Cache drive swap from xfs to btrfs

[marcosmeanos]

Ok here we go.... Back when I first got Unraid I set up xfs for the array so assumed the cache drive would be best in the same format.

 

I now have an identical ssd to mirror the cache and have discovered it must be in btrfs to do this.

 

My question is do I use the move cache to the array, format cache drives to btrfs set up mirror and then move it back from the array or is it a start again and reinstall every thing from scratch?

[apandey]

how is your cache set up w.r.t. the shares?

 

simplest would be to:

1. stop docker / VM services (not just VMs and containers, but services themselves)

2. set all shares that use cache to cache=“yes” (make note of what they are set as so you can go back to that)

3. run the mover, make sure nothing remains on cache

4. set all shares to cache=“no”

5. again make sure nothing remains on cache, else go back to 3 🙂

6. rebuild cache as btrfs mirror

7. set all shares to original cache preference. If there were any cache=“only”, first set cache=“prefer”, then run mover and finally switch to “only”

[marcosmeanos]

app data, domains and system all currently set to cache prefered so think im good to go regarding step 7.

 

Thanks apandey

 

I will be back shortly when it all goes wrong 😄

[marcosmeanos]

update time...

 

step 1 complete, step 2 complete, step 3 mover run but data remains.

 

appdata and system still have folders on the ssd. appdata has data for an old docker i uninstalled previously and system has libvert folder in it

 

I rechecked and both shares are set to cache yes but clicking the mover wont shift the last 1.9gig from the ssd

 

whats the next step?

 

@apandey.... said I would be back

Edited April 14, 2023 by marcosmeanos

[marcosmeanos]

All sorted and now on a raid 1 cache.

 

[Arbadacarba]

Have you checked the speed on that cache? I found I lost a lot of performance when I went to Raid1 for my Domains and such...

 

 

[marcosmeanos]

Hi Arbadacarba.

 

I have just bench marked the cache and the speed is the same of 274.44MB/sec  however...... the only ports i had available for the two sata3 ssds was sata2.

 

If they were running on sata3 ports at full speed a difference would show up at that point if it was slower