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Do you mean add a disk to an already existing raid array, or can you have more than the 3 disk minimum? Either way, yes you can, though I find if you already have raid 5 setup with 3 disks and you want to add another one you are better off starting it all over from scratch again. As far as I can remember, I may be wrong, but all the disks have to be equal. You cant have a three 40GB drives at 5400rpm and then add in a new drive off 120GB at 7200rpms. And are you using a raid 5 hardware option or software option. If your doing it via hardware you may need to upgrade your disk controller. And dont forget your going to have convert your new disk when you get it. Drives are usually basic, raid5 wont work on a basic disk. Actually you can add disparaging disks to an array but you'll only get the capacity of the existing disks in the array - therefore in the above setup, adding the 120Gb@7200rpm wouldn't give you the capacity of the 120Gb, only an additional 40Gb.
What else can I help you with?
Will raid 5 support different speed hard drive?
For Raid 5 all the hard drives have to be of the same speed.
The drive conigurations supported by windows xp professional provides fault tolerance?
RAID 1, RAID 0+1, RAID 5 and 6.
Can I add another disk to a 3 disk raid 5 array on a WD sharespace NAS?
Looks like that model can take 4 drives, so yes. Keep in mind, your 4th drive must be EXACTLY THE SAME (manufacturer, size, model, etc.) and your other 3 drives. Check with the manufacturers instructions on how to properly add a drive to your array.
Which RAID level stripes data across multiple drives to improve performance?
Every RAID level stripes data across multiple drives, which improves performance compared to using a single disk. RAID 0, RAID 1, RAID 1+0, RAID 5, RAID 6, etc. all have better performance than a single disk. Other than RAID 0, all other RAID levels provide fault tolerance. RAID 1, RAID 1+0, RAID 5, RAID 6, etc. all have fault tolerance.
Why RAID 5 is more fault tolerant than RAID 0 and RAID 1?
RAID 5 is more fault tolerant than RAID 0 and RAID 1 because it uses striping with distributed parity, allowing it to withstand the failure of one drive without data loss. In contrast, RAID 0 offers no redundancy, meaning that the failure of any single drive results in total data loss, while RAID 1 provides redundancy through mirroring but requires twice the storage capacity. Therefore, RAID 5 strikes a balance between improved performance and efficient storage utilization while still providing a level of protection against drive failures.
Which RAID in computers is the fastest?
RAID 0 is generally the fastest RAID level. It uses two hard drives at the same time, with each drive sending and receiving different data. The data is usually "striped."
Which is faster raid 1 or raid 5?
raid 5
What is a RAID controller and what bennefits would you receive?
RAID stands for "Redundant Array of Inexpensive/Independent Disks". RAID works by combining two or more hard drives. It can increase performance and/or data redundancy and/or capacity. There are many different RAID types, the most common being RAID 0 (stripe), RAID 1 (mirror) and RAID 5 (stripe with parity).In a RAID 0 (stripe) array, data is split equally between the number of disks in the array. For example, when a 2 MB file is written to a RAID 0 array with two hard drives, the file is split in to two parts and 1 MB of data is written to each hard drive. This increases capacity and performance, but sharply decreases redundancy since only one of the drives needs to fail for all information to be lost.Performance = Drive Speed * Number of DrivesCapacity = Drive Size * Number of DrivesRedundancy allows for no drives to fail.In a RAID 1 (mirror) array, a complete copy is written to each hard drive in the array. Capacity and performance stay the same, but redundancy is increased. As long as one drive works, you will not lose data.Performance = Drive SpeedCapacity = Drive SizeRedundancy allows for all but one drive to fail.In a RAID 5 (stripe with parity) array, you need at least three hard drives. Files are split up to all but one of the drives (similar to RAID 0) and a parity bit is written to the last drive. This increases performance, capacity and redundancy. Performance is not as good as RAID 0, but still better than RAID 1. Redundancy is not as good as RAID 1, but is still quite reliable.Performance = Drive Speed * (Number of Drives - 1) (Theoretical)Capacity = Drive Size * (Number of Drives - 1)Redundancy allows for one drive to fail.There are other RAID levels, but they are not as common.The main benefit of using a RAID array is data redundancy and/or performance.Non-commercial (home) users and enthusiasts wanting a very large increase in performance (theoretically multiples of the number of drives used) usually go for RAID 0 since they often are not too worried about drive failure and they enjoy the larger drive capacities that it provides.Small businesses who only need cheap redundancy usually go for RAID 1. If one drive fails, the drive can be replaced and the mirror array restored.Larger businesses or those needing file/database performance go for RAID 5. They can afford the price of an extra drive and a more expensive RAID controller. RAID 5 provides high performance with large capacities while still maintaining data redundancy and is the most desirable in a business or enterprise environment.There are some other options for RAID such as RAID 10 or RAID 01.RAID 10 features two separate RAID 0 arrays which are then mirrored in a RAID 1 array.RAID 01 is the opposite, with two separate RAID 1 arrays which are then striped with a RAID 0 array.There are other non-standard RAID levels, but most are rather uncommon.Alternatively, there is also drive spanning (aka JBOD), but this provides no extra redundancy or performance. Drives are "glued", if you will, end to end.The benefits of each RAID level vary. The type of RAID used depend on the job it must fulfill.
What uses multiple disks to create one functional drive with parity spanning all the disks?
RAID 5
What are Levels of RAID 0 1 5 and Which one is better and why?
RAID 0 is the best for speed because it uses "data stripping". That means if one drive fails, all you have left on the other one is useless bits and pieces of your files. That means one drive failing will corrupt ALL your data. If you choose RAID 0, you MUST back up your data at the very least every day. Preferably every hour. Automatic back ups is a good idea anyway. RAID 1 uses "mirroring". When you save a file, it gets saved to BOTH drives. Putting drives in RAID 1 does not make the system faster. That means if one drive fails, the other one will still contain all your data. The problem with RAID 1 is that you only get HALF of the space you bought. For example, if you put 2 drives with a 3TB capacity in RAID 0, you would have 6TB. 2 drives with 3TB each in RAID 1 would mean instead of 6TB, you would only have 3TB. The reason for that is because both drives contain the EXACT same data. RAID 5 is pretty good for speed and if 1 drive fails, you can just replace it and rebuild the RAID 5 array without losing any data. RAID 5: RAID 1: RAID 0: I would create a RAID 0 array to store your files and if you care about any of the files you would store on your computer, a RAID 1 or RAID 5 array (I would recommend RAID 5) to back up your data to. I hope this helps.
What type of volume uses 50 percent of available drive space to provide fault tolerance for the volume?
raid 5
Which RAID level mirrors one hard drive with a second drive so that the same data is written to both drives?
That is RAID 1. It uses two drives with identical data so if one fails, you have the other drive. One variation of RAID 1 used by certain controllers is to write as RAID 1 but read more like RAID 0 (but without the striping). That way, you have the write protection of a mirrored set, but can use the two drives to do interleaved reads for a read performance boost.
