I have two of this model, one purchased in 11-16-16 and one 9-5-18. Both running Firmware 6.9.4. Both were turned off for 2 months and restarted 12-4-18. Within a few hours of restarting, both (and an RN102) loaded Hotfix 1. Within 2 days of this hotfix addition, the older unit had a volume error and went 'read only'. I rebuilt the system and so far, seems to be working. This morning I found the new one went into error / read only mode. I've not had this problem berfore; the 102 system seems to be holding. If this is a recurring theme I'll buy another brand.
Re: RN21400 HAVING VOLUMN ERROR AND GOING READ ONLY
The Btrfs's are associated with a device identified as md126. Is there some way to trace which drive that identifies or is that the whole system. I've been preoccupied with other efforts so am just getting back to identify the drive(s).
The Btrfs's are associated with a device identified as md126.
That's a virtual disk drive (that is, a RAID group). You can look at disk_info.log and mdstat.log so see how it correlates to physical disks. Disk_info will also give you the SMART statistics - which you should certainly review.
Do you have multiple volumes, or only one?
If you are running XRAID, then its a RAID group that was created when you vertically expanded the NAS storage (upgrading to larger disks). For instance, if you started with 4x2TB and expanded two disks to 4 TB, then md126 would use the 2 TB of new space on the two upgraded disks. The file system would span both md127 and md126, so the errors would affect the file system generally.
Re: RN21400 HAVING VOLUMN ERROR AND GOING READ ONLY
Here is the mdstat log. The listing seems to indicate that while I thought everything was Raid 5, there are also a raid 1 segment and a raid 6 chunk. And you are correct, I increased size a year or so ago and have both a 126 and 127. If I take out a disk, run it through a check and if OK, replace it, will the system rebuild itself with that disk?
