Method, system, and program for demoting tracks from cache
AssigneeInternational Business Machines Corporation
InventorsThomas Jarvis, Michael Hartung, Karl Nielsen, Jeremy Pinson, Steven Lowe
Life of this patent
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Abstract
Provided are a method, system, and program for destaging a track from cache to a storage device. The destaged track is retained in the cache. Verification is made of whether the storage device successfully completed writing data. Indication is made of destaged tracks eligible for removal from the cache that were destaged before the storage device is verified in response to verifying that the storage device is successfully completing the writing of data.
Claims27
A method, comprising:
- destaging a track from cache to a storage device;
- retaining the destaged track in the cache;
- verifying that the storage device is successfully completing writing data;
- and
- indicating destaged tracks eligible for removal from the cache that were destaged before the storage device is verified in response to verifying that the storage device is successfully completing the writing of data.
A system in communication with a storage device, comprising:
- a cache;
- and
- circuitry coupled to the cache and enabled to:
- (i) destage a track from cache to a storage device;
- (ii) retain the destaged track in the cache;
- (iii) verify that the storage device is successfully completing writing data;
- and
- (iv) indicating destaged tracks eligible for removal from the cache that were destaged before the storage device is verified in response to verifying that the storage device is successfully completing the writing of data.
An article of manufacture in communication with a cache and storage device, wherein the article of manufacture is enabled to:
- destage a track from cache to a storage device;
- retain the destaged track in the cache;
- verify that the storage device is successfully completing writing data;
- and
- indicate destaged tracks eligible for removal from the cache that were destaged before the storage device is verified in response to verifying that the storage device is successfully completing the writing of data.
Dependencies are inferred from the claim text.