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Disks

You can use Storage Manager to manage disks.

  • Reassigning disks to nodes
    You can use Storage Manager to reassign the ownership of spare disks from one node to another node to increase the capacity of an aggregate or storage pool.
  • 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.
  • Spare requirements for multi-disk carrier disks
    Maintaining the proper number of spares for disks in multi-disk carriers is critical for optimizing storage redundancy and minimizing the amount of time that ONTAP must spend copying disks to achieve an optimal disk layout.
  • Shelf configuration requirements for multi-disk carrier storage shelves
    You can combine multi-disk carrier disk shelves with single-disk carrier disk shelves (standard disk shelves) on the same storage system and within in the same stack.
  • How to determine when it is safe to remove a multi-disk carrier
    Removing a multi-disk carrier before it is safe to do so can result in one or more RAID groups becoming degraded, or possibly even a storage disruption. Storage Manager enables you to determine when it is safe to remove a multi-disk carrier.
  • 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.
  • Disks window
    You can use the Disks window to view all the disks in your storage system.
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