Jump to content
  • 0

File Duplication Consistency


DotJun

Question

6 answers to this question

Recommended Posts

  • 0

That may depend on your automatic balancing settings.  If you have it set to run once every 24 hours, it should not poll the drives to balance (or to check duplication).  If there's no activity on the pool drives, then it shouldn't be reading them outside of whatever schedule you have set and they should continue to sleep soundly.

I can't say mine is the definitive word on this however - just logical speculation.  Christopher and Alex know far better how Metadata duplication checking works, and when it runs.

Are yours waking up with duplication off and no drive activity happening?  That can also be Scanner waking them up (if it's installed) since it likes to poll SMART regularly.

Link to comment
Share on other sites

  • 0
3 minutes ago, Jaga said:

That may depend on your automatic balancing settings.  If you have it set to run once every 24 hours, it should not poll the drives to balance (or to check duplication).  If there's no activity on the pool drives, then it shouldn't be reading them outside of whatever schedule you have set and they should continue to sleep soundly.

I can't say mine is the definitive word on this however - just logical speculation.  Christopher and Alex know far better how Metadata duplication checking works, and when it runs.

Are yours waking up with duplication off and no drive activity happening?  That can also be Scanner waking them up (if it's installed) since it likes to poll SMART regularly.

Yes my drives keep waking up often and I am trying to track down the culprit.

I do have scanner, but I thought that it doesn't poll SMART if the drive is asleep?

Duplication checks are controlled by balancing?

Link to comment
Share on other sites

  • 0
2 minutes ago, DotJun said:

Yes my drives keep waking up often and I am trying to track down the culprit.

I do have scanner, but I thought that it doesn't poll SMART if the drive is asleep?

Scanner will poll SMART on all connected drives on a pretty high frequency, unless you restrict it with a schedule and/or turn off it's ability to wake a drive to poll it.  I highly suspect it is Scanner that's waking the drives, and not DrivePool.

I'm unsure of duplication checks on Metadata, or when they are scheduled on a pool without duplication set otherwise.  I don't think it's the culprit here.

Try disabling "Wake up to scan" in Scanner general settings, and restrict it to a work window (mine is 5am to 11am).  Then change the S.M.A.R.T. settings and check "Do not query if the disk has spun down".  I additionally throttle queries to once every hour (60 minutes), just personal preference.

 

Link to comment
Share on other sites

  • 0
7 minutes ago, Jaga said:

Scanner will poll SMART on all connected drives on a pretty high frequency, unless you restrict it with a schedule and/or turn off it's ability to wake a drive to poll it.  I highly suspect it is Scanner that's waking the drives, and not DrivePool.

I'm unsure of duplication checks on Metadata, or when they are scheduled on a pool without duplication set otherwise.  I don't think it's the culprit here.

Try disabling "Wake up to scan" in Scanner general settings, and restrict it to a work window (mine is 5am to 11am).  Then change the S.M.A.R.T. settings and check "Do not query if the disk has spun down".  I additionally throttle queries to once every hour (60 minutes), just personal preference.

 

Ok I've changed my settings to match what you suggest. Thank you for your help.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Answer this question...

×   Pasted as rich text.   Paste as plain text instead

  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.

Loading...
×
×
  • Create New...