valid data is in a first section of a first page of the first data block and wherein the second valid data is in a section of a page that does not contain the first valid data; and
wherein the first pre-erased memory data area is a given section of a given page in the second data block.
13 . The article of manufacture of claim 8 , wherein the instructions are further configured to:
move each valid data in the first data block to a given pre-erased memory data area in either the second data block or third data block.
14 . An apparatus, comprising:
a data storage system configured to:
obtain a first data block with a lowest number of valid data from a block record;
move a first valid data in a first memory data area of the first data block to a first pre-erased memory data area in a second data block; and
move a second valid data in a second memory data area in the first data block to a second pre-erased memory data area in the second data block.
15 . The apparatus of claim 14 , wherein the first data block becomes a candidate for erasure after all memory data areas in the first data block become invalid.
16 . The apparatus of claim 14 , wherein the data storage system is further configured to:
erase the first data block after all memory data areas in the first data block become invalid.
17 . The apparatus of claim 14 , wherein the data storage system is further configured to:
move a third valid data in the first data block to a third pre-erased memory data area in a third data block.
18 . The apparatus of claim 14 , wherein the data storage system is further configured to:
move each valid data in the first data block to a given pre-erased memory data area in either the second data block or third data block.
19 . The apparatus of claim 14 , wherein the first valid data is in a first section of a first page of the first data block and wherein the second valid data is in a section of a page that does not contain the first valid data; and
wherein the first pre-erased memory data area is a given section of a given page in the second data block.
20 . The apparatus of claim 14 , wherein the data storage system is further configured to:
change a compacting flag to end a compacting process on the first data block.