Buy HP DL120 G9 (4xLFF)/1 x Intel Xeon E5-1620v3/16 GB/4x4TB

Buy HP DL120 G9 (4xLFF)/1 x Intel Xeon E5-1620v3/16 GB/4x4TB

There can be many good reasons for using RAID. A few are; the ability to combine several physical disks into one larger “virtual” device, performance improvements, and redundancy.

It is very important to understand that RAID is not a substitute for backups. Some RAID levels will make your systems immune to data loss from single-disk failures, but RAID will not allow you to recover from an accidental “rm -rf /”. RAID will also not help you preserve your data if the server holding the RAID itself is lost in one way or the other (i.e. raid controller failure, earthquake, etc.) RAID will generally allow you to keep systems up and running, in case of common hardware problems (single disk failure). It is not in itself a complete data safety solution. This is very important to realize!

There are various raid level available, giving different trade-offs of protection against data loss, capacity, and speed. RAID levels 0, 1, 5 and 10 are the most commonly found, and cover most requirements.

– RAID 0 (striped disks) distributes data across several disks in a way that gives improved speed and no lost capacity, but all data on all disks will be lost if any one disk fails. Although such an array has no actual redundancy, it is customary to call it RAID 0.

– RAID 1 (mirrored settings/disks) duplicates data across every disk in the array, providing full redundancy. Two (or more) disks each store exactly the same data, at the same time, and at all times. Data is not lost as long as one disk survives. Total capacity of the array equals the capacity of the smallest disk in the array. At any given instant, the contents of each disk in the array are identical to that of every other disk in the array. At LeaseWeb, by default RAID 1 will be provided only on the first two disks of the server. The remaining disks are left unconfigured.

For more information, see the RAID article on our Knowledge Base https://kb.leaseweb.com/display/KB/RAID

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