Add-on technologies like virtualization or database applications can also spell disaster for a business if the system were to fail. From a data recovery perspective, it would usually be necessary to reconstruct the RAID file system and bypass any physical failures as well as assess any virtualized architecture that may exist.
This process can often make a recovery attempt extremely complex and time-consuming; however, in many cases data recovery can be very successful. Unfortunately drives can and will fail at some point in their lifetime.
If a failure occurs involving individual drives assuming it is a RAID 1 or greater , the faulty drive can just be replaced with a new one and the data storage map can be rebuilt with zero data loss. However, if a drive failure exceeds the redundancy capacity of the RAID, a professional raid data recovery specialist should be contacted immediately for the best chance of recovering your data.
It is imperative to make sure that your chosen provider has the tools and expertise to recover from any configuration or data loss situation. You should also assess whether they have direct partnerships with storage vendors and development capabilities for accommodating new or custom configurations.
Have you recently experienced RAID data loss? Contact the experts at Ontrack for help retrieving your mission-critical data. How does RAID work? Nonetheless, using your computer to manage a RAID array means that its CPU will have to do a lot of work, so this is only practical if you have a computer that is only storing files. While RAID arrays can provide enhanced data protection, their extra disks should not be considered as backups.
If your main drive is a RAID array, you still need to back it up. This could be, for example, two standard 8 TB drives, where you back up part of the total storage on the RAID array to each drive. The RAID array appears to your Mac as a single volume, so any backup software, such as Intego Personal Backup , can copy files from those devices to other drives.
You can configure the backup software so it copies its backups to the RAID array. Multiple disks are combined with different goals in mind, hence the different variations. Each fitting for a particular purpose see list below. The different variations come with different levels of speed, reliability, availability and the minimum number of hard-drives needed.
Specially the more affordable models often implement RAID in software. Note that not all software RAID solutions allow you to boot your computer from! Windows and MacOS X do not seem to have much of a problem with that and both even have a software RAID solution standard available although not often used. The downside of RAID in software is that it performs slower than hardware implementation, although modern solutions perform pretty well, and possibly less reliable compared to a hardware solution.
Your choice can be influenced by quite a few factors and I usually start out with these questions:. For me reliavility is more important than speed anyway, therefor I chose RAID 6 for my configuration. Note that with all RAID variations, similar sized drives are required.
Backups however have the advantage that you can actually resort to older backups if needed. RAID however will not give you that ability.
Once something a file is updated on your RAID setup, the data will be [high probability] lost. In RAID 0 data is written in parallel to 2 or more disks. Think of it as writing block 1 to disk 1, block 2 to disk 2, block 3 to disk 3 etc. Another advantage is that all of the storage capacity will be available for storage.
CON : The big downside is lack of reliability. If one disk crashes all data is gone, as half of the information will be lost.
RAID 1 arrays mirror de data of one drive to another drive. So when your computer writes data to the array, the controller will actually write the data twice: to disk 1 and to disk 2. PRO : Increased reliability since data is always saved in duplicate on two different drives.
If one drive dies, the other will still be able to provide you the data. CON : Not very efficient when it comes to remaining storage , as you need at least two the same drives, but in the end only have the storage space of only one drive.
RAID 2 uses striping on bit level, which theoretical could come with very high transfer rates speed. However, at this point there are no commercial applications available that utilize RAID 2. Minimum number of required drives : 3 drives. PRO : Possibly very high transfer speeds. Set the system to data protection mode also known as mirrored mode or RAID 1 and the capacity is divided in half.
Half of the capacity is used to store your data and half is used for a duplicate copy. If one drive goes down your data is protected because it's duplicated.
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