RAID

RAID (redundant array of inexpensive drives (or disks), refers to a data storage scheme using multiple hard drives to share or replicate data among the drives. The benefit of RAID is to increase data integrity, fault-tolerance, throughput and/or capacity, compared with single drives. In its original implementations, its key advantage was the ability to combine multiple low-cost devices using older technology into an array that offered greater capacity, reliability, speed, or a combination of these things, than was affordably available in a single device using the newest technology.

MTBF

MTBF (Mean Time Between Failure) is the average time between failure of a system. Well, the system we use should be fail sometime. I'm talking about harddisk now. We use a harddisk as a storage. We put data in it. You can figure this, if you are doing some reports and the harddisk crash. What should we do? Panic! it's normal.

Well we don't want that happened to you.

Here's a few steps to anticipate it.

1. know your system, read the mtbf of your system (or you can ask the seller)
2. back up your data