Dell EMC Server Administrator Storage Management 9.1

Read Policy

Does my controller support this feature? See Supported Features.

The read policies indicate whether the controller should read sequential sectors of the virtual disk when seeking data.

  • Read Ahead — The controller reads sequential sectors of the virtual disk when seeking data. Read ahead policy may improve system performance if the data is written to the sequential sectors of the virtual disk.
  • No Read Ahead — Selecting no read ahead policy indicates that the controller should not use read ahead policy.
  • Read Cache Enabled — The controller reads the cache information to verify if the requested data is available in the cache before retrieving the data from the disk. Reading the cache information first can provide faster read performance because the data (if available in the cache) can be retrieved more quickly from the cache than from the disk.
  • Read Cache Disabled — The controller retrieves data directly from the disk and not from the cache.