Discussion
Gaffer said:
www.acnc.com/raid.html
good link, I understood basic raid setups but this explains things very well.
Cheers
Paul
Ok, I think I understood that... can you confirm if I got that right...
My board supports 0, 1 and 0+1. If I go for raid mode 0 and I put two 80Gb drives configured for raid then I get one 160Gb logical drive but better performance that if I configured the two drives to run on say IDE-0 on a normal pc. The disadvantage is that if one of these drives dies then I lose all data on both as my logical drive is now dead. If I add another 120Gb drive I happen to have on one of the IDE sockets that isn't a RAID one (this board has 4 IDE sockets) then do a daily back up of the important stuff onto the 120Gb drive then I should be cool.
Does that sound about right?
If I use 2 80Gb drives (which I already have), would it matter if one was a 7200rpm drive and the other was a 5400rpm? I can't remember if they actuslly are different but sod's law say they will be.
Thanks,
Mark
My board supports 0, 1 and 0+1. If I go for raid mode 0 and I put two 80Gb drives configured for raid then I get one 160Gb logical drive but better performance that if I configured the two drives to run on say IDE-0 on a normal pc. The disadvantage is that if one of these drives dies then I lose all data on both as my logical drive is now dead. If I add another 120Gb drive I happen to have on one of the IDE sockets that isn't a RAID one (this board has 4 IDE sockets) then do a daily back up of the important stuff onto the 120Gb drive then I should be cool.
Does that sound about right?
If I use 2 80Gb drives (which I already have), would it matter if one was a 7200rpm drive and the other was a 5400rpm? I can't remember if they actuslly are different but sod's law say they will be.
Thanks,
Mark
If you can select RAIDs 0,1 and 0+1 then with 2 drives your options are limited to 0 and 1.
0 is striped, where the data is read/written using both drives simultaneously, sharing the data between them. This is quicker, but if one drive dies you've lost everything.
RAID 1 is mirrored - so if one drive fails you've got a carbon copy to be going with.
RAID 0+1 is striped and then mirrored (or is it mirrored then striped?!) - this means you've got speed and redundancy, but takes 4 disks. RAID 1+0 is better then RAID 0+1, but you don't seem to be offered that...
So - is it safety or speed that you want?
0 is striped, where the data is read/written using both drives simultaneously, sharing the data between them. This is quicker, but if one drive dies you've lost everything.
RAID 1 is mirrored - so if one drive fails you've got a carbon copy to be going with.
RAID 0+1 is striped and then mirrored (or is it mirrored then striped?!) - this means you've got speed and redundancy, but takes 4 disks. RAID 1+0 is better then RAID 0+1, but you don't seem to be offered that...
So - is it safety or speed that you want?
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