user

Interesting. I also see a big difference using bs=1M root@Tower:/mnt# dd if=/dev/zero of=/mnt/user/test/test1 bs=1M count=10240 10240+0 records in 10240+0 records out 10737418240 bytes (11 GB, 10 GiB) copied, 58.5442 s, 183 MB/s root@Tower:/mnt# dd if=/dev/zero of=/mnt/disk1/test/test2 bs=1M count=10240 10240+0 records in 10240+0 records out 10737418240 bytes (11 GB, 10 GiB) copied, 60.0663 s, 179 MB/s What is the block size used by Unraid?

Thanks!

Would the parity still work when using the /mnt/diskX mount or do I need to copy files through the /mnt/user share for the parity to work?

Ok I just tested with DirectIO writing to /mnt/user. Without DirectIO I was getting 52.4 MB/s. With DirectIO I am getting 111 MB/s. These numbers look proportional to yours. Is everyone using DirectIO? Also, are there any downsides to writing directly to a disk when using a single disk?

What write speed do you see when writing to the array under /mnt/user?

Do you see speeds higher than 52.4 MB/s when writing to user?

There should be a logical explanation. I just want to know if other people on 6.7 see the same speeds. For example, what write speed do you see when running the following command from the Unraid terminal? dd if=/dev/zero of=/mnt/user/appdata/test1 bs=1024 count=10240000

I restarted the system, re-ran the tests and got the same results. Also I am on Unraid version 6.7.2.

Thanks for the reply Squid. I have a Xeon quad core CPU. When doing the tests there is no other activity in the array or system. When copying data to /mnt/user I see the shfs process using 83.7% CPU, but the overall load in the system is less than 15%. I'm wondering if the shfs mount is the bottleneck. 3014 root 20 0 347208 2772 908 S 83.7 0.0 9:13.08 shfs Thanks!

Hello. I am new to Unraid. I have a question about write speeds to different mounts. Right now I am doing some performance tests to characterize my system. My array only has 1 disk (10TB WD Red) and no parity disk. I am using an xfs encrypted filesystem. I am noticing a big difference in write speeds writing to /mnt/disk1 vs writing to /mnt/user. When writing to /mnt/disk1 using the following command from the Unraid terminal I get speeds of 171 MB/s root@Tower:~# dd if=/dev/zero of=/mnt/disk1/test/test1 bs=1024 count=10240000 10240000+0 records in 10240000+0 records out 10485760000 bytes (10 GB, 9.8 GiB) copied, 61.2586 s, 171 MB/s When writing to /mnt/user using the following command from the Unraid terminal I get speeds of 52.4 MB/s root@Tower:~# dd if=/dev/zero of=/mnt/user/test/test2 bs=1024 count=10240000 10240000+0 records in 10240000+0 records out 10485760000 bytes (10 GB, 9.8 GiB) copied, 199.97 s, 52.4 MB/s I've run the test multiple times with the same results. I also get the same results when using reconstruct write. I have a few questions about this. 1. Is this expected? 2. Is /mnt/user slower because it's using shfs? 3. If I want to transfer data from other Unassigned devices, can I transfer it to /mnt/disk1 or should I always go through /mnt/user? 4. When I start using a parity drive, would the parity be computed even if I write directly to /mnt/disk1? Thanks in advance!