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Forum Discussion
Ultra Nas 6 with 3 WD 3TB drives only shows 5.5TB
Hello,
I just got an Ultra Nas 6 to replace my NV+ and have equipped it with 3 WD red 3tb drives, however, rather than somewhere near 9TB available, it only shows 5.5TB available....
That seems like quite a bit of overhead...
Did I miss something? I am reading the available TB from the readynas admin home page. No data has been placed on the unit yet.
Todd
I just got an Ultra Nas 6 to replace my NV+ and have equipped it with 3 WD red 3tb drives, however, rather than somewhere near 9TB available, it only shows 5.5TB available....
That seems like quite a bit of overhead...
Did I miss something? I am reading the available TB from the readynas admin home page. No data has been placed on the unit yet.
Todd
4 Replies
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- Take a look at the X-RAID Volume Size Calculator (see link in my sig).
That is the volume capacity to be expected with 3x3TB disks installed. If any one disk fails your data remains intact. - Your reply makes sense. Thanks! Interesting that I ended up with about the same usable space with 4 2tb drives in my NV+ and 3 3tb drives in the Ultra 6.
So, given the formula, if you were to fill all 6 drives in the Ultra 6, what drive size would give you the most useable space?
That is expected, you can test it with the calculator. To approximate the space, take away the largest drive and sum the rest (3x2TB=6TB, 2x3TB=6TB).Rubatoguy wrote: Your reply makes sense. Thanks! Interesting that I ended up with about the same usable space with 4 2tb drives in my NV+ and 3 3tb drives in the Ultra 6.
Well, you could of course try the calculator... :shock: 6x3TB-> about 15 TB, 6x2TB-> about 10 TB.Rubatoguy wrote: So, given the formula, if you were to fill all 6 drives in the Ultra 6, what drive size would give you the most useable space? - If you were to install 6x3TB drives I would recommend using dual-redundancy (if any two disks data remains intact) rather than single-redundancy. Though backups are still required (of course), the extra protection that RAID-6 offers is well worth it.
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