Can someone explain this to me?

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nlr

nlr

nlr

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Hello,

I am new to computer building and I was wondering what is Raid 0 and Raid 1 because on my previous build I haven't use Raid configuration before and I would like to know some examples on how its beneficial to you (please give me real life examples)

Best of regards,
Nick.
 
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nick

the basic concept is:

raid 0 and raid 1 is a way to use two or more hard drives

raid0 = two hard drives joined together to make one large volume

ie.. 250 gb x 2 = 500gb of space

the idea is that you have two controller connections so you can read and write to the two drives at the same time and in theory double your speed (not in practice)

Raid 1 is to use two drives , one copies to the other as a back up of the first

so 250gb x 2 will = 250 gb of space but have two drives with identical information in case one fails
 
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RAID0 = Striping. Data is split across the two (or more) disks thereby allowing both disks to read simultaneously increasing (although not doubling) the sustained transfer rate. Due to having to deal with two sets of heads the random access time will be slightly more than a single disk. Capacity is the size of the smallest disk multiplied by the number of disks (so full capacity of 2 if they're identical). Problem is that if a drive dies then the entire contents of the array will be lost.

RAID1 = Mirroring. The same data is written to both disks to provide redundancy. Transfer rates are about the same as a single disk although writes are sometimes a touch slower. Capacity is that of the smaller of the two disks in the array. If a drive dies it can be replaced and the controller will automatically copy the content of the array onto the new disk. What is important is that RAID1 is a redundancy solution not a backup.
 
Thank you so much for both of your explanations I have understood fully :D

Can you use these Raid configuration on SSD?
 
I think you guys missed the underlying subtlety of his post!

nlr said:
I didn't use no Raid configuration
Click to expand...

That means he has previously used a RAID configuration!
*waits to be shouted out of the thread*

Edit:

And yes you can use them on SSDs
 
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Usually I see people with a SSD for the OS and 1TB for the data and I was wondering how does that work?


Would that be a joint capacity or 2 separate Hard drives on "My Computer" and wouldn't that be inconvenient saving things in different places?

Sorry for all my stupid questions.
 
Regarding the disks used in RAID 0 configurations. is it best for them to be the same type of disk? I have a 'very' old 300Gb and a new Seagate barracuda 1TB the CACHE's are different. Could I still RAID 0 them or no go?

Perhaps 2*1TB Seagate Barracuda RAID 0 and 1 SSD for OS/Games/Major Apps is what I should aim for?

I've never done RAID before. RAID Noob. Will read more on the subject.
 
Also remember with Raid 0, if one disk fails you lose the data on both disks as it needs the complete volume to be able to read it. So you put yourself at double the risk of data loss on that volume through hard disk failure.
 
The RAID array sits at a level below the OS so any backup solution you want to use will work fine with a RAID array.
 
FabienO said:
Regarding the disks used in RAID 0 configurations. is it best for them to be the same type of disk? I have a 'very' old 300Gb and a new Seagate barracuda 1TB the CACHE's are different. Could I still RAID 0 them or no go?

Perhaps 2*1TB Seagate Barracuda RAID 0 and 1 SSD for OS/Games/Major Apps is what I should aim for?
Click to expand...

You can RAID with different models of disk but performance will be limited to that of the slower drive because the faster drive will always have to wait for the slower one. For capacity, if they are different and you are using a HW RAID, then you will normally be wasting the extra space of the larger drive. With some controllers or if using SW RAID you can make another partition out of the extra drive space, but then you have to be careful how you use the partitions to avoid hampering performance. If possible it's always better to go with 2 identical drives.

For drive letters, it's easy to redirect your data e.g. MyDocs to a different drive letter.
 
Thank you for your response. I'm still in two minds about this.

It somewhat depends on my paycheck, but if it's larger than expected. I might go for a Vertex 2E or C300, if smaller then I might buy another Seagate Barracuda 1TB and RAID 0 them. I'd still have my 300GB for backup, but the 300GB is 6+ years old, so I dunno.

I may just wait till end of September when free shipping kicks in and go for the SSD. By then I might have enough for SSD + 2*1TB Raid 0. I do have an External 500GB I could put 'important' stuff on. So much choice -_-
 
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