RAID configuation for speed
- Thread starter Jon12345
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You would need 4 drives for raid 1 + 0 and you would only see the capacity of 2 drives
raid 0 - striping, splits the file between two disks for speed
raid 1 - mirror , keeps a second copy on a different drive
to mirror a raid array requires 4 drives and since 1 array is a copy of the other you only get the capacity of one raid 0 array.
What are you using the system for?
Raid is only faster in some situtations.... lots of threads in it in here if you search around
AD
raid 0 - striping, splits the file between two disks for speed
raid 1 - mirror , keeps a second copy on a different drive
to mirror a raid array requires 4 drives and since 1 array is a copy of the other you only get the capacity of one raid 0 array.
What are you using the system for?
Raid is only faster in some situtations.... lots of threads in it in here if you search around
AD
With two disks you can either do RAID0 (striping) or RAID1 (mirrored). To do RAID10 or RAID0+1 (mirrored stripes or striped mirrors) you need 4 disks.
RAID0 will give a sustained transfer rate of about 60-80% above that of a single disk although the random access time will be a bit longer than that of a single disk. Whether either makes any difference to your experiences will be dependent on what you're using the machine for. If you have a search there's a big thread about this in the forum.
What ever you do don't confuse a redundant array with a backup. RAID1 is not a backup, all it does is allow you to continue operating if one drive fails. You still need to backup your data separately.
RAID0 will give a sustained transfer rate of about 60-80% above that of a single disk although the random access time will be a bit longer than that of a single disk. Whether either makes any difference to your experiences will be dependent on what you're using the machine for. If you have a search there's a big thread about this in the forum.
What ever you do don't confuse a redundant array with a backup. RAID1 is not a backup, all it does is allow you to continue operating if one drive fails. You still need to backup your data separately.
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If you are after a faster system with a bit of redundancy see if you controller supports Raid 5, Striping with Parity. You would only require minimum of 3 drives all of the same size and you would see the capacity of two, and it can cope with having a single drive fail.
e.g. 3 x 100GB = 200GB visable by windows
Here's some more infor on Raid systems:
http://en.wikipedia.org/wiki/RAID
e.g. 3 x 100GB = 200GB visable by windows
Here's some more infor on Raid systems:
http://en.wikipedia.org/wiki/RAID
RAID5 does have its benefits however most motherboard based controllers do not have any hardware support for the XOR parity calculations so the write speeds will be very poor - 20MB/s is about what you can expect (a single drive can write at up to 80MB/s). If the swapfile is on that array then the system is going to feel very sluggish.