Help with Slow Parity Sync


Go to solution Solved by JorgeB,

Recommended Posts

Hi everyone,

 

I bought recently a new drive with 8TB to use as parity (until now, my unraid server had no parity)

Well, I mounted it, and started the parity sync.

 

The speed of parity sync is, in my opinion, really bad, around 35MB/Sec, which will take days to finish.

 

I've read some posts and did some changes (disabled VM manager and docker, and assure that cache write was turned on).

 

Now, when I start the parity sync, it goes fine (around 170MB/Sec) until aprox. 8%.

At this moment, the speed drops to 35MB/Sec.

 

I've identified that at the beginning, the disks are rarely written.

When the speed drops, the disk 2 (sdd) is written almost every second.

 

You can find attached the diagnostics, and a print screen of my array.

 

Anyone can give me some hints on how to speed up things?

unraid_array.png

weebuzserver-diagnostics-20230315-1122.zip

Link to comment

Thank you JorgeB.

I will try to return this disk and replace it by a Toshiba N300 also with 8TB (Serial No. HDWG480UZSVA).

I think that this one is CMR.

 

Once I receive the disk and test it, I will update the thread!
 

Link to comment

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.