cleverlymadeup said:
SuperFriendBFG said:
Um no... RAID increases the speed at which a system can access a file (or several). Having different parts of the same file being saved on separate drives means that the system can actively use the bandwidth of multiple drives to load the same file as opposed to using a single drive. The actual read write speed for each drive does not increase though.
Also RAM speed had very little to do with the computer's performance in the video. The RAM they used was 800mhz. We have ram that goes at 1333mhz these days. With that many drives running under RAID though, the read/write speed of the drives is actually faster then the RAM, but for many SDD/HDD functions like copying and moving files, your system won't even touch the RAM.
If there's a slower drive in the RAID then that just means that accessing whatever parts of a file on that drive will be slightly slower, which yes it does affect the total access time.
not with any of the RAID configs i've used over the years in the various corporate environments i've worked in and server farms i've gotten to play with and you certainly can't add them up
also ram is VERY important in any system, as the ram helps to handle the reads and writes of the hard drives, ram can be one of the bottlenecks in a system
Also for their Defrag, you'll notice you can actually see how many files the system defragged in the video. The tests were NOT done on a system that had just the OS, Office and a few files installed, there were other things (Steam being one of them) installed on it as well. I think I saw the number being at around 24,000 files (56.17GB).
ok i never said "just the os" i said "brand new install" there is a big difference as with a "brand new install" you typically also install the software you are wanting to use on the system as well as the operating system
when you first install a system there is very little fragmentation because most of the files get to be allocated contiguously and therefore not be fragmented
The whole purpose of a RAID setup is to increase the read/write speed of an array of hard drives. If you're running separate hard drives that are not set up in a RAID then all you have is a large number of drives not really working together but independently.
It's the exact same idea as having two 2ghz cores instead of one. The tasks are split up between the two cores so they both work in tandem thus increasing the speed and efficiency of the calculations. A RAID setup does the exact same thing but with hard drives.
Also, when you copy a file from one drive to another your RAM isn't even used. The data doesn't even touch the RAM, this saves time. What would be the point really. The system would copy the information into your RAM only to then copy it again to its destination. Only when a program or file is read and opened is it ever saved into your RAM.
You may see RAM usage in copying or moving files when the drives are slow and the system will then start an information cache in the RAM, but in the case of this experiment the array of drives is fast enough that the computer does not need to do this, as it would end up slowing down the entire process as opposed to speeding it up.
Also RAID means Redundant Array of Independent Disks, not random.
RAID's various designs all involve two key design goals: increased data reliability or increased input/output performance. When multiple physical disks are set up to use RAID technology, they are said to be in a RAID array. This array distributes data across multiple disks, but the array is seen by the computer user and operating system as one single disk. RAID can be set up to serve several different purposes.
* 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.
* RAID 5 (striped disks with parity) combines three or more disks in a way that protects data against loss of any one disk; the storage capacity of the array is reduced by one disk.
* RAID 6 (striped disks with dual parity) (less common) can recover from the loss of two disks.
* RAID 10 (or 1+0) uses both striping and mirroring. "01" or "0+1" is sometimes distinguished from "10" or "1+0": a striped set of mirrored subsets and a mirrored set of striped subsets are both valid, but distinct, configurations.