Dell PowerVault MD3000i User's Guide - Page 53

Standby Hot Spare Drive, In-use Hot Spare Drive

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6 Disk Groups and Virtual Disks Following is a list of terms used throughout this chapter: • Disk Group - A set of physical disks that are logically grouped and assigned a RAID level. Every disk group provides the overall capacity required to create one or more virtual disks. • Virtual Disk - A logical component created to enable hosts to access storage on the storage array. A virtual disk is created from the capacity available on a disk group and appears as one logical component even though it is created from more than one physical disk. • Storage Partitioning - Logical division of a storage array into entities consisting of one or more virtual disks that can be accessed by a single host or shared among hosts that are part of a host group. • Unconfigured Capacity - Physical disks that are not already assigned to a disk group. • Free Capacity - Space in a disk group that has not been assigned to a virtual disk. • Standby Hot Spare Drive - Physical disk that has been assigned as a hot spare drive and is available to take over for any failed physical disk. • In-use Hot Spare Drive - Physical disk that has been assigned as a hot spare drive and is currently taking over for a failed physical disk. • Snapshot Virtual Disk - Point-in-time image of a virtual disk in a storage array. • Snapshot Repository Virtual Disk - Virtual disk containing metadata and copy-on-write data for a particular snapshot virtual disk; automatically created when the snapshot virtual disk is created. • Consistency Check - Background operation that checks the parity of virtual disks. Disk Groups and Virtual Disks 53

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Disk Groups and Virtual Disks
53
6
Disk Groups and Virtual Disks
Following is a list of terms used throughout this chapter:
•
Disk Group — A set of physical disks that are logically grouped and
assigned a RAID level. Every disk group provides the overall capacity
required to create one or more virtual disks.
•
Virtual Disk — A logical component created to enable hosts to access
storage on the storage array. A virtual disk is created from the capacity
available on a disk group and appears as one logical component even
though it is created from more than one physical disk.
•
Storage Partitioning —
Logical division of a storage array into entities
consisting of one or more virtual disks that can be accessed by a single host
or shared among hosts that are part of a host group.
•
Unconfigured Capacity —
Physical disks that are not already assigned to
a disk group.
•
Free Capacity —
Space in a disk group that has not been assigned to a
virtual disk.
•
Standby Hot Spare Drive —
Physical disk that has been assigned as a hot
spare drive and is available to take over for any failed physical disk.
•
In-use Hot Spare Drive —
Physical disk that has been assigned as a hot
spare drive and is currently taking over for a failed physical disk.
•
Snapshot Virtual Disk —
Point-in-time image of a virtual disk in a
storage array.
•
Snapshot Repository Virtual Disk — Virtual disk containing metadata and
copy-on-write data for a particular snapshot virtual disk; automatically
created when the snapshot virtual disk is created.
•
Consistency Check — Background operation that checks the parity of
virtual disks.