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On Sun, 2009-03-15 at 15:42 +0000, Matthew Macdonald-Wallace wrote: > > 4 disks minimum IMHO, two in each server configured as RAID-1. If you > can afford it (although seeing the budget I suspect not!) 6 disks in > each server, RAID-5 mirrored as RAID-1 (is this RAID-6 or RAID-15? I > can never remember and I don't trust Wikipedia any more!). > RAID 51 I think (build the RAID 5, then mirror it). We did this on one server. RAID 6 is like RAID 5 but with more parity checks stored. Never used it myself. John. -- --------------------------------------------------------------- John Horne, University of Plymouth, UK Tel: +44 (0)1752 587287 E-mail: John.Horne@xxxxxxxxxxxxxx Fax: +44 (0)1752 587001 -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/linux_adm/list-faq.html