Hey, thanks for all the responses. This is going to be DAS. Thanks! Naresh On Mon, May 26, 2008 at 3:04 PM, Nikolay Ulyanitsky <lystor at lystor.org.ua> wrote: > On Mon, 2008-05-26 at 14:40 -0400, Mag Gam wrote: > > I have 12 750GB drive appliance from HP. I was wondering what is the > > best disk configuration? I suppose a large RAID5 would be bad since > > rebuilding would take too long. What do you recommend? > > I prefer RAID10. > You can create 1 RAID-10 device with 12 * 750 Gb / 2 = 4.5 Tb size. > > Also you can create 3 RAID-10 devices with 4 HDD per device. Each MD > device's size will be 3 * 750 / 2 = 1.125 Tb. > > > http://wiki.linuxquestions.org/wiki/RAID#RAID_10:_Striping_across_Mirror_sets: > "RAID 10 provides better performance than simple RAID 1 along with the > redundancy that simple RAID 0 lacks. It requires at least four drives to > implement and provides usable space equal to S*N/2 where 'S' is the size > of the smallest of the hard drives being used and 'N' is the number of > disks in the array. So, if I form a RAID 10 of four 10 GB disks, the > usable size of the array is 20 GB. > > RAID 0+1 and RAID 10 are very similar but, by most measures of both > performance and redundancy, RAID 10 is considered to be preferable. > > A RAID 10 can withstand the failure of a single drive (or multiple > drives, so long as they are NOT in the same mirror set)." > > > -- > Nikolay Ulyanitsky <lystor at lystor.org.ua> > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20080526/e06b495b/attachment-0005.html>