Storage system, storage controller, and method for managing mapping between local address and physical address
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United States of America Patent
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Jun 23, 2015
Grant Date -
Oct 2, 2014
app pub date -
Jul 31, 2013
filing date -
Mar 29, 2013
priority date (Note) -
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Abstract
According to one embodiment, a mapping manager of a storage controller changes a first chunk from a second state to a third state if an access condition to the first chunk is a first condition that needs high speed access and the first chunk is in the second state. The second state is a state in which a first logical address of the first chunk is mapped to a first physical address in a second storage device slower and having a larger capacity than a first storage device. In the third state, the first logical address is mapped to a second physical address in the first storage device and also mapped to the first physical address in the second storage device.
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