Managing disks

You can add and remove disks, sanitize them, and display information about them. These tasks help you use your disks efficiently.

• Adding disks to a storage system
  You add disks to a storage system to increase the number of hot spares, to add space to an aggregate, or to replace disks.
• Removing disks from a storage system
  How you remove a disk from your storage system depends how the disk is being used. By using the correct procedure, you can prevent unwanted AutoSupport notifications from being generated and ensure that the disk will function correctly if it is reused in another storage system.
• Replacing disks that are currently being used in an aggregate
  You can use the disk replace command to replace disks that are part of an aggregate without disrupting data service. You do this to swap out mismatched disks from a RAID group. Keeping your RAID groups homogenous helps optimize storage system performance.
• Removing data from disks using disk sanitization
  Disk sanitization enables you to erase data from a disk or set of disks so that the data can never be recovered.
• Stopping disk sanitization
  You can use the disk sanitize abort command to stop an ongoing sanitization process on one or more specified disks. If you use the disk sanitize abort command, the specified disk or disks are returned to the spare pool.