18 is legal.
So thinking that way you drain one 70 (an 070 model) then exclude from
RAID, then insert a 140 then include it in RAID then add (and balance!)
to the ASP.
Lather Rinse Repeat. :-)
Once you're down to only the 70GB 074s drain them all, remove them then
add 140s two at a time. (IF you put in THREE or more it will demand you
start a new RAID set not add to the current set.) Since unit 1 (Load
Source) is already a 140 you're in a great spot to do this.
Would I do 18? We do it all the time in the SAS world but it means that
ANY two drive failure is fatal. What I might do is a 17 drive RAID set
with a hot spare.
Why not do RAID6? Well in your case (based ONLY on the tiny I/O numbers
you referenced earlier) I might like that idea. RAID6 would mean you can
lose TWO drives and still keep running. However you will need to STOP
RAID5 and then Start RAID6 to do that. With Hot Spare you just need to
have one UN-configured drive in a Load Source Capable slot to start Hot
On 9/4/2012 3:11 PM, rob@xxxxxxxxx wrote:
*This message was transferred with a trial version of CommuniGate(r) Pro*
How many 140's can I have in one raid set? Is there a reason not to run
an 18 drive raid set of 140's?