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Hope is not a plan... #19636384 [CLOSED]
Hello, I will try my best to remove all emotion from this post/question/plea for help :D Purchased a new ReadyNas NV+ mid-2007 and until mid-2012 it ran without an issue (save replacing one drive...
musicfreak wrote: X-Raid 4 Disks Redundant - EXCELLENT NEWS!!!
My new question is this - There is no data on the NAS with the exception of the OS. I have 4 1TB disks installed. Each disk has 927 GB allocated. The display on the front of the NAS unit shows 2.6/2.6 TB available. Should it not read 3.7/3.7 TB available?
Your NAS is using X-RAID (essentially an expandable RAID 5 volume).
In X-RAID (or RAID 5), the NAS reserves 1 disk for redundancy and uses the remaining disks for data storage. Of course, drive manufacturers use "marketing terms" for capacity (where 1 k = 1,000 bytes, rather than 1,024 bytes) to give the drive the appearance of more space. A 1 TB drive really only has 927 GB of capacity (using 1024 KB blocks). Multiply by 3 to get overall capacity (remember, the 4th drive is for parity/redundancy) and you end up with about 2.8 TB. Subtract OS, overhead and snapshot space and you get pretty much what Frontview is reporting:
http://www.readynas.com/kb/faq/boot/why ... n_expected
-Dave
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