Back to results
US 8,077,417 B2Granted
Skip block writing for bit patterned media write synchronization
AssigneeSeagate Technology LLC
InventorsMichael Leigh Mallary, Walter Richard Eppler, Werner Scholz
Life of this patent
Estimating the term…
Abstract
A method for synchronizing writing to a bit patterned media includes: reading bits from skipped blocks on the bit patterned media, using timing of bits read from the skipped blocks to update a write clock, and writing request data to physical blocks on the bit patterned media, interleaved with the skipped blocks. An apparatus that operates in accordance with the method is also provided.
Claims20
A method for synchronizing writing to a bit patterned media, the method comprising:
- reading previously written user data bits from skipped physical blocks in data sectors on the bit patterned media;
- using timing of the previously written user data bits read from the skipped blocks to update a write clock;
- and
- writing request data to other physical blocks on the bit patterned media, interleaved with the skipped blocks.
1 more element
An apparatus comprising:
- a bit patterned storage media;
- a recording head for reading bits from the storage media and writing data to the storage media, wherein the recording head reads previously written user data bits from skipped physical blocks in data sectors on the storage media;
- and
- a controller including a write clock, wherein timing of the previously written user data bits read from the skipped physical blocks is used to update a write clock, and the recording head writes request data to other physical blocks on the storage media, interleaved with the skipped physical blocks.
1 more element
An apparatus comprising:
- a bit patterned storage media;
- a recording head for reading bits from the storage media and writing data to the storage media, wherein the recording head reads previously written user data bits from skipped physical blocks in data sectors on the storage media;
- and
- a controller including a write clock, wherein timing of the previously written user data bits read from the skipped physical blocks is used to update a write clock, and the recording head writes request data to other physical blocks on the storage media, interleaved with the skipped physical blocks, wherein the controller reverses a current in an ampere wire adjacent to a write pole in a write head to actively cancel a write field after writing a last bit in at least one of the other physical blocks.
1 more element
Dependencies are inferred from the claim text.