NetApp
Cluster-Mode System Manager Help : Cluster-Mode : Cluster > Storage > Aggregates : Understanding aggregates : What a matching spare is
What a matching spare is
A matching hot spare exactly matches a data disk for several characteristics.
A matching spare is a disk that exactly matches a data disk for all of the following criteria:
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Type (FC, SAS, ATA, BSAS, SSD, or SATA)
Note: On systems with the raid.disktype.enable option set to off, FC and SAS disks are considered to be the same type and SATA, ATA, and BSAS disks are considered to be the same type.
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Size
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Speed (RPM)
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Checksum type (BCS or ZCS)