Quantum DX5000 User's Guide download pdf (Page 28)

Chapter 1 DX3000 and DX5000 System Description

Supported RAID Configurations

Quantum DX3000 and DX5000 User’s Guide 10

RAID Sets 1 The DX3000/DX5000 system is divided into RAID sets. The number of

RAID sets differs depending on the system:

• DX3000 can contain two RAID sets:

• The first RAID set is made up of either the first four drive sleds

(drive sleds 1-4) in a four drive system or eight drive sleds (drive

sleds 1-8) in an eight drive system.

• If the original system was upgraded from four to eight drives, the

second RAID set is made up of the last four drive sleds (drive

sleds 5-8).

• DX5000 can contain four RAID sets:

• The first RAID set is made up of the first six drive sleds (drive

sleds 1-6).

• The second RAID set is made up of the next six drive sleds (drive

sleds 7-11 with drive 12 as a hot spare).

• The third RAID set is made up of the next six drive sleds (drive

sleds 13-18 if installed).

• The fourth RAID set is made up of the next six drive sleds (drive

sleds 19-23 with drive 24 as a hot spare).

Each RAID set can sustain a single hard drive failure and can hold a

maximum of 160 virtual tape cartridges (80 cartridges per LUN).

Supported RAID Configurations 1

RAID is short for Redundant Array of Independent (or Inexpensive)

Disks, which is a category of hard disk drives that employ two or more

drives in combination for fault tolerance and performance. There are a

number of RAID levels in use today such as 0, 1, 3, 5, and 10.

The DX3000 and DX5000 systems support RAID 5 with hot spare

configurations (Only DX5000 systems can be configured with a hot

spare).

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Quantum DX5000 User's Guide Page 28