Drives and disks

View the information that is shown about disk drives or disks in block storage systems.

The following information is shown for each drive or disk:

Acknowledged

Shows whether a user marked the status of a disk or drive as acknowledged. An acknowledged status indicates that the status was reviewed and is either resolved or can be ignored. An acknowledged status is not used when the status of related, higher-level resources is determined.

For example, if the status of a disk or drive is Error, then the status of the related storage system is also Error. If the Error status of the disk or drive is acknowledged, then its status is not used to determine the overall status of the storage system. In this case, if the other internal resources of the storage system are Normal, then the status of the storage system is also Normal.

Aggregate

The aggregate that contains the disk. An aggregate is a collection of RAID groups that consist of physical disks.

Availability: NetApp storage systems.

Array Site

The array site to which this disk belongs. Usually, each array site has four or eight disks. Applies to DS8000 disks only.

Capacity (GiB)

For uncompressed disks or drives, the capacity is the same as the physical capacity and represents the total amount of unformatted storage space.

For compressed disks or drives, the capacity is the estimated amount of data that can be written to the disk or drive. This value is larger than the physical capacity because drive compression is used to reduce the size of the data.

Capacity (GB)

The decimal equivalent of the Capacity (GiB) metric.

Class

The technology type of the disk or drive, such as Solid-State Drive, NVMe SSD, Storage Class Memory, Flash, Fibre Channel (FC), SATA, and other types.

Compressed

Shows whether the disk or drive uses inline data compression to automatically compress the data that is written.

Enclosure

For IBM FlashSystem A9000 and IBM FlashSystem A9000R: The number of the flash enclosure in which a drive is installed.
For IBM Storage FlashSystem 9100 and IBM Storage FlashSystem 900: The enclosure where the drive resides. A drive can be associated with a single enclosure only.
For SAN Volume Controller, the IBM Storwize family, and IBM Storage FlashSystem V9000: The enclosure or node where the disk resides. A disk can be associated with a single enclosure or node only.

Location

A code that represents the physical location of a disk within the hardware of a storage system. Applies to DS6000 and DS8000 disks only.

Name

The internal identifier of a disk or drive. For DS8000 storage systems, this name uniquely identifies a disk within a single array site.

Physical Capacity (GiB)

The total amount of unformatted storage space on the disk or drive. For disks or drives that use inline data compression, the physical capacity is smaller than the capacity of the disk or drive because compression is used to reduce the size of the data.

Available for: Storage systems with disks or drives that use inline data compression, such as IBM Storage FlashSystem 9100 and Storwize V7000 Gen3.

Rank

The rank to which a disk belongs. This rank is associated with the array site of the disk. If no rank is defined, the value None is shown. Applies to DS8000 disks only.

Slot

The slot number of the disk or drive within the associated enclosure or node.

Spare

Shows whether a disk or drive is a spare disk or drive. A spare disk or drive is not allocated for storage and is predesignated for use as a replacement for a failed disk or drive.

Speed (RPM)

The number of revolutions per minute of a disk.

Status

The status of a disk or drive. Use the status to determine the condition of the disk or drive, and if any actions must be taken. For example, if a disk has an Error status, take immediate action to correct the problem. If the disk has an Operational status, then it is operating normally and no further action is required.