Hi,

 

I have problem with two cache drives. Basically with one cache slot and with cache drive it works but when I add one more the whole cache pool truns into unmountable.

 

More detailed:

-Number of cache slots 1 and one drive -> everything works (pic. unraid_working)

-Number of cache slots 2 and one drive -> unmountable (pic. not_working_setup_1 and not_working_1)

-Number of cache slots 2 and two drives -> unmountable (pic. unraid_not_working_2)

And same result if I use the other drive (sdg) in slot one.

 

Unraid tells me to format Cache drive (sdh) but when I press the button nothing happens. Same thing if I use sdg as cache #1.

 

I’m also getting error in system log:

Jun  1 23:01:15 Tower logger: ERROR: could not scan /dev/sdi1

Jun  1 23:01:27 Tower emhttp: mount error: No file system (no btrfs UUID)

 

And disk status:

File system status: Unmountable - No file system (no btrfs UUID)

File system type: btrfs

--

Label: none  uuid: 244aeedd-5fab-42a9-95bf-28f61b272929

                            Total devices 1 FS bytes used 5.56TiB

                            devid    1 size 7.28TiB used 6.37TiB path /dev/md1

 

Label: none  uuid: 16b7fe0b-575f-46d6-9005-3ef2fd4dcfd2

                            Total devices 1 FS bytes used 1.31GiB

                            devid    1 size 10.00GiB used 4.04GiB path /dev/loop0

 

ERROR: could not scan /dev/sdi1

Label: none  uuid: 80c869d5-aab8-4dfa-9059-43d1d51c4479

                            Total devices 1 FS bytes used 384.00KiB

                            devid    1 size 111.79GiB used 1.02GiB path /dev/sdg1

 

Label: none  uuid: a5eb051e-0ef5-4d92-8315-7cf0dba78730

                            Total devices 1 FS bytes used 640.00KiB

                            devid    1 size 111.79GiB used 2.01GiB path /dev/sdh1

 

btrfs-progs v4.1.2

 

Thanks for your help!

 

-Lauri

not_working.zip

Any ideas about this? Can mixed file system I'm having couse this?

Maybe try preclearing or formatting them individually. See here

Hi launitt and thank you for your patience while we research this issue.  Were these SSDs previously used for other things such as a Windows or another OS installation?  The issue may be that multiple partitions exist on the disk(s) in question.  Please see trurl's response about preclearing/formatting and the link he provides.  I think that may be the solution to your issue.  If you don't believe that's accurate, please obtain a full diagnostics from your system (under the Tools -> Diagnostics page in the unRAID webGui) and upload that file back to us.  Do this after attempting to create a multiple device pool on the system.

I think this is solved now. Second cache drive formatted properly to btrfs and data is written on both drives. I formatted my data drives to btrfs so that now all drives are btrfs. So, I think that use of mixed file between data drives caused this.