Users Guide

Frequently Asked Questions
This section provides frequently asked questions that address situations commonly experienced in a storage environment.
• Why is a Rebuild not Working
• How To Avoid Removing The Wrong Disk
• How Can I Safely Remove or Replace a Physical Disk
• How do I Recover from Removing the Wrong Physical Disk
• How do I Identify the Firmware Version that is installed
• Which Controllers do I Have
• How do I Turn off an Alarm
• Which RAID Level is Best For me
Topics:
• Why Is A Rebuild Not Working?
• How To Avoid Removing The Wrong Disk
• How Can I Safely Remove Or Replace A Physical Disk
• How Do I Recover From Removing The Wrong Physical Disk
• How Do I Identify The Firmware Version That Is Installed
• Which Controllers Do I Have?
• How Do I Turn Off An Alarm
• Which RAID Level Is Best For Me?
Why Is A Rebuild Not Working?
For more information, see A Rebuild Does Not Work.
How To Avoid Removing The Wrong Disk
You can avoid removing the wrong disk by blinking the LED display on the disk that you want to remove. For information on blinking the
LED display:
• See Blinking And Unblinking A Physical Disk to blink the LED display on a physical disk.
• See Blinking And Unblinking A Virtual Disk to blink the LED display on all physical disks included in a particular virtual disk.
If you have already removed the wrong disk, see Recovering From Removing The Wrong Physical Disk.
How Can I Safely Remove Or Replace A Physical
Disk
The following sections provide information related to safely removing a healthy physical disk:
• For disks that reside in an enclosure, use the Preparing To Remove A PCIe SSD task to locate the disk within the enclosure and
deactivate it prior to removal.
• For physical disks included in a virtual disk, use the Offline task to deactivate the disk prior to removal. If you need help locating the
disk within the enclosure, you can blink LED on the disk.
Related concepts
Moving Physical And Virtual Disks From One System To Another
Recovering From Removing The Wrong Physical Disk
Protecting Your Virtual Disk With A Hot Spare
19
Frequently Asked Questions 159