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ReadyNAS Pro Biz Edition upgrade from 6X2TB to ?
I have a 2009 ReadyNAS Pro Biz Edition that has six 2TB drives and it is running RAIDiator 4.2.22. I haven't had it on for awhile and quit using it because it filled up. I have a couple 3TB drives ...
linkup1 wrote:
Still not getting the math. at 14TB I already subtracted a full 4TB drive for redundancy. Then what is the additional 1.3TB being taken away?
14 TB and 12.7 TiB are the same amount of actual space, just reported using different units. Drive manufacturers always use TB. The NAS uses TiB, but calls it TB (as does Windows).
1 TB = 1000*1000*1000*1000 bytes
1 TiB = 1024*1024*1024*1024 bytes
To convert 14 TB to TiB, the formula is
14*(1000/1024)*(1000/1024)*(1000/1024)*(1000/1024) = 12.7 TiB.
There are similar mismatches for GB /GiB and MB/MiB.
>Yes it does! With 2x2TB+2x3TB+2x4TB you will indeed have 14 TB capacity. That works out to 12.7 TiB.
Still not getting the math. at 14TB I already subtracted a full 4TB drive for redundancy. Then what is the additional 1.3TB being taken away?
I Googled RAID5 calculation and found a site that does nothing but calculate space...entered 6ea 3TB drives which would be 18-3=15 with what they called RAID5 Parity, i.e.
Capacity 15000 GB
Speed Gain - 5x read speed, no write speed gain
Fault tolerance - 5x read speed, no write speed gain
Is the 1.3TB based on the fact hat 1TB doesn't equal 1TB of useable space?
linkup1 wrote:
Still not getting the math. at 14TB I already subtracted a full 4TB drive for redundancy. Then what is the additional 1.3TB being taken away?
14 TB and 12.7 TiB are the same amount of actual space, just reported using different units. Drive manufacturers always use TB. The NAS uses TiB, but calls it TB (as does Windows).
1 TB = 1000*1000*1000*1000 bytes
1 TiB = 1024*1024*1024*1024 bytes
To convert 14 TB to TiB, the formula is
14*(1000/1024)*(1000/1024)*(1000/1024)*(1000/1024) = 12.7 TiB.
There are similar mismatches for GB /GiB and MB/MiB.
Thanks again for everything sir....as long as I haven't lost everything. This whole thing got convoluted as they tend to do. Thanks for your excellent level of support throughout!
Lew
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