[[6.7.0-rc2] Reading all disks when writing to a single one]

Also using XFS filesystem and using default tunables.

Also running xfs on cache

[[6.7.0-rc2] Reading all disks when writing to a single one]

It takes a few minutes copying before I get disk spinup or read requests to.

 

If I copying a large file everything is good for around 15gb (around same time my transfer speed goes from 119MB/s to around 70MB/s) then after that I get reads from all disks.

[[6.7.0-rc2] Reading all disks when writing to a single one]

On 1/28/2019 at 10:20 PM, limetech said:

I don't know what this means, please rephrase.

I think it means:

When Writing a file to a single disk you get some read request from all the other disks, even the boot flash drive.

 

This is a problem because it wakes up all disks in the system (start spinning), on unraid 6.6.6 you dont get these reads from other disks, it only keeps it to the disk you write to plus parity letting the rest of the disks stopped (not spinning).

 

So in practice all my disks is now spinning all the time, and before it was mosty one or two disks spinning (none at night or work time).

Running some dockers and these makes some small read/writes to cache disk (ssd) and that keeps the rest of my disks from going to sleep because unraid now reads from all disks when you write to just one.

[[6.7.0-rc2] Reading all disks when writing to a single one]

10 minutes ago, limetech said:

Before I deep dive into this issue... maybe something is trying to read disk temperatures or other SMART info, which will spin up most HDD's, do you have a browser window open on the Dashboard?

 

Second, are these writes to disk shares or user shares?

Only having the Main page open to look at read/write values.

 

I dont think there are anything else trying to read disk info.

and I get reads even on boot flash drive.. This seems to happen at the same time the write speed goes down when writing.  And you can see my share is a user share that is just permitted to use disk 3. 

 

After going back to 6.6.6 all these problems is gone and my unused disks can be spin downed

[[6.7.0-rc2] Reading all disks when writing to a single one]

Update:

Tried to rollback to 6.7.0rc1 same problem, so it seems this was introduced in the rc1

Went back to 6.6.6 and now the problem is gone.

[[6.7.0-rc2] Reading all disks when writing to a single one]

After more testing turning turbo write on and off did nothing.

Seems to be exactly the same problems as op. When writing to my array I get some reads from the rest of my disks resulting in all disks spinning up.

 

The reads from the other disks seems to begin at the same time the transfer speed drops 10-15GB into the transfer. (most of the times)

 

Seems to happen when I write to cache only share also 10-15GB into the transfer. (gets reads from all drives except parity this time)

 

Also getting reads from flash device just like op said.

 

[[6.7.0-rc2] Reading all disks when writing to a single one]

I'm shure there is writing to cashe (SSD) but this should not spin up other disks. And this worked fine on 6.6.6 and 6.7.0rc1.

Only noticed it after updating to rc2 that  all my disks is spinning when normal behavior is none at night and 1-2 disks during daytime.

 

Will try to change turbo write and some other settings to see if that helps

[[6.7.0-rc2] Reading all disks when writing to a single one]

12 minutes ago, trurl said:

You might try turning on turbo write and then turning it back off.

Turbo write is "Tunable (md_write_mehtod)" right? 

And I'm only reading from disk no writhing. Still all disks spins up (maybe some read/write to cache but this should not spin up disks)

[[6.7.0-rc2] Reading all disks when writing to a single one]

@trurl

No

[[6.7.0-rc2] Reading all disks when writing to a single one]

no turbo write here. same settings as on 6.6.6 and 6.7.0rc1 

Tunable (md_write_mehtod) is set to auto

 

Tried to manual spin down all disks and after a few minutes all disks are now spinning.

Only activity is watching a tv show from one of the disks 

[[6.7.0-rc2] Reading all disks when writing to a single one]

I'm also noticing some unusual disk activity

Updated from rc1 to rc2 and now all my disks is spinning mostly all the time. before it was normal with one or two disk spinning. 

Disks are set to spin down after 3 hours.  

[[6.5.2] Unraid reports wrong on max installable memory]

7 minutes ago, eschultz said:

What is the output from this command? (from your console or ssh session):

dmidecode -qt16

 

root@Tower:~# dmidecode -qt16                                                
Physical Memory Array                                                        
        Location: System Board Or Motherboard                                
        Use: System Memory                                                   
        Error Correction Type: None                                          
        Maximum Capacity: 256 GB                                             
        Number Of Devices: 4