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Forum Discussion
Turning 2disc JBOD volume into RAID
I currently have 1 JBOD volume including 2 x 3TB disks. Is it possible to change it into RAID without destroying it (e.g. by adding disk). If not is it possible: May I duplicate everything into new v...
kemot wrote:
Does unistalling apps and installing again retein its configuration?
No. The problem here is that the apps are stored on your data volume, so anything that destroys that volume also deletes the apps. Since there are some app-related settings on the OS partition, it is best to delete/reinstall, and not depend on the ReadyNAS application to clean everything up when the volume is deleted.
kemot wrote:
If it is not possible by this method, you explain in other post method of moving apps by ssh. Would it be possible in this case?
I can reduce total data storage to 3TB.
Sandshark has tested this with ssh, not me. Hopefully he will chime in. I don't think he's tested ssh with a jbod volume that spans two disks though.
Note you need to get below about 90% of 3 TB - that is about 2.4 TiB as reported in whe NAS web UI. That's why I suggested backing up half your data.
My adventure in moving apps to another volume can be found here: How-to-save-your-apps-when-destroying-your-main-volume-OS6 . Note that my experiment assumed that all configuration is either in the apps folder or on the OS partition, which should be the case but I can't verify for Resilio.
Multiple drives in a single JBOD are a configuration I've not played with.
I suspect (perhaps StephenB can verify) that it is two single-drive RAID1 MDADM volumes (which sounds odd, but is possible) with a BRTFS file system spanning them both. If it is, then it's possible via SSH to shrink the BTRFS volume down to a single drive once some of the data has been moved off. But I'd have to test it to give the exact steps, and don't currently have the time. It would be quite an undertaking, and I wonder if saving your app configuration is really worth jumping through all the hoops. Here are my adventures in shrinking a volume to remove a drive: Reducing-RAID-size-removing-drives-WITHOUT-DATA-LOSS-is-possible , but it is for a different configuration than yours.
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