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Managing disks

You can perform various tasks to manage your disks, including removing a failed disk, removing data from a disk, and removing ownership of a disk. There are also tasks you can perform related to managing disks using root-data partitioning and related to self-encrypting disks.

Attention
The encrypted build of ONTAP is required to take advantage of LAE or LVE or using a key management system with Lenovo Storage Encryption (LSE)/ Self-Encryption Disks (SED). Non-encrypted ONTAP does not support encryption function. Therefore, Self-Encrypting Disks (SED) will behave as "non" Self-Encrypting Disks (non-SED) when being used with non-encrypted ONTAP.
  • How hot spare disks work
    A hot spare disk is a disk that is assigned to a storage system and is ready for use, but is not in use by a RAID group and does not hold any data.
  • How low spare warnings can help you manage your spare disks
    By default, warnings are issued to the console and logs if you have fewer than one hot spare drive that matches the attributes of each drive in your storage system. You can change the threshold value for these warning messages to ensure that your system adheres to best practices.
  • Displaying disk and partition ownership
    You can view disk ownership to determine which node controls the storage. You can also view the partition ownership on systems that use shared disks.
  • Manually assigning ownership of partitioned disks
    You can set the ownership of the container disk or the partitions manually or by using auto-assignment—just as you do for unpartitioned disks.
  • Additional root-data partitioning management options
    Beginning with ONTAP 9.4, a new root-data partitioning option is available from the Boot Menu that provides additional management features for disks that are configured for root-data partitioning.
  • Configuring automatic assignment of disk ownership
    You can configure ONTAP to automatically assign disk ownership according to a disk's stack, shelf, or bay. If configured, automatic disk ownership assignments occur 10 minutes after system initialization and every five minutes during normal system operation.
  • Removing a failed disk
    A disk that is completely failed is no longer counted by ONTAP as a usable disk, and you can immediately disconnect the disk from the disk shelf. However, you should leave a partially failed disk connected long enough for the Rapid RAID Recovery process to complete.
  • Removing ownership from a disk
    ONTAP writes disk ownership information to the disk. Before you remove a spare disk or its shelf from a node, you should remove its ownership information so that it can be properly integrated into another node.
  • Sanitizing a disk
    Disk sanitization enables you to remove data from a disk or set of disks so that the data can never be recovered.
  • Sanitizing a disk in maintenance mode
    Beginning in ONTAP 9.6, you can perform disk sanitization in maintenance mode. This allows you to remove data from a disk or a set of disks on decommissioned or inoperable systems so that the data can never be recovered.
  • Setting up an active-passive configuration on nodes using root-data partitioning
    When an HA pair is configured to use root-data partitioning by the factory, ownership of the data partitions is split between both nodes in the pair, for use in an active-active configuration. If you want to use the HA pair in an active-passive configuration, you must update partition ownership before creating your data aggregate.
  • Setting up an active-passive configuration on nodes using root-data-data partitioning
    When an HA pair is configured to use root-data-data partitioning by the factory, ownership of the data partitions is split between both nodes in the pair, for use in an active-active configuration. If you want to use the HA pair in an active-passive configuration, you must update partition ownership before creating your data aggregate.
  • Commands for managing disks
    You can use the storage disk and storage aggregate commands to manage your disks.
  • Commands for displaying space usage information
    You use the storage aggregate and volume commands to see how space is being used in your aggregates and volumes and their Snapshot copies.
  • Commands for displaying information about storage shelves
    You use the storage shelf show command to display configuration and error information for your disk shelves.