RAID Data Recovery
RAID array Data Recovery can be one of the most challenging data recovery cases. RAID data recovery process is working with multi-disk systems on Windows Server, Unix, Linux, VMWare operating systems, NAS stations data recovery from such as qNAP and Synology.
Data Service is a professional RAID data recovery Kyiv company. We have extensive RAID recovery experience.
Our protocol provides making images of all disks in a failed RAID. Thus, we can restore the array with these images, we do not work directly with your disks, which allows us to avoid further data corruption and aggravation of the situation.
You can call us back and tell us about the RAID failure you experienced. Our lead engineer has extensive experience in RAID recovery and is well versed in all RAID levels and related issues.
Types of RAID arrays
There are many RAID types, from the simplest RAID 0 to the complex RAID 0 + 1. Below we briefly describe the three most common tiers of disk arrays.
RAID 0 (STRIPE)
RAID 0 is also known as a striped volume because data is striped and the data streams are written to multiple drives in the array at the same time. This makes the disk array very fast because the read and write time is divided by the number of disks used, so if a RAID 0, for example, has 4 disks, the array will be about three times faster than one disk. However, because data is literally split between disks, if one of the disks in an array fails, data is lost because RAID 0 does not provide fault tolerance or redundancy. This configuration is usually used when the main target is speed and nothing but speed.
- Benefits: Speed data transfer
- Disadvantages: No duplication and backups of user data array stored
RAID 1 (MIRROR)
RAID 1 consists of an exact copy (or mirror) of a dataset across two or more drives. Many modern home NAS systems, such as Western Digital my Cloud Duo, can be configured either as RAID 0 or RAID 1. This raid configuration does not offer parity or striping across multiple drives, and since data is mirrored across all drives, the array can only be with the smallest drive capacity. The big advantage is that the array will continue to work as long as at least one physical drive from the entire array is healthy.
- fail-safe, redundancy
- capacity limitation; data exchange rate not very high.
RAID 5 (PARITY)
RAID 5 is probably the most common array type used by small and medium-sized businesses. With RAID5, data is stripped and spread across all disks, making the array fast and efficient like RAID0. However, unlike RAID0, the array also stores the parity data (backup data). This means that one disk from the array can fail and the array will continue to operate using distributed parity data from the remaining disk drives. If one disk fails, you can insert a new disk and complete the array rebuild. The minimum number of disks in RAID 5 is three. We strongly recommend configuring your RAID with four HDD`s minimum.
- fail-safe, redundancy, capacity.
- reduced capacity (the actual capacity of the raid array is less by one capacity of the disks of which it consists)
RAID Reliability. Why is a RAID array dangerous? Things to watch out:
There is no doubt many RAID options are great for businesses, but business owners should not relax. You should check the health of your RAID array on a regular basis. Remember that if RAID 5 one drive fails in, the RAID will continue to work normally, giving you a false sense of security that everything is fine. The problem becomes when the second drive fails too and the data cannot be accessed.
The most common case when creating a RAID array is all drives were purchased at the same time, of the same model, from the same manufacturer, so if one of the drives fails for any reason, it is possible that the other drives can fail at the same time. To avoid such situations, we recommend purchasing HDD`s of the same capacity, same characteristics, but different models and brands.
And the last thing – how to avoid RAID array data recovery – pay special attention to power supply – both upstream (smart UPS) and output (high-quality server power supply) protection. There have been cases when all array drives failed due an increased voltage surge.
Even a RAID system force majeure happened, and the data is no longer available – in any case, do not try to fix anything by yourself. Pressing the rebuild button in the raid configuration menu is often perceived as a lifeline. In fact, this option can permanently destroy your data if one or more array drives fail.
If there was some force majeure with the RAID system, the data is no longer available – in any case, do not try to fix anything yourself. Pressing the rebuild button in the raid array menu is often perceived by non-professionals as a lifeline. In fact, this option can permanently destroy your data if one or more drives in the array fail.
Let the professionals help you!
Prices for RAID and server systems data recovery,
Drive diagnostics, fault detection - Free of charge
| RAID Level | Base Cost from, UAH: |
|---|---|
| RAID 0, 1, 10, 0+1 | 2800 |
| RAID 5 and others | 7000 |
Terms and Conditions
You only pay for the results you are satisfied with. Otherwise, you do not incur any financial costs.
After completing the order, we will definitely keep a duplicate of the recovered data until you make a backup copy of the recovered information at your place of use on an additional medium and notify us about it.
Order lead times are usually 2 to 5 business days. Urgent or emergency terms is available. The conditions of such orders are negotiated separately.
