User manual
Table Of Contents
- RAIDXpert User Manual
- Contents
- Chapter 1: Introduction
- Chapter 2: Installation
- Chapter 3: Setup
- Chapter 4: RAIDXpert User Interface
- Chapter 5: Monitoring and Managing
- Logging into RAIDXpert
- Choosing a Language
- Logging out of RAIDXpert
- User Management
- Host Management
- Utility Configuration
- Controller
- Physical Drives
- Logical Drives
- Viewing Logical Drives
- Creating a Logical Drive
- Deleting a Logical Drive
- Viewing Logical Drive Information
- Making Logical Drive Settings
- Backing up a RAID Ready Logical Drive
- Migrating a Logical Drive
- Rebuilding a Logical Drive
- Synchronizing All Logical Drives
- Synchronizing One Logical Drive
- Initializing a Logical Drive
- Logical Drive Activation
- Managing a Critical or Offline Logical Drive
- Spare Drives
- Chapter 6: Technology Background
- Appendix A: Frequently Asked Questions
- Appendix B: Partition and Format
RAIDXpert User Manual
84
In a few moments, the logical drive status goes from Offline to Critical.
Critical status allows you to access your data and rebuild the logical drive.
See “Rebuilding a Logical Drive” on page 74.
Managing a Critical or Offline Logical Drive
A fault-tolerant logical drive—RAID 1, 5, or 10—goes Critical when a physical
drive is removed or fails. Due to the fault tolerance of the logical drive, the data is
still available and online. However, once the logical drive goes critical, it has lost
its fault tolerance and performance may be adversely affected.
If the fault was caused by a failed physical drive that was removed, the drive
must be replaced by another drive, either identical or larger, in order for the RAID
system to rebuild and restore optimal configuration.
A non-fault tolerant logical drive—RAID 0 or JBOD—goes Offline when a
physical drive is removed or fails. A RAID Ready logical drive, which has only