发明名称 |
HANDLING HIGH PRIROITY REQUESTS IN A SEQUENTIAL ACCESS STORAGE DEVICE HAVING A NON-VOLATILE STORAGE CACHE |
摘要 |
Modified tracks for write requests to a sequential access storage medium in a sequential access storage device are cached in a non-volatile storage, which is a faster access device than the sequential access storage medium. A request queue includes destage requests to destage the modified tracks in the non-volatile storage device to the sequential access storage medium and read requests to access read requested tracks from the sequential access storage medium. A comparison is made of a current position of a read/write mechanism with respect to physical locations on the sequential access storage medium of the tracks subject to the destage requests indicated in the request queue. A determination is made of one of the destage requests to process based on the comparison. The modified track for the determined destage request is written from the non-volatile storage device to the sequential access storage medium. |
申请公布号 |
US2012303869(A1) |
申请公布日期 |
2012.11.29 |
申请号 |
US201213411159 |
申请日期 |
2012.03.02 |
申请人 |
BENHASE MICHAEL T.;GUPTA LOKESH M.;INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
BENHASE MICHAEL T.;GUPTA LOKESH M. |
分类号 |
G06F12/00 |
主分类号 |
G06F12/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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