On Apr 12, 2011, at 1:54 PM, Lamar Owen wrote: > On Tuesday, April 12, 2011 02:51:45 PM John R Pierce wrote: >> On 04/12/11 6:02 AM, Marian Marinov wrote: >>> >>> Yes... but with such RAID10 solution you get only half of the disk >>> space... so >>> from 10 2TB drives you get only 10TB instead of 16TB with RAID6. >> >> those disks are $100 each. whats your data worth? > > Where can I get an enterprise-class 2TB drive for $100? This is a good point. The cheapies are so called green as they spin down often which is not what you want in a RAID setup. While I've been able to tweak this in OSX, I haven't yet tried to see what to do in Linux or Winblowz which I will eventually do as some turd nugget bought a bunch of these for pro use. > Commodity SATA isn't enterprise-class. SAS is; FC is, SCSI is. A > 500GB FC drive with EMC firmware new is going to set you back ten > times that, at least. What's youre data worth indeed, putting it on > commodity disk.... :-) > >> in this case, the OP is talking about a 40TB array, so thats a TWENTY >> TWO drive raid. NOONE I know in the storage business will use larger >> than a 8 or 10 drive raid set. > > EMC allows RAID groups up to 16 drives on Clariion storage. Yea, as does BlueArc, unsure of the rest but agreed. - aurf