cache drive failing in btfs pool?

[merlyn]

i have 4 ssd drives setup as my cache drive in a btfs pool.

i tried to setup up as raid 10 but i never could get them to work properly.

so i believe they are currently in raid 1 not sure which or how to even tell which. it says raid one in the btfs pool.

they have been working fine for months like this.

a few days ago i noticed VM’s stopped working with VNC i simply could not get into them. VM logs will not even load.

other vms work fine.

i see errors coming up all over the place in the unraid logs

unraid is laggy of course and generally freezing while it pauses to read from the disks.

i am seeing sectors being moved.

can someone help me reduce this pool to one drive and figure out what drive is failing ?

i rebooted this morning and ever since btfs pool is running balance.  got about 30 percent left to run.

showing close to a billion reads and writes on some of my cache drives since this morning.

 

the silly thing is all my vms will fit on any one ssd drive.

 

help

 

merlyn

 

 

 

 

 

tower-diagnostics-20201030-1800.zip

[merlyn]

so after the balance ran automatically after i rebooted for 15 hours it now shows no balance found for /mnt/cache.

 

and of course the VM that has files i do not have backed up is still not working

 

do i run scrub ... or scrub with repair corrupted blocks checked?

or boot in maintenance mode and run a check? i have no idea what to do first.

 

 

[JorgeB]

9 hours ago, merlyn said:

i have 4 ssd drives setup as my cache drive in a btfs pool.

Currently the pool is only using 3 devices.

[merlyn]

Thanks JorgeB.

 

i am currently copying data off the working vms on the cache to the array and it will probably take a while. about 4 TB copied off already.

any suggestion for how to fix the mint linux VM that will no longer boot?

i of course have data on it that i need to get off it.  its not booting so i don’t know to retrieve it. 

and i don’t want to run the wrong repair tool and damage it more.

 

thanks for any advice you can give.

[JorgeB]

19 hours ago, merlyn said:

any suggestion for how to fix the mint linux VM that will no longer boot?

Sorry, no, you can run a scrub on the pool, but if the vdisks are on a NOCOW share they can't be fixed, more info here, also don't forget that you should always have backups of anything important.