3Ware 9550SXU-16ML User Guide - Page 110

Chapter 6. 3ware Disk Manager (3DM 2) In addition, if there is a unit with the status Inoperable before a rescan (for example, a RAID 5 unit missing 2 or more drives), and a rescan finds drives that complete the unit, the inoperable unit will become a valid unit. Note: In 8000-series controllers, only JBOD units can be removed and rescanned while keeping the data intact. Clicking Rescan Controller after removing units other than a JBOD unit (e.g. RAID 5) will cause the drives that make up the unit to be seen as individual available drives; they will not be pieced together to form a unit. This is unlike the 9000 series controllers, which will piece together the unit for you and display the drives as a unit. If you still want to use the drives together as a unit, restart the computer before creating a new unit with those drives. Creating a new unit with those drives will destroy any existing data on them. After you restart, the 8000 will again see the drives as a valid unit. Unit Maintenance The Unit Maintenance section of the page lists all existing units on the current controller, and displays summary information about them. The top row shows information about the unit, while subsequent rows show summary information about each drive in the unit. Unit Information Unit Number. The unit number assigned to the unit by the firmware. Unit numbers for 9000 series are in sequential order. Unit numbers for the 7/8000 series will begin with the lowest port number of the unit. Use the checkbox next to the unit to select a unit before clicking one of the task buttons. # Drives. Number of drives in the unit. Type of Unit. Type of unit: RAID 0, RAID 1, RAID 5, RAID 10, RAID 50, Single Disk, Spare, or JBOD. If the unit has been given a unique name, it shows beneath the RAID type. Name of Unit. User-assigned unique name of the unit. The default setting is blank. Capacity. The usable capacity (size) of the unit. Status. Operational status of the unit: Ok, Rebuilding, Initializing, Verifying, Migrating, Degraded, or Inoperable (missing drives). When Rebuilding, Initializing, Migrating, or Verifying, the percentage (%) complete is also shown. The percentage complete can be active or paused. To see whether this task is currently active or paused, click on the unit number to display the Unit Information page, which has that information. 100 3ware 9550SX Serial ATA RAID Controller User Guide