Raid info

[The Astroman]

Right now, this isn't possible (financially), but it come true one day. Just want to be prepared that day!

What I'd like to do is have 2 Serial-Ata HDDs, I'll came the A and B. I'd put them in Raid 0, but since this is risky if disk failure occures, could I mirror A and B to 2 other HDDs? E.g If drive A fails, drive B will use the other copy of A (and possibly automatically put itself and the copy of A in Raid 0 while waiting I replace original A).

Is that possible? That means 4 IDENTICAL HDDs.

 

[Praetor]

Would[nt] RAID5 suit your needs?

 

[The Astroman]

Is Raid 5 software or hardware?

 

[The Astroman]

Would[nt] RAID5 suit your needs?

How about raid 0+1?

 

[Yeti]

What you described above is RAID 0+1 which mirrors a whole RAID 0 array. RAID 5 will only back up one drive so if more than one drive is lost you're screwed; but overall it will allow for more storage (less redundancy, total storage=(#Drives-1)*size). RAID 5 also takes a bit of CPU performance unless you have a good hardware RAID controller. It is also possible with some modifications to use WindowsXP as a software RAID 5 controller.

 

[The Astroman]

1) Do you need 2 IDENTICAL HDDs to form a Raid?
2) Do you have to format them before making the Raid?

 

[Cromewell]

you don't need identicle HDDs for a raid but you should use 2 identicle drives. You have to format them after you make the raid not before

 

[Praetor]

Is Raid 5 software or hardware?

All RAID is hardware. Software RAID is an attempt to emulate RAID0,1 and 5.

How about raid 0+1?

IMO, not scalable enough.

What you described above is RAID 0+1 which mirrors a whole RAID 0 array. RAID 5 will only back up one drive so if more than one drive is lost you're screwed

Only screwed if you lose more than one drive simultaneously (which is unlikely). Of course if your still paranoid ... RAID6

RAID 5 also takes a bit of CPU performance unless you have a good hardware RAID controller.

Aye ... I dont reccomend software RAID_anything