SSD's in Raid 0 - Align??

[sequoia464]

I have a couple of sets of SSD's in Raid 0. The first set (C drive) was aligned when i put W7 on it. The others I just set as a raided pair in the bios.

It just dawned on me thay the second and third sets (D and E drives) did not get aligned. Is this necessary??

 

[nanaki333]

what do you mean? if you mean what i think, then an SSD's GC will keep your drive clean and running optimal.

 

[sequoia464]

I am a bit hazy on exactly why a SSD needs to be aligned, but supposedly they need to be. I think it has something to do with the sectors being aligned correctly. Windows 7 creates a 100 mb reserve automatically that, if I understand correctly, sets up this condition.

I don't really understand why a SSD needs to be aligned, or what it actually does, but I have read, quite often, that this is important in setting up a SSD correctly.

Perhaps someone that knows can describe to you exactly what aligning is and what it does.

 

[stevech]

Alignment as I understand is because to support newer large disks, Microsoft changed the allocation unit size such that a sector per se is 4KB now (larger). Not sure how this relates to Linux.

 

[VirtualLarry]

Alignment is important for SSDs, to increase their lifespan. If you don't align, they may wear out prematurely.

 

[groberts101]

sequioa, W7 automatically aligns any partition created in disk mgmt to 1024 so it's a non-issue.