Virtual Drive States; Beep Codes; Enclosure Management; Raid Levels - Lenovo ThinkServer RD330 Software User's Manual

MegaRAID SAS Software User Guide
2.4.17

Virtual Drive States

2.4.18

Beep Codes

2.4.19

Enclosure Management

2.5

RAID Levels

The virtual drive states are described in Table 5.
Table 5: Virtual Drive States
State
Optimal The virtual drive operating condition is good. All configured drives are
online.
Degraded The virtual drive operating condition is not optimal. One of the configured
drives has failed or is offline.
Partial Degraded The operating condition in a RAID 6 virtual drive is not optimal. One of the
configured drives has failed or is offline. RAID 6 can tolerate up to two drive
failures.
Failed The virtual drive has failed.
Offline The virtual drive is not available to the RAID controller.
An alarm sounds on the MegaRAID controller when a virtual drive changes from an
optimal state to another state, when a hot spare rebuilds, and for test purposes.
Table 6: Beep Codes, Events, and Virtual Drive States
Event
RAID 0 virtual drive loses 1 or more
virtual drives
RAID 1 loses a mirror drive
RAID 1 loses both drives
RAID 5 loses 1 drive
RAID 5 loses 2 or more drives
RAID 6 loses 1 drive
RAID 6 loses 2 drives
RAID 6 loses more than 2 drives
A hot spare completes the rebuild
process and is brought into a drive
group
Enclosure management is the intelligent monitoring of the disk subsystem by software
and/or hardware. The disk subsystem can be part of the host computer or can reside in
an external disk enclosure. Enclosure management helps you stay informed of events
in the disk subsystem, such as a drive or power supply failure. Enclosure management
increases the fault tolerance of the disk subsystem.
The RAID controller supports RAID levels 0, 00, 1, 5, 6, 10, 50, and 60. The supported
RAID levels are summarized in the following section.
In addition, it supports independent drives (configured as RAID 0 and RAID 00.) The
following sections describe the RAID levels in detail.
Chapter 2: Introduction to RAID
Description
Virtual Drive State
Offline 3 seconds on and 1 second off
Degraded 1 second on and 1 second off
Offline 3 seconds on and 1 second off
Degraded 1 second on and 1 second off
Offline 3 seconds on and 1 second off
Partially 1 second on and 1 second off
Degraded
Degraded 1 second on and 1 second off
Offline 3 seconds on and 1 second off
N/A 1 second on and 3 seconds off
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RAID Levels
Beep Code
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