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Expansion with X-Raid2, resulting sizes and different reported space on NVX Pro 4 unit / Frontview
Hello, We've got a Pro 4 with 4 x 3TB (WD30EFRX) drives, RAIDiator 4.2.27 and XRAID2 as single disk redundancy (SDR). We've expanded the unit over time (can't quite remember by how much and by whe...
The addition of larger drives give us just a little more space (and time) to play with but I believe the only real solution here is a FR which we'll be working towards over the coming months.
Thank you very much though for all your help and suggestions.
Have a great weekend.
StephenB wrote:
EDIT- mdgm reached a somewhat different conclusion (his post crossed mine).
Well to possibly be a bit clearer on the situation I'd probably need to see some logs. You could well be right about the 1TB snapshot space.
So firstly thank you to you both for taking the time to clarify things. In terms of questions raised;
1. Logs: These were reset earlier on in the year due to an issue with the unit but having had a search of our archives we do have a few saves that were made at different times over the years. There is as you pointed out an overwhelming amount of information to sift through but if there is a specific section of the expansion log that might help reveal the whereabouts of the 'missing 1TB" (M1T) then we'd be happy to dig these out for you*.
*Is there anything in the expansion logs that could compromise security through posting?
2. Warranty; This has expired
3. Snapshots; The unit in FV currently reports 'Additional 10 GB reserved for snapshots'.
StephenB wrote:
If the logs have never been deleted, you can probably trace the history in expansion.log (though there is a lot of clutter in there that you might find confusing).
You were about 1 TB short of what you should have seen, which is more than the usual error.
-Another possibility is that you might have started with 2 TB drives, and that a vertical expansion step might have failed for some reason when you inserted the last 3 TB drive. That would also create a 1 TB discrepancy.
If we rule out the Snapshot theory then the MIT appears to point to a corrupt expansion somwhere along the line. We did indeed move from 2TB through to 3TB at some stage but by the sound of things the only risk-free way of really addressing this would be to carry out a FR.
FWIW, if you are facing a factory reset anyway, you could consider OS 6 - which doesn't have these expansion limits. It is unsupported, but you are likely out of warranty anyway.
Are there any good reads regarding the pros and cons of OS 6 vs Raidiator? We've been pretty happy with Radiator and the way it's worked for us with the exception of the expansion issue
I wouldn't recommend posting logs here, though sharing log snippets is often done. The way Netgear wants to receive logs is via email (the details are in mdgm's signature).
wideef wrote:
If we rule out the Snapshot theory then the MIT appears to point to a corrupt expansion somwhere along the line. We did indeed move from 2TB through to 3TB at some stage but by the sound of things the only risk-free way of really addressing this would be to carry out a FR.
Assuming an earlier expansion did fail - the issue here is that you've expanded again after that, using still larger disks. So the waters are a bit muddied.
wideef wrote:
Are there any good reads regarding the pros and cons of OS 6 vs Raidiator? We've been pretty happy with Radiator and the way it's worked for us with the exception of the expansion issue
There are some posts on the subject, unfortunately the subforum for OS6 on legacy devices on readynas.com wasn't carried over (though the posts are all here).
OS6 uses BTRFS as a file system, not ext. There is a performance hit for writes, but the snapshot feature is more powerful. It also includes built-in Antivirus (which can be turned off). The linux kernel is newer. ReadyCloud currently only works with OS6 (though Remote still works with OS 4).
One thing that is missing is the ability to send a WoL packet at the start of a backup job. Some add-ons for OS4 don't have OS6 app equivalents.
Personally I continue to run 4.2.x on my pro-6. But I am at the point where more expansion would take me over the 16 TiB ceiling. When/if I reach that point, I'll likely switch to OS 6.
The addition of larger drives give us just a little more space (and time) to play with but I believe the only real solution here is a FR which we'll be working towards over the coming months.
Thank you very much though for all your help and suggestions.
Have a great weekend.
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