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ReadyNas 312 - External storage device is connected but the file system is not recognized
RN312, 6.10.9. I recently got a new 18 TB external USB drive, formatted NTFS. When I first connected it, it was recognized without issue. I started copying data from the existing USB drive to the...
I'm wondering if that failure during a copy caused you to be writing to the OS partition instead of the USB drive (which has it's mount point in the OS partition) and has filled or almost filled your OS partition or at least put something in it such that it can no longer serve as a mount point.
Some users who have come here with OS partition full issues seem to have that as the cause, and the OS partition filling can have a lot of different effects.
I don't see how that could be — the NAS is working fine in all other respects, including both the onboard drives and the other attached USB drive — but if it were, how do I check?
mikebomb wrote:
I don't see how that could be — the NAS is working fine in all other respects, including both the onboard drives and the other attached USB drive — but if it were, how do I check?
We have seen the NAS write to the OS partition before, so it is definitely a possibility.
Download the full log zip, and take a look in volume.log. Scroll down to the df -h section.
=== df -h === Filesystem Size Used Avail Use% Mounted on udev 10M 4.0K 10M 1% /dev /dev/md0 4.0G 1.5G 2.2G 41% //dev/md0 us the OS partition. In this example it's 41% full - a somewhat more than the usual 20-25%, but still ok.
The NAS will report a full OS if it reaches 90%, but I'd rather see it below 50% myself.
On the main problem - if you have a spare disk handy, you could try this:
- power down, and remove your existing disks (labeling by slot)
- insert the spare, and do a factory default with just that one drive in place.
- After a minimal setup, add the suspect USB drive, and see if it behaves normally.
When done testing, power down again, and put the existing disks back (preserving slot order).
I'm sorry for the delayed reply. I tried replying many times but my replies disappeared after they appeared to post.
I downloaded the logs and /dev/md0 is only 21% used. Also, the new drive is shown mounted to /dev/sdc2. Here's the relevant portion of the logs.
=== df -h === Filesystem Size Used Avail Use% Mounted on udev 10M 4.0K 10M 1% /dev /dev/md0 4.0G 753M 2.9G 21% / tmpfs 993M 0 993M 0% /dev/shm tmpfs 993M 3.8M 989M 1% /run tmpfs 497M 4.1M 493M 1% /run/lock tmpfs 993M 0 993M 0% /sys/fs/cgroup /dev/md127 9.1T 5.4T 3.8T 59% /data /dev/md127 9.1T 5.4T 3.8T 59% /home /dev/md127 9.1T 5.4T 3.8T 59% /apps /dev/sdd1 11T 9.9T 1.1T 91% /media/USB_HDD_4 /dev/sdc2 17T 362M 17T 1% /media/USB_HDD_11 === df -i === Filesystem Inodes IUsed IFree IUse% Mounted on udev 253417 420 252997 1% /dev /dev/md0 0 0 0 - / tmpfs 254087 1 254086 1% /dev/shm tmpfs 254087 548 253539 1% /run tmpfs 254087 28 254059 1% /run/lock tmpfs 254087 15 254072 1% /sys/fs/cgroup /dev/md127 0 0 0 - /data /dev/md127 0 0 0 - /home /dev/md127 0 0 0 - /apps /dev/sdd1 0 0 0 - /media/USB_HDD_4 /dev/sdc2 0 0 0 - /media/USB_HDD_11Do you have any other suggestions?
There appears to be two partitions on the disk (the other being sdc1). You might try removing that partition and reformatting the drive - see if that helps.
Also, I suggest researching the drive model, and see if it is an SMR drive. Sustained write speeds can be extremely slow with SMR.
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