> On Tuesday 12 April 2011 15:34:21 Torres, Giovanni (NIH/NINDS) [C] wrote: >> On Apr 12, 2011, at 3:23 AM, Matthew Feinberg wrote: >> >> ext4 does not seem to be fully baked in 5.6 yet. parted 1.8 does not >> support creating ext4 (strange) >> >> The CentOS homepage states that ext4 is now a fully supported filesystem >> in >> 5.6. _______________________________________________ >> CentOS mailing list >> CentOS at centos.org >> http://lists.centos.org/mailman/listinfo/centos > > Steve, > I'm managing machines with 30TB of storage for more then two years. And > with > good reporting and reaction we have never had to run fsck. That's not the issue. The issue is rebuild-time. The longer it takes, the more likely is another failure in the array. With RAID6, this does not instantly kill your RAID, as with RAID5 - but I assume it will further decrease overall-performance and the rebuild-time will go up significantly - adding the the risk. Thus, it's generally advisable to do just use RAID10 (in this case, a thin-striped array of RAID1-arrays).