Raid 1 recovery

Data recovery from Raid 1 systems. From all makes of server and raid 1 controllers. From NAS systems and SAN or DAS and other external single and multi-drive drive systems that are utilising Raid 1.
Raid 1 systems usually consist of two drives. The second drive is an identical copy of the first drive this allows for redundancy - if one drive fails then the system will continue to work with the remaining drive but in what is known as 'degraded' mode. Above is a diagram of a pair of Raid 1 drives. When Raid 1 failures happen, it is important to identify which drive had failed first. Often they will run after a failure, If a failure is not noticed or not acted on and one drive failed before the other there will be a lag in the copies of the data.

RAID 1 is best suited for critical systems that must have zero or very little downtime. For example, an eCommerce - web server, if this were to fail then your business would start losing money the moment it failed. With RAID 1 in place the server would keep running after a single drive failure and a spare drive could be inserted and rebuilt automatically without any downtime.

The drawbacks of RAID 1 are that writes to the drives are take longer as for each change there are two writes and two verifies, however reads are similar to that of RAID 0 where a controller can be set to read ahead. This means that when data is read, the blocks are read as if it were a RAID 0.

MjM Data Recovery offer a no recovery no fee for all our services including Raid 1. Please phone us on 0800 072 3282 and ask to talk directly to one of our RAID engineers.

Testimonial

"We have used MjM Data Recovery for several years, they have always provided a quick and efficient service, with great customer support. Highly Recommended."
G Edwards, Symantec