RAID Servers, Arrays, and Problems They Face:
RAID setups are designed to cope with a lot of heavy traffic in the workplace. And even smaller devices that can be used by families at home for the storing of multimedia and other files can be overworked. With this in mind RAID servers should, where possible, be allowed some downtime if possible. One of the most commonly reported problems with RAID servers to us here at Newcastle Data Recovery are those relating to hard drives that stop working whilst in the midst of creating a mirror image from the other drives in the array. These drives tend to go unrecognised by the rest of the array because the data is corrupt and often incomplete mirrors are found on these drives if they are still recognised by the RAID management software as being mounted.
RAID Array Mechanical Failures:
Bearing in mind that the drives in a RAID setup are the same as those in your own PC or office desktop PC the same kind of problems can befall them. From failure due to general wear and tear and overwork through to problems with failing controller cards and/or failing firmware. Taking into consideration a single RAID hard drive that operates at 7200RPM. If this drive is accessed by just two users a day for eight hours at a time then that equates to 115,200 revolutions per day. That’s 576,000 revolutions a week, 2,304,000 revolutions during the working month and in total over 27,500,000 revolutions in a year. It is understandable therefore that a drive would fail having this kind of traffic passing through it. And that is only on the basis of two users accessing it. It is difficult to tell exactly how long a hard drive should last but some reports say that a hard drive should last around 4 years, providing they make it passed their first anniversary.
RAID Server Rebuilds and Hot Swapping:
There are two different kinds of RAID setup available on the market today; the older setup that involves downing the entire system to replace a faulty hard drive or the newer model that allows for what is known as ‘hot swapping’. Hot swapping is simply a means by which a defunct hard drive can be removed from a RAID array without powering down the whole system and having all of your workforce log out. Although this may seem like a faster way of doing things (and to an extent it is) there is still a risk, as with a full RAID rebuild that the drive will not mount properly thus failing to produce a mirror from the other drives. This is where we are Newcastle Data Recovery come in as we have many years experience in dealing with failed RAID rebuilds.
RAID Server Firmware Failures:
RAID firmware software is written onto the motherboard of the RAID device as well as onto the hard drives contained within the array. Some motherboards within ordinary PC setups contain some firmware functionality but to be able to cope with a larger number of hard drives a RAID controller card is necessary. It too comes with its own firmware and there are occasions with either the controller card or the motherboard within the array can suffer as the result of corrupted firmware. Firmware can, in some instances, be updated or replaced but if you are in any doubt as to whether or not this can be done please contact us here at Newcastle Data Recovery
Faulty Raid Controller Cards Used in Conjunction with Networked Systems:
The RAID controller card in your PC is there to provide you with the ability to use more than a designated number of hard drives in an array as specified by your PCs own motherboard. It’s a similar principle to adding a wireless card to your PC to allow the receipt of a wireless signal only in this instance you are allowing your PC to cope with the addition of more that a set number of hard drives and to allow the passing of information between them via your PC on a network. Controller cards can sadly fail just as any peripheral card can and there are a variety of reasons for this. The card might not be a new one and might have been in use elsewhere for some time or the firmware contained on it might not be up to speed. Whether the reason for its failure though we are www.newcastle-datarecovery.co.uk are here to help you with finding the right replacement controller card and also producing an accurate recovery of your data