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...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: Candelaria, Susan K, Lovrien, Kurt A, Marwood, Jr, James D, Peterson, Beth A, Todd, Kenneth W
Format: Patent
Sprache:eng
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
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.