Server - Replacing a failed hard drive (hot swappable) скачать в хорошем качестве

Server - Replacing a failed hard drive (hot swappable)

https://www.duskandawn.com/ http://tee.pub/lic/Bk5Z_9oOo94 In this video I am showing how to replace a bad hard drive on a Dell R720 server. I am inside a data centre so it is very loud. Turn on subtitles to know exactly what I am showing you. You may be wondering how I replaced one of the hard drives while It was still running, and while I was still using it. The reason I was able to do this, is because the servers numerous HD's allow me to do so, as well as a feature enabled in the BIOS. The HD's are set up in a configuration called RAID 10. (Redundant Array of Independent Disks) This means in simple terms, that although I have 8 HD's in total, only 4 are usable for space, why? That is what RAID 10 is doing. RAID 10 means that there is 4 pairs of disks, 2 disks will have the same data on each disk, if one disk fails, the other is still serving up the data in that pair. This allows the server to keep functioning like everything is still fine. I am able to do this while the server is still running because the server itself doesn't know a hard drive has failed, only the BIOS does. which is why when I insert the new HD it notices that its empty, and that it should have the data on its buddy disk, and starts to rebuild automatically. A very cool efficient feature, but let's say both HD's in the same pair fail, the server will crash. In total 4 HD's can fail and this server will still run, but you can't have 2 HD's in the same pairing fail or else the server will crash.