[chiaz]

When enabled, the hard disk drive operates in write-back cache mode, in which all the data that gets written to the drive is first stored in the cache, and then later written to the disk. Both writes and reads are cached in this case. When disabled, the HDD operates in write-through cache mode, in which all data that gets written to the drive is immediately written to the disks and also stored in the cache. Writes are not cached, but reads are.

Note: This setting is recommended only for disks with a backup power supply, it further improves disk performance, but it also increases the risk of data loss if the disk loses power.

Open Device Manager, expand Disk drives, right-click on a Disk drive, click Properties, click the Policies tab, select the Enable advanced performance check box, and then click OK.