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How Data ONTAP reports drive types

Data ONTAP associates a type with every drive. Data ONTAP reports some drive types differently than the industry standards; you should understand how Data ONTAP drive types map to industry standards to avoid confusion.

When Data ONTAP documentation refers to a drive type, it is the type used by Data ONTAP unless otherwise specified. RAID drive types denote the role a specific drive plays for RAID. RAID drive types are not related to Data ONTAP drive types.

For a specific configuration, the drive types supported depend on the storage system model, the shelf type, and the I/O modules installed in the system. For more information about the types of drives supported by your configuration, see the Hardware Universe at hwu.netapp.com.

The following tables show how Data ONTAP drive types map to industry standard drive types for the SAS and FC-AL storage connection architectures, storage arrays, and for virtual storage (Data ONTAP-v):

Table 1. SAS storage connection architecture
Data ONTAP drive type Primary drive characteristic Industry standard drive type Description
BSAS Capacity SATA Bridged SAS–SATA disks with added hardware to enable them to be plugged into a SAS shelf.
FSAS Capacity NL-SAS Near Line SAS
MSATA Capacity SATA SATA disk in multi-disk carrier disk shelf
SAS Performance SAS  
SATA Capacity SATA Available only as internal disks for FAS20xx systems.
SSD High-performance SSD Solid-state drives
Table 2. FC-AL storage connection architecture
Data ONTAP drive type Primary drive characteristic Industry standard drive type Description
ATA Capacity SATA  
FCAL Performance FC  
Table 3. Storage arrays
Data ONTAP drive type Primary drive characteristic Industry standard drive type Description
LUN N/A LUN A logical storage device backed by storage arrays and used by Data ONTAP as a drive. These LUNs are referred to as array LUNs to distinguish them from the LUNs that Data ONTAP serves to clients.
Table 4. Virtual storage (Data ONTAP-v)
Data ONTAP drive type Primary drive characteristic Industry standard drive type Description
SAS N/A VMDK Virtual drives that are formatted and managed by VMware ESX.

For information about best practices for working with different types of drives, see Technical Report 3437: Storage Subsystem Resiliency Guide.