I have a question regarding RAID set up, I am not too familiar with it, but all I want is a second HD to synchronize all the data of the second HD so when one of them burns out the other one takes the job.
I just want to install this on my windows xp pro 64 bit machine at home.
My questions are:
1)Raid 1 or raid 0? which one is the best? I have also heard of RAID 10,good or not?
2)Can you install a RAID drive even if windows has already been installed?
3)do you need the same brand of HD?OR WILL 2 HDs of different brand but same size will work?
4)what is the best way to install a RAID drive?chaing bios settings?installing drivers?
1. RAID1 is two drives mirroring eachother. One drive fails and you still have the other drive with all data on. Note that if data becomes corrupted then it will be corrupted on both drives. RAID0 is data striped accross both drives, it offers no redundancy and increases the risk of data loss by factor of two, since if one drive dies then you lose all data.
RAID10 is striping plus mirroring, correctly called RAID 1+0 but many people call it RAID10. You need 4x hard disks for RAID10.
2. If its going to be your boot drive then you will need to re-install windows.
3. If using RAID1 the array will only be the size of your smallest disk, so its best to get drives the same size. I would reccomend getting different brand drives, or buy them from different suppliers so you get a different batch. That reduces the chance of both of them failing at a simular time.
4. How will you be implementing the RAID? There are essentially 3 ways.
A - Software RAID provided by the OS. In windows this is called Dynamic Disks. In Linux this is called MD raid, or linux kernel raid. The operating system provides the RAID.
B - Software RAID provided by the BIOS. Some motherboards have hardware raid, but its most likely your motherboard provides software, otherwise called FakeRAID. Again the RAID is handeled by the OS through the RAID drivers. If you have an Intel PC, the Intel Matrix raid is actually OK. If you have an AMD based system you will most likely have nVidia RAID, while it's OK it's tools within windows are not particuarly good.
C - Hardware RAID via a dedicated RAID controller, e.g. Adaptec 2405, 3Ware 9650. TThe lower end adaptec cards use "HostRAID" technology, which is again software based.
If you go with the BIOS option, enable the RAID in your bios, and you will have to press CTRL+I or something simular on boot, to get into the RAID bios. From there you can create your array. Note that when you create the array, all data will be destroyed.
Thank you so much for this wonderful explanation, I now understand a little more about everything.
One thing I wanted to say and made me laugh,is when you said:
If using RAID1 the array will only be the size of your smallest disk, so its best to get drives the same size. I would reccomend getting different brand drives, or buy them from different suppliers so you get a different batch. That reduces the chance of both of them failing at a simular time.
Well, Believe it or not, I had 2 500GB 10000 rpm HDs 2 months ago, with 10 years of music programming, all my work, both drives filed exactly at the same time.
Someone is going to try in 2 months to open them in a vacuum glass and replace something in it and try to make them work again,my data was so important........................i had ties in my eyes to be honest...
Anyway,both HDs had the same batch number!!!!I have never thought about that!