RAID Server Common Problems:
A RAID server is used for the storage and retrieval of larger than normal volumes of data and allows for more than one user to have access to it at any given time. Obviously the possibility that these arrays, and their hard drives in particular, may suffer failure due to heavy traffic. This is more so the case because of the reduced periods of down time these devices enjoy. RAID devices are becoming more common in many IT infrastructures and with that in mind many companies turn to us here at www.advancedharddriverecovery.co.uk for help and advice when their RAID devices fail. We have experienced engineers on hand with a wealth of knowledge as to the many different configurations of RAID setup, should a problem arise. Problems such as data that has been saved to bad sectors, failing controller cards, missing partitions and the failure of a rebuild are common ones that our experts are called upon to deal with as part of their daily business.
Hard Drive Mechanical Failure in RAID Systems:
The corruption of more than one disk in your RAID array is something that you might consider to be an impossibility but the problem does rear its head and in our 15-years dealing with RAID devices we have witnessed it happening on a number of occasions. Problems leading to multiple disk corruption are often in the mirroring process as damaged files are transferred from one drive to another. While disk management utilities are used check on the processes of a RAID array, usually done from a PC with a controller card onboard attached to the network), they often fail to spot potential problems. This is particularly so when caused by the mirroring of corrupt or damaged files.
Rebuild Issues with RAID:
One of the most common problems we at www.advancedharddriverecovery.co.uk find ourselves being asked to deal with is why has a RAID rebuild failed? We have answered the call for help on numerous occasions from personnel who have followed the instructions carefully; only to find that their attempts at the latest rebuild are proving difficult. RAID 5 rebuilds are a common issue because all that is needed is for one component to be faulty or to operate below par. Many new RAID devices offer ‘Hot Swapping’ as standard but problems can still occur if the drive inserted has been elsewhere with an underlying issues that has gone undetected.
RAID Firmware Failures:
RAID setups contain firmware just the same as a desktop computer and problems arise if the program that governs each of the drives becomes corrupt. A common issue with firmware used in RAID devices is that it suffers a failure to be recognised thus leaving any user trying to access data to be presented with a message telling them that the RAID device is not present or has failed. Sometimes it can be the BIOS that has experienced a settings’ glitch and has reset itself which renders the original RAID settings no longer valid. A lot of our clients have contacted us after having reseated (reinstalled) their RAID components only to find a problem still exists. And often a firmware upgrade will not solve this problem. Here at www.advancedharddriverecovery.co.uk we have over 15-years experience dealing with RAID and its subsequent issues. Contact us to instigate the first steps in recovering all RAID data safely before a rebuild can be retried.
Problems With A Faulty Controller Card:
There are two types of RAID controller in existence – the software controller and the hardware controller in the form of a controller card. Most motherboards can deal with two hard drives at once and anything above this requires the installation of a controller card to operate correctly. Taking this into account a controller card is needed to facilitate an increased number of drives in an array. And while software controllers are available hardware controller cards are often the chosen method for increased stability. As a hard drive has firmware so too a RAID controller card has and if the firmware fails so too does the controller’s ability to determine how the drives work together.