Power failures that are causing write holes on your RAID system are rare. Besides that, you can easily prevent the power failure if you enable the continuous power supply and this is how you will avoid recover RAID data. Devices that are used in order to provide uninterruptable power supply are cheap and investing in them is not a big deal, but the result is really visible. Imagine that you lose power while working on RAID system. It can happen that you do not manage to recover data later. It can also happen that you do not manage to lift the RAID system up.
So when you have a device that protects you and your RAID system from power failure, you can be peaceful because you know your documents stored on RAID system are safe. The device works in a way to either stop the processes when the power fails and saves them, or it can continue with performances and operations that are working at the moment when the power fails. Since the device is not expensive, a user who works on RAID system should consider purchasing it. Surely, it is better to have a device than later ask for help to recover RAID data.
Things To Avoid To Prevent RAID 5 Problems
The RAID technology that is used in order to gain quick access to data and which can obtain more capacity is very safe technology. But sometimes some disturbances may occur such as RAID 5 write hole. Follow these instructions in order to prevent the data loss from RAID system: clean disks before you want to use it and do the back up on time. Change the damaged disks immediately after you notice the damage and do not change them with some old ones, but new and correct disks. Pay attention to the sounds the disks are producing. If they are strange like clicking or creaking, that is a sign for you to call the repairman to check on your RAID system.
When you are doing the hardware exchange or installing some software, do the back up of your data stored on a system. If the disk is broken, it is best to change it instead of using tools for fixing the disk in RAID. Also, it the disk is broken, it should not be defragmented. The defragmentation is useful on correct disks only. There is also one useful tip for you: mark disks in a RAID system according to their correct order in a system.