Synchronous input/output command
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United States of America Patent
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-
Oct 23, 2018
Grant Date -
Apr 6, 2017
app pub date -
Jun 14, 2016
filing date -
Oct 1, 2015
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Aspects include sending a request to perform a unit of work that includes a synchronous I/O operation. The sending is from an operating system (OS) executing on a server to firmware located on the server. The synchronous I/O request includes a command request block that includes an operation code identifying the synchronous I/O operation and a identifier of a persistent storage control unit (SCU). The OS waits for the synchronous I/O to complete and the unit of work remains active during the waiting. The firmware detects that the synchronous I/O operation has completed. A command response block that includes completion status information about the synchronous I/O operation is received by the OS from the firmware. The unit of work is completed in response to the I/O operation completing.
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