Shrink array running since over two days?

[hawihoney]

I want to throw out a disk from the array and used that documentation:

 

https://wiki.unraid.net/Shrink_array

 

I'm using the save method (parity always valid) and the User Script mentioned to zero a 3 TB disk. Turbo write was activated prior start.

 

This process is running since 51 hours now and there's no end in sight. The array usually writes at 50 MB/s with dual parity. Zeroing "runs" at 10 MB/s. What's wrong with that process? Why isn't it writing/zeroing at similar speed? Why is writing zeros to a disk over 5 times slower than writing random bytes of file content?

 

Any insights are highly appreciated.

 

Many thanks in advance.

 

[JorgeB]

There have been various reports of the script being very slow with current releases, you can always run it manually.

[hawihoney]

The script issues the same command exactly. You run in maintenance mode, I'm in production. Hmm? Now i'm confused.

 

Something wrong with my array?

 

Is there a way to find out at what position dd is working?

 

Edited November 1, 2020 by hawihoney

[JorgeB]

20 hours ago, hawihoney said:

The script issues the same command exactly

Yes, but for some reason it's known to be slow with current releases, never investigated further and the scrip author as been MIA for years.

[hawihoney]

Thanks. After 70 hours I had to hard-reset the server because I was not able to force stop the script nor the DD executable. I gave up on that project (tried to remove and zero two empty disks from the array to build a second cache pool in the future).