| 摘要 |
A method and a storage system for implementing a sustained large block random write performance mechanism for shingled magnetic recording (SMR) drives 102 in a redundant array of inexpensive disks (RAID) 108. A Solid state drive 106 (SSD) is provided with the SMR drives in the RAID. The SSD is used in a hot spare mode, which is activated when a large block random-write event is identified for a SMR drive in the RAID. In the hot spare mode, the SSD temporarily receives new incoming writes for the identified SMR drive. Then the identified SMR drive is updated from the SSD to restore the state of the identified SMR drive, and operations continue with normal writing only using the SMR drives in the RAID. The large block random write might be an exception region (E-region) destage cycle or a defragmentation of an SMR drive in the RAID. |
