On Wednesday, April 13, 2011 04:54:01 AM Ross Walker wrote: > On Apr 12, 2011, at 8:53 AM, Rudi Ahlers <Rudi@xxxxxxxxxxx> wrote: ... > > As matter of interest, what hardware do you use? i.e. what CPU's, size > > of RAM and RAID cards do you use on this size system? > > > > Everyone always recommends to use smaller RAID arrays than one big fat > > one. So, I'm interested to know what you use, and how effective it > > works. i.e. if that 30TB was actively used by many hosts how does it > > cope? Or is it just archival storage? > > I would never create a RAID5/6 greater then 8 disks. Usually I create a 6 > or 7 disk RAID5 which means I can fit 2 in a 15 disk enclosure and have a > hot spare and stripe them. Personal preference here, personal preference there. Here's a datapoint: We run >PB of data on 12 drive raid6 using sata (no hot spare). Are we happy with that config: yes, would it be faster to use 15K sas in raid10: yes *shrug* /Peter > The more RAID5 sets you have the greater the write IOPS you can achieve. > > Though for max IOPS nothing beats RAID10. > > -Ross
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