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A disk group is a combination of two or more physical drives that are presented to the operating system as a single device. Drives are combined into different configurations known as ‘RAID levels’. RAID stands for redundant array of independent disks. A RAID level categorizes how data is written to the drives in the array.
The RAID level you choose depends on which storage attributes are most important to you:
|The total amount of data you can store.
|The speed at which data is copied
|The number of disks that can fail before data is lost
Lyve Mobile Array can be configured as RAID 0 or RAID 5. Both RAID levels offer advantages and disadvantages, described below.
In RAID 0, data is split into blocks that get written across all drives in the array.
In RAID 5, data is also split into blocks that get written across all hard drives in the array. In addition, a redundant parity block is written for each data block.
RAID 5’s strong advantage over RAID 0 is data protection. If one physical drive fails, you still have access to all your data.
(The size of the drive with the smallest capacity in the array) * (Total hard drives minus 1)
Example: An array is assigned six 10TB hard drives for a total of 60TB. The equation is:
10TB * 5 = 50TB
The volume is displayed on the Device Details page with an amber status icon while the disks are being initialized.