SAS2LP NR_REQUEST tweak can't be applied now that I have different SAS cards


ramesivi

Recommended Posts

I went from running 3x SAS2LP to 2x SAS2LP and 1x LSI card so I could expand to 30 drives and dual parity. However, NR_REQUESTS set to 8 slows down the LSI card and it's well known the SAS2LP cards need this tweak for ideal parity speeds. I am getting almost 2 day parity checks with 12TB drives (130MB/s) now. I have tried various middle grounds like 16,32,64 but nothing gets the speeds up to where they should be. I was getting 190-200MB/s before.

 

There seems to be no way to fix this other than buy a second LSI card and get rid of the 2x SAS2LP cards? Anyway I can fix this without spending another $200?

 

Edited by ramesivi
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.