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11TB (2TB + 2TB + 3TB + 4TB) results in 7.24TB in RAID0??? where does the space go?
Hi,
I just installed a new 4TB disk into my ReadNAS RN104 which already contained a 2 x 2TB + 3TB. When I check the net disk capacity it's 2 x 1.8, 2.4 and the new disk 3.6, total 9...
marcelser wrote:
I played around more with the ReadyNAS calculator more and it turns out that mixed disks in RAID0 mode is not handled by any ReadyNAS in a useful way.
I believe that with the 6.9.3 you can manually create RAID groups using the extra space on the larger disks, and then concatenate them to the existing volume. Though it's not as automated as it might be, you should still be able to do it.
The guide here might help - https://www.netgear.com/images/support/WP_ReadyNAS%20FlexRAID%20Optimization%20Guide_18May17.pdf
I played around more with the ReadyNAS calculator more and it turns out that mixed disks in RAID0 mode is not handled by any ReadyNAS in a useful way. Because all the installed disks just use as much space as the smallest disk. So means my setup of "2 x 2TB, 1 x 3TB and 1 x 4TB" effectively is "4 x 2TB" as 2TB is the smallest disk size and 1TB of the 3 TB disk and 2TB of the 4TB disk ist just wasted!
That you can do much better on this shows synology. They don't have such limitations as their calculator shows:
https://www.synology.com/en-global/support/RAID_calculator
All disks are used to their full extent no matter what size in a RAID0 striped setup.
I don't have think twice but replace the crappy ReadyNAS device with a decent NAS. Actually the RN104 has been my second ReadyNAS device after the NV+ but both have disappointed me after some time (mostly because of disk, size or RAID limitations). Thats why I already replaced my main NAS by a Synology. Seems now I also have to switch the backup NAS to something decent. So my advice is: If you plan on use a striped RAID0 setup with mixed disk sizes, stay away from ReadyNAS unless you want to waste space. This raid mode has a very bad implementation in all of the ReadyNAS devices as it seems.
marcelser wrote:
I played around more with the ReadyNAS calculator more and it turns out that mixed disks in RAID0 mode is not handled by any ReadyNAS in a useful way.
I believe that with the 6.9.3 you can manually create RAID groups using the extra space on the larger disks, and then concatenate them to the existing volume. Though it's not as automated as it might be, you should still be able to do it.
The guide here might help - https://www.netgear.com/images/support/WP_ReadyNAS%20FlexRAID%20Optimization%20Guide_18May17.pdf
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