PRIMECLUSTER Global Disk Services Configuration and Administration Guide 4.1 (Linux)

A.3.3 Guidelines for Concatenation

Pay attentions to the following guidelines when constructing concatenation configurations.

• The available size of the concatenation group (available capacity as volumes) equals the total of the available size of disks connected to the concatenation group.
• Where possible, concatenating disks with similar performance specifications is recommended.
  When concatenating disks with different performance specifications such as the revolution speed, the performance becomes unbalanced.
• Concatenation in combination with mirroring is recommended.
  When concatenating disks, the risk of losing data from a disk failure increases as more disks are involved compared to a usual disk configuration.
  By mirroring concatenation groups, large capacity and data redundancy can be achieved at the same time.