Hi-

    I upgraded the parity drive and one data drive in my current setup from 2->4 TB.  I took the old 2 TB drives and built another unraid server.

 

I Deleted all the old files and shares. 

 

I then  started a parity check and it is very slow:

2 TB

Current position: 3.13 GB (0%)

Estimated speed: 6.06 MB/sec

Estimated finish: 5494 minutes

Sync errors corrected: 557833

 

Should I have pre-cleared these drives to avoid this?

 

Thanks,

-12vman

Pre-Clearing is not relevant to parity checking (except as a confidence check of the drives involved).

 

The slow speed almost certainly indicates some sort of problem accessing at least one of the disks.  A SMART report and a syslog may give more clues as to whether the problem is likely to be a real problem with a disk, or something else like a cabling or power issue.

The Parity drive in this machine would no longer be valid as it now only stores parity for a single 2TB drive.   

 

I did test a file copy of a 12gb MKV, it finished in 4m30s.

 

I looked at the syslog - nothing out of the ordinary.

Ihad the same type of problem and no one came to my rescue.

Here is what i did and it worked.

Go to Unraid Main and make a list your drive locations

Now stop the array.

Go to Tools in Unraid Main and choose New Config. Follow the directions

Go back o the main page and assign your discs to wherever you want them.

It probably should take just a few hours to rebuild the parity drive

With 11 drives (8 empty) and a 4tb parity mine took 6 hours

I pre-cleared both the drives and started over.  Brought the server up online, built parity and did a check - all is good now.