Even though RAID indeed provides users data redundancy, it still cannot guarantee that it can keep far away from data loss. So users should make efforts to take some precautions to combat against RAID data losses. This article will expose 5 useful tips.
As mentioned in our previous article “5 Common Causes of RAID Data Loss”, you can get acquainted with the 5 most common culprits of RAID failures. They are RAID controller failure, physical damages of hard drives, circuit board corruption, improper rebuild of RAID volume and accidental deletion respectively. Based on these malicious factors, here we will come up with the corresponding measures. As long as you adhere to the 5 tips introduced below, you can reduce the chance of RAID data losses in a great degree.
1. Make a Consistent Data Backup
First of all, when it comes to preventing data loss, one of the vital necessities is a consistent and up-to-date data backup, no matter for common computer data or RAID data. For instance, in order that we can recover damaged PST data quickly in the event of Outlook crash, we should keep backing up our Outlook PST file on a regular basis. The same holds true for RAID data. To avoid RAID data losses, we ought to back up our RAID data on schedule as well.
2. Use an Appropriate RAID Configuration
It is known that data redundancies must vary with different RAID configurations. Therefore, so as to obtain the best and most effective redundancies to protect our data, we would be required to apply right RAID configurations. When choosing a RAID level, you need to take all aspects of factors into consideration, like the type, importance and amount of data, etc. If you can’t define your actual requirements, just call in professional assistance.
3. Monitor the Health of the Hard Drives in RAID
Since that hard drive is the indispensable component in a RAID system and it is prone to corruption, it’s vitally significant to pay close attention to the health of drive. As a rule, if you’re using a RAID 5 system and one of its drives breaks down, do not leave it aside, you should take immediate action to replace it, even though the system can keep running. It’s because that the remaining hard drives can go on strike soon owing to incapacity to withstand the stress of managing data. All in all, keep track of all the hard drives inside the array.
4. Make an Image for Hard Drives before DIY Rebuild
Confronted with failure of one hard drive, you may want to perform the rebuild by yourself. But before it, you’d better make an image for all the hard drives in that rebuild can fail readily. If with an image in hand, when rebuild fails and all the data in drives get lost, you still can attempt data recovery later. Additionally, the image will play a great role when you seek help from data recovery experts after rebuild failure.
5. Never Try to Rebuild if More than One Drive Fails
As mentioned above, the RAID system will rebuild the drive array when one drive fails. But provided that there are more than one hard drives which have failed, it’s inadvisable to rebuild it. For instance, if two hard drives fail on a RAID 5 system, it doesn’t make sense to replace the failed drive and rebuild the array. At worst, if you made some faults during the rebuilding procedure, the remaining proper drives may suffer further damages and permanent data loss.
Shirley Zhang is a data recovery expert in DataNumen, Inc., which is the world leader in data recovery technologies, including repair SQL mdf database corruption and outlook repair software products. For more information visit www.datanumen.com