Stale track initialization in a storage controller
Deleting a data volume from a storage system and freeing its storage space to make it available to be allocated to a new volume is accomplished by only zeroing associated metadata for the tracks contained in the freed storage space which is then reused in a new volume allocation and an attempt is ma...
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Zusammenfassung: | Deleting a data volume from a storage system and freeing its storage space to make it available to be allocated to a new volume is accomplished by only zeroing associated metadata for the tracks contained in the freed storage space which is then reused in a new volume allocation and an attempt is made by the new volume to read a first record R of a track. A determination is made as to whether a first user record R of the volume is stale If the first record R is stale. If record R is stale, the metadata or track format description (TFD) is modified whereby the entire track is indicated as being uninitialized and the first record R is uninitialized. If record R is not stale, the first record R is regenerated and the TFD is modified whereby the entire track is indicated as being initialized. |
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