Consider this - a rebuild of 1.5-2 TB HDD in raid5/6 array can easily take up to few days to complete. At that moment your storage at that node will not perform well. I read a week ago very good article with research of this area, only thing it's in russian, but it mentions a few english sources too. Maybe google translate will help. Here's the original link: http://habrahabr.ru/blogs/hardware/78311/ Here's the google translate version: http://translate.google.com/translate?js=y&prev=_t&hl=en&ie=UTF-8&layout=1&eotf=1&u=http%3A%2F%2Fhabrahabr.ru%2Fblogs%2Fhardware%2F78311%2F&sl=ru&tl=en (looks quite neet by the way) 2010/1/5 Liam Slusser <lslusser at gmail.com>: > Larry & All, > > I would much rather rebuild a bad drive with a raid controller then > have to wait for Gluster to do it. ?With a large number of files doing > a ls -aglR can take weeks. ?Also you don't NEED enterprise drives with > a raid controller, i use desktop 1.5tb Seagate drives which happy as a > clam on a 3ware SAS card under a SAS expander. > > liam > >