Product manual

Galaxy G3G12 / G3G16 Installation and Hardware Reference Manual
135 Section 4 Maintenance with GAM
4.24 Managing Logical Drives
Logical drives are made from disk arrays. In the Tree, you can see a graphic representation of the logical
drives that belong to each array. You can see a summary of all logical drives in the subsystem under Logical
Drive Summary.
Logical drive management includes the following functions:
• Viewing Information for All Logical Drives
• Viewing Logical Drive Information
• Viewing Logical Drive Statistics
• Making Logical Drive Settings
• Initializing a Logical Drive
• Running Redundancy Check
• Viewing the Logical Drive Check Table
• Making Logical Drive LUN Settings
Viewing Information for All Logical Drives
To view information about all logical drives in a disk array:
1. Click the Subsystem
icon in Tree View.
2. Click the Disk Arrays
icon.
3. Click the Disk Array icon.
4. Click the Logical Drives
icon
Logical Drive Status
• OK – This is the normal state of a logical drive. When a logical drive is Functional, it is ready for
immediate use. For RAID Levels other than RAID 0 (Striping), the logical drive has full redundancy.
• Synchronizing – This condition is temporary. Synchronizing is a maintenance function that verifies the
integrity of data and redundancy in the logical drive. When a logical drive is Synchronizing, it will
function and your data is available. However, access will be slower due to the synchronizing operation.
• Rebuilding – This condition is temporary. When a physical drive has been replaced, the logical drive
automatically begins rebuilding in order to restore redundancy (fault tolerance). When a logical drive is
rebuilding, it will function and your data is available. However, access will be slower due to the
rebuilding operation.
• Critical – This condition arises as the result of a physical drive failure. A degraded logical drive will still
function and your data is still available. However, the logical drive has lost redundancy (fault tolerance).
You must determine the cause of the problem and correct it.
• Offline – This condition arises as the result of a second physical drive failure. An Offline logical drive is
not accessible but some or all of your data may remain intact. You must determine the cause of the
problem and correct it.
• Transport Ready – After you perform a successful Prepare for Transport operation, this condition
means you can remove the physical drives of this disk array and move them to another enclosure or
different drive slots. After you relocate the physical drives, the disk array status will show OK.
To create a logical drive, see
Creating a L.
To delete a logical drive, see
Deleting a L.
For a Degraded or Offline logical drive, see “Critical & Offline Disk Arrays” in chapter 7.
Viewing Logical Drive Information
To view information for a single logical drive:
1. Click the Subsystem
icon in Tree View.