RAID

RAID stands for Redundant Arrays of Independent Drives. It refers to the combination of multiple disks through a disk array card to enhance disk IO capabilities or provide redundancy. Bare Metal Cloud Servers from UCloud Global offer five different RAID options: RAID 1, 0, 10, 5, and NoRaid, which can be selected during the creation/reinstallation of a Bare Metal Cloud Server.

RAID 1

RAID 1 ensures data security through data mirroring, offering read and write performance equivalent to a single disk. Data is backed up via mirroring, with a storage space utilization rate of 50%. It is suitable for scenarios requiring high data security.

RAID 0

Risk Warning: RAID 0 lacks redundancy and data recovery capability, providing no data security assurance. If a single disk fails, the entire RAID set becomes unavailable.

RAID 0 uses data striping for distribution, offering the highest read and write performance with a disk utilization rate of 100%. However, it lacks redundancy assurance and should not be used in scenarios demanding high data security.

RAID 5

RAID 5 provides parity redundancy for data and uses data striping for distribution, achieving high read and write performance with a storage space utilization rate of over 50%. Its security level is slightly lower than RAID 10 and RAID 1. It is suitable for scenarios with more reads and fewer writes and is the best compromise among performance, data redundancy, and cost.

RAID 10

RAID 10 combines RAID 0’s data striping and RAID 1’s mirroring redundancy, offering both high read and write speeds and mirrored data protection, with a storage space utilization rate of 50%. It is commonly used in practical applications.

NoRAID

Risk Warning: NoRAID lacks redundancy and data recovery capability, providing no data security assurance.

No RAID configuration is created. The system can see N disks with dedicated IO. If a single disk fails, the other disks remain available.

Some models do not have a disk array card and can only select NoRaid.