Recovering and restoring the system, Solutions to try before reinstalling, Hard-drive failures – Dell PowerVault 715N (Rackmount NAS Appliance) User Manual
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Recovering and Restoring the System
Dell™ PowerVault™ 715N NAS Systems Administrator's Guide
Solutions to Try Before Reinstalling
Recovering From an Operating System Failure
Restoring System-State Data After Reinstallation
Restoring Initial System Setup
This section provides instructions on how to recover the NAS system if the operating system or a hard drive fails.
Additionally, this section provides information for possible solutions that do not require restoring the operating system or
hard drives.
Because your NAS system is designed to have redundancy, it can recover from certain hardware and software failures. In
some situations, it can recover automatically, and in others, you must have administrator privileges and manually
intervene to recover the NAS system.
Use the following methods in the order listed to restore your NAS system:
1. Check all of the items in "
Solutions to Try Before Reinstalling
2. Swap the operating system hard drives as described in "
Booting From the Recovery Operating System Mirror Hard
."
3. Reinstall the operating system as described in "
Recovering From an Operating System Failure
."
Solutions to Try Before Reinstalling
This section provides checks and solutions that you should try before you reinstall your operating system or replace a hard
drive. Some of the checks require you to observe the LEDs on the front and back of the NAS system. For more
information about the LEDs, see your Installation and Troubleshooting Guide.
Does the power LED show that the NAS system is turned on? If not, is the power cable connected to the NAS
system and a power source?
Are the link LEDs on the NAS system and any network switches to which it may be connected illuminated?
Are you are using a standard Ethernet cable to connect to the network? Do not use the cable labeled "Ethernet
Crossover Cable" that was shipped with your system.
Have you allowed enough time for the NAS system to boot? The NAS system typically takes at least 5 minutes to
boot.
Does the NAS system boot completely? Use console redirection to connect to the NAS system and observe the boot
process. See "
" in "Troubleshooting."
Can you connect using a serial connection? See the serial connection procedures in "
" in "Initial Setup." If you can connect, then there may be a problem with your network.
Are the LEDs for all four hard drives on the NAS system lit? If they are not all lit, you have a failed hard drive. See
"
Hard-Drive Failures
Your NAS system has a mirror of the operating system on hard drives, which allows you to recover in most cases.
Depending on which drive fails, use one of the procedures in
to recover from a hard-drive failure.