Dell PowerVault DX6112 Dell DX Object Storage Platform User's Guide - Page 32

Two Disk Failure, Detecting And Monitoring Disk Failures, Storage Node Hard Drive LED Behavior

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Two Disk Failure If two physical disks fail, the RAID 5 group must be reconfigured and the operating system must be reinstalled. Detecting And Monitoring Disk Failures To optimize the protection of the RAID group on the system, you must detect hard drive failures immediately. Replacing failed disks immediately reduces the risk of unplanned downtime and loss of critical data. Ensure that you replace the failed disk with a new disk of the same capacity. If you use drives of greater capacity, some usable disk space is lost in the RAID 5 configuration. You can use the following methods to monitor the health of the disks: • Hard drive LED indicators - Monitors the drive activity and reports failures. For more information, see the system's Owner's Manual at dell.com/support/manuals. • Dell OpenManage Server Administrator - Monitors the health of the disks. • Dell Management Console - Centrally monitors the status of Dell systems. For more information about installing and using DMC, see the Dell Management Console User's Guide at dell.com/support/manuals. Storage Node Hard Drive LED Behavior The following table displays the hard drive LED behavior for the DX6004S and DX6012S generation of DX Storage Nodes, and the DX6104-SN and DX6112-SN generation. Table 2. Hard Drive LED Behavior on DX6004S, DX6012S, DX6104-SN, and DX6112-SN Systems System State DX6004S and DX6012S DX6104-SN and DX6112-SN Power-on Off Off BIOS initialization Off On PXE boot Off On CAStor loaded and running Off On Drive identify operation Blink Blink Post-Drive identify operation Off Off (identify light turned off) Hot Swap/Bus Reset Off On Reinstalling The Operating System The operating system is preinstalled on the DX Cluster Services Node. After a multiple disk failure of the system's RAID group: 1. Reinstall the operating system. 2. Replace the failed hard drives. 3. Run the RM Utility. 32

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Two Disk Failure
If two physical disks fail, the RAID 5 group must be reconfigured and the operating system must be reinstalled.
Detecting And Monitoring Disk Failures
To optimize the protection of the RAID group on the system, you must detect hard drive failures immediately. Replacing
failed disks immediately reduces the risk of unplanned downtime and loss of critical data. Ensure that you replace the
failed disk with a new disk of the same capacity. If you use drives of greater capacity, some usable disk space is lost in
the RAID 5 configuration.
You can use the following methods to monitor the health of the disks:
•
Hard drive LED indicators — Monitors the drive activity and reports failures. For more information, see the
system’s
Owner's Manual
at
dell.com/support/manuals
.
•
Dell OpenManage Server Administrator — Monitors the health of the disks.
•
Dell Management Console — Centrally monitors the status of Dell systems. For more information about installing
and using DMC, see the
Dell Management Console User's Guide
at
dell.com/support/manuals
.
Storage Node Hard Drive LED Behavior
The following table displays the hard drive LED behavior for the DX6004S and DX6012S generation of DX Storage Nodes,
and the DX6104-SN and DX6112-SN generation.
Table 2. Hard Drive LED Behavior on DX6004S, DX6012S, DX6104-SN, and DX6112-SN Systems
System State
DX6004S and DX6012S
DX6104-SN and DX6112-SN
Power-on
Off
Off
BIOS initialization
Off
On
PXE boot
Off
On
CAStor loaded and running
Off
On
Drive identify operation
Blink
Blink
Post-Drive identify operation
(identify light turned off)
Off
Off
Hot Swap/Bus Reset
Off
On
Reinstalling The Operating System
The operating system is preinstalled on the DX Cluster Services Node. After a multiple disk failure of the system’s RAID
group:
1.
Reinstall the operating system.
2.
Replace the failed hard drives.
3.
Run the RM Utility.
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