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Changing from Flex-RAID to X-RAID
I was casually looking at the volumes tab of my ReadyNAS admin page. And so I noticed that the X-RAID button was not lit. I specifically recall getting a ReadyNAS specifically for X-RAID capabilitie...
Your logs show a 4x2TB RAID-5 layer and a 3x2TB RAID-5 layer. Replace the 3TB disk with a 4TB disk and you should get some more expansion.
Sadly they are not the same size.
It is currently RAID-5 with Flex-RAID, like so in this order from left to right in the bays:
WDC WD30EZRX-00D8PB0 3TB
WDC WD40EFRX-68WT0N0 4TB
WDC WD40EFRX-68WT0N0 4TB
WDC WD40EFRX-68WT0N0 4TB
Turning X-RAID on or off does NOT affect the data in the volume.
If you're running Flex-RAID with mixed capacity HDDs, then you are limited by the smallest HDD in your current volume.
The thread from 2009 is about X-RAID/Flex-RAID on RAIDiator 4/5.
Now, on ReadyNAS OS 6, you can switch between X-RAID and Flex-RAID (seemingly turning X-RAID on or off by the look of the GUI) without the need to Factory Default (you can't turn X-RAID back on if you don't have a "compatible" volume).
If you have a single RAID5, you can indeed turn on X-RAID and it will expand your volume by almost 2TB (a bit less if you substract overhead, etc.).
Also, please, if you're unsecure, have an external backup of your data! A RAID providing redundancy does NOT replace an external backup ;)
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