3Ware 9550SXU16MLB10 User Guide - Page 104
Changing An Existing Configuration, RAID Level Migration (RLM) Overview
UPC - 693494971613
View all 3Ware 9550SXU16MLB10 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 104 highlights
Configuring Units Changing An Existing Configuration With 3ware 9000 series RAID controllers you can convert one RAID configuration into another while the unit is online. This process is known as RAID Level Migration (RLM). Note: Units on a 7xxx/8xxx series controller cannot be migrated. You can use RAID Level Migration to make two main types of configuration changes: RAID Level Unit Capacity Expansion You can also use RLM to change the stripe size of a unit. These changes can be made using 3DM2 or the CLI. Instructions for using migrate in 3DM2 are described below. For information about CLI, see 3ware 9000 Series Serial ATA RAID Controller CLI Guide. This section includes the following topics about changing existing configurations: RAID Level Migration (RLM) Overview Changing RAID Level Expanding Unit Capacity Informing the Operating System of Changed Configuration RAID Level Migration (RLM) Overview RAID level migration is the process of converting one RAID configuration to another. When you migrate a unit to a different configuration, the user data on it is redistributed to the format of the new configuration. This data redistribution process is a background task, similar to the rebuild or verify processes. Figure 40 shows an example of how data is reconfigured during a migration. In this example, the migration is from a 4-drive RAID 0 to a 6-drive RAID 5, with both having the same stripe size. As can be seen, every piece of user data is moved from its original physical location. 98 3ware 9000 Series Serial ATA RAID Controller User Guide