RAID1 you lose 50% of disk space RAID5 you lose 1/n (n = number of drives) of disk space. (33% for 3 drives, 25% for 4 drives, 10% for 10 drives, 5% for 20 drives etc.)
The larger the number of spindles in your RAID5 array, the less space you lose. RAID1 performs better though. Both arrays can lose a single drive without failure. So you need to weigh up whether you need perf or space. Chees Ken From: Holstrom, Don [mailto:[email protected]] Sent: Monday, 11 April 2011 10:07 PM To: NT System Admin Issues Subject: RE: Opinion on rebuilding Raid 5 With the huge sizes hard drives can reach, is RAID5 still better than, say, mirrored drives? Or some other way. Our consultants want RAID5 for every server... <huge snippage> ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin
