Block size for a stripe array?

[canadian_divx]

i am not sure what block size i should use for this array. i have 2 160gb drives that i am going to be raiding togther. the block size options that i have are 2mb, 1mb, 512k, 256k, 128k, 64k, 32k, 16k

i am thinking 512K. but not too sure

anyone got any ideas?

 

[LordOfLA]

32k or 64k - try 64k

 

[canadian_divx]

ok cool, its now set to 64.

but if i may know. why 64? why not less or more? i dont totaly understand this block size thing too well

 

[LordOfLA]

I have no idea. I was just reading aout striping on either the freebsd or dragonflybsd mailing list and they said that anything other than 32k or 64k was inefficient and slow..

 

[Zedric]

It depends on the file size of the files stored on the drive. Small files go faster with small block size and large files with large block size. So for instance, a web server shoud have small blocks (many small html and image files). If it's the drive you store movies on (and only that size files) you might consider a larger block size. But 64k is a good allround size.


Or maybe I've confused the whole thing since this is about RAID... :/