Dell PowerVault 132T LTO Performance Considerations for Tape Drives and Librar - Page 9

being the number of hard drives in the array instead of a single channel for a single, drives - 2 drive

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RAID 0 Commonly known as striping, RAID 0 allows two or more disks to be joined to create one virtual drive in the fashion of a single LUN. It is referred to as striping because data is written across all of the disks in the array, not just to one disk at a time. Thus, the throughput is spread across n channels (n being the number of hard drives in the array) instead of a single channel for a single hard disk. This results in excellent read/write performance, but no fault tolerance. Figure 1-2 shows four hard drives in a RAID 0 configuration. Data is striped across all four hard drives, resulting in four channels for reading and writing to the array. Figure 1-2. Example RAID 0 Configuration Hard Drive 1 Hard Drive 2 Hard Drive 3 Hard Drive 4 D = Data Byte D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 D16 D17 D18 D19 D20 SCSI or RAID Controller Tape Drive Performance Considerations for Tape Drives and Libraries 9

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Performance Considerations for Tape Drives and Libraries
9
RAID 0
Commonly known as striping, RAID 0 allows two or more disks to be joined to create one virtual
drive in the fashion of a single LUN. It is referred to as striping because data is written across all of
the disks in the array, not just to one disk at a time. Thus, the throughput is spread across
n
channels (
n
being the number of hard drives in the array) instead of a single channel for a single
hard disk. This results in excellent read/write performance, but no fault tolerance.
Figure 1-2 shows four hard drives in a RAID 0 configuration. Data is striped across all four hard
drives, resulting in four channels for reading and writing to the array.
Figure 1-2.
Example RAID 0 Configuration
SCSI or RAID
Controller
Tape Drive
D1
D5
D9
D13
D17
D2
D6
D10
D14
D18
D3
D7
D11
D15
D19
D4
D8
D12
D16
D20
Hard Drive 1
Hard Drive 2
Hard Drive 3
Hard Drive 4
D = Data Byte