Transfer between storage devices

摘要

Migrating data from a source storage device to a target storage device includes creating new paths to the target storage device, setting the target storage device to a state where I/O operations are initially accepted, where accepted I/O operations are rejected some time after acceptance, setting the source storage device to a state where at least some I/O operations are rejected, transferring metadata corresponding to the source storage device to the target storage device, where state information is transferred from the source storage device to the target storage device and setting the target storage device to a state where I/O operations are accepted and performed. Migrating data from a source storage device to a target storage device may also include creating new volumes on the target storage device and transferring data from the source storage device to the target storage device.

主权项

1. A method of migrating data from a source storage device to a target storage device, comprising:
creating new paths to the target storage device; setting the target storage device to a stalled-active state, wherein, in the stalled-active state, I/O operations are initially accepted and queued for a period of time, and wherein, after the period of time, the I/O operations are rejected and a check condition status sent; setting the source storage device to a passive state where at least some I/O operations are rejected; transferring metadata corresponding to the source storage device to the target storage device, wherein state information is transferred from the source storage device to the target storage device; and setting the target storage device to an active state where I/O operations are accepted and performed.