Sign in with
Sign up | Sign in
Your question

RAID with single physical drive?

Last response: in Storage
Share
April 18, 2010 12:38:43 PM

Hello,
Want to know if it's been tried before I head down a dark deadend. Can a single physical drive be divided into two identical partitions, then use the two partitions to create a RAID 0 array? May have just given away that I'm a newb to raid, but it came to me in sleep deprived state, and can't stop wondering! Any insights would be helpful and thank you in advance
a c 127 G Storage
April 18, 2010 1:00:26 PM

Yes you can, on Linux and BSD. But it would be very low performance as you force the HDD to seek from one partition to the second partition; so even sequential I/O would have the low speeds of random I/O on HDDs.

It could be done on SSDs however, though i doubt it would increase speed by any degree.
m
0
l
April 18, 2010 1:04:01 PM

Oh yeah, forgot about the head....Drat, seemed like such a good idea this morning... Thanks for waking me up!
m
0
l
a c 127 G Storage
April 18, 2010 1:42:11 PM

SSDs use RAID0 internally though, the Intel controller has 10 separate flash channels to use in parallel (at the same time). A HDD can only process one I/O at a time.
m
0
l
!