Storage apparatus, computer system, and method for improved read operation handling
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United States of America Patent
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Oct 22, 2019
Grant Date -
Jan 18, 2018
app pub date -
Jan 28, 2015
filing date -
Jan 28, 2015
priority date (Note) -
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Abstract
The processor provides a host computer with a logical volume based on a physical storage device. Based on a command from the host computer, the control device writes, into a memory, address information that associates a logical address in the logical volume with a device address in the physical storage device. The control device receives a command from the host computer and if it is determined that the command is a read command, identifies a first logical address designated by the command and determines whether or not the first logical address is included in the address information. If the first address is included in the address information, the control device specifies a first device address corresponding to the first logical address, reads read data stored in an area indicated by the first device address, and transmits the read data to the host computer.
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