I would say that you should be using raidz2, given that you are using large 1.5TB drives.
I think the argument goes that, with raidz, if one drive fails,then to reconstruct the failed drive, you need to read all the data from the other drives. This puts a high stress on the system, for a long & sustained period and could expose another latent problem in another drive, and thus cause lost of all data. By having two parity drives it's much safer. I did a quick google to find a reference to back this up, but I could not find a zfs specific reference. But here are a couple of good RAID-DP links from NetApp that make a case: http://blogs.netapp.com/dave/2006/05/why_double_prot.html http://www.usenix.org/publications/library/proceedings/fast04/tech/corbett/corbett.pdf Regards Nigel Smith -- This message posted from opensolaris.org _______________________________________________ storage-discuss mailing list storage-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/storage-discuss
