Long estimated time to sync additional drive in NAS

h0vy

The estimated time is still showing +100 hours to sync drives after about 20 minutes of running; I have less than 1.5TB of data to sync. I am in the process of adding an additional drive in RAID1 in nas326. That timing doesn't sound right - I am not doing anything else on the NAS.

I went to the manage storage option> volume > edit volume > change raid, which was the only option avail, all the rest were grayed out.

Mijzelf

I have less than 1.5TB of data to sync

When expanding a volume from single disk to raid1, or when resyncing a degraded raid1, this isn't relevant. The raid volume is below the filesystem, so it doesn't 'know' about data and free space. It just sees the raw disk.

So the disk size is the only relevant measure. The NAS should be able to sync 50-100MB/sec, which is 180-360GB/hour. 100 hours should be 18-36TB, which is unlikely.

Did you add an SMR disk?

h0vy

https://community.zyxel.com/en/discussion/comment/82025#Comment_82025

Ok makes sense.

The new disc is a seagate ironwolf st8000vn004; p/n 3cp101-500 manufactured JUNE 2023 - i thought that was CMR.

the current old drive is WDC WD80EFZZ-68BTXn0

Mijzelf

Hm. According to the specs I found both are CMR. Although it doesn't matter for the source disk, AFAIK reading on SMR is as fast as reading on CMR.

Do you have shell access? 'cat /proc/mdstat' should tell something about the sync process, and 'dmesg' about errors in the process.