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Disks

You can use Storage Manager to manage disks.

  • Viewing disk information
    You can use the Disks window in Storage Manager to view the name, size, and container details of disks along with graphical information about capacity disks and cache disks.
  • How ONTAP reports disk types
    ONTAP associates a type with every disk. ONTAP reports some disk types differently than the industry standards; you should understand how ONTAP disk types map to industry standards to avoid confusion.
  • Minimum number of hot spares required for disks
    Having insufficient spares increases the risk of a disk failure with no available spare, resulting in a degraded RAID group. A spare disk is also required to provide important information (a core file) to technical support in case of a controller disruption.
  • Considerations for sizing RAID groups
    Configuring an optimum RAID group size requires a trade-off of factors. You must decide which factors—speed of RAID rebuild, assurance against risk of data loss due to drive failure, optimizing I/O performance, and maximizing data storage space—are most important for the aggregate that you are configuring.
  • About disks
    A disk is the basic unit of storage for storage systems that use ONTAP software to access native disk shelves.
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