Hello,
I am having an issue w/ snapraid. i have added in 5 more disk to my pool (it was AUFS, but when i added in the new disk i changed over to mergerFS) the pool appears to be work fine. But when snapraid cron job runs i get an email.
WARNING! All the files previously present in disk '5tb01a3' at dir '/media/d60d3cc6-162e-46b3-9e9a-0e9019dc6aaa/'
are now missing or rewritten!
This could happen when restoring a disk with a backup
program that is not setting correctly the timestamps.
If you want to 'sync' anyway, use 'snapraid --force-empty sync'.
when ssh into the machine and check that drive everything is there, and i am still able to access the files that would be on that drive via mergerfs file share.
I know i should not have changed two things when i did my upgrade (adding disk and changing drive pool method).
Thanks you for any information.

snapraid is done via individual disk

/etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sdl1 during installation
UUID=bdc068df-be37-4d01-974d-e317750a35c1 / ext4 errors=remount-ro 0 1
# swap was on /dev/sdl5 during installation
UUID=a3ed0cca-62bb-436e-b530-f8e45db25c5f none swap sw 0 0
/dev/sr0 /media/cdrom0 udf,iso9660 user,noauto 0 0
/dev/sr1 /media/cdrom1 udf,iso9660 user,noauto 0 0
/dev/sda1 /media/usb0 auto rw,user,noauto 0 0
# >>> [openmediavault]
UUID=adfc7388-4210-42ee-9013-f1546bf4bfe3 /media/adfc7388-4210-42ee-9013-f1546bf4bfe3 ext4 defaults,nofail,user_xattr,noexec,usrjquota=aquota.user,grpjquota=aquota .group,jqfmt=vfsv0,acl 0 2
UUID=49e74ac0-8db0-45ba-9a49-bedad267998f /media/49e74ac0-8db0-45ba-9a49-bedad267998f ext4 defaults,nofail,user_xattr,noexec,usrjquota=aquota.user,grpjquota=aquota .group,jqfmt=vfsv0,acl 0 2
UUID=6399c001-154d-4233-885b-e910f79783e7 /media/6399c001-154d-4233-885b-e910f79783e7 ext4 defaults,nofail,user_xattr,noexec,usrjquota=aquota.user,grpjquota=aquota .group,jqfmt=vfsv0,acl 0 2
UUID=f6371aca-cc94-4a81-bf05-dffea0d33382 /media/f6371aca-cc94-4a81-bf05-dffea0d33382 ext4 defaults,nofail,user_xattr,noexec,usrjquota=aquota.user,grpjquota=aquota .group,jqfmt=vfsv0,acl 0 2
UUID=07af485c-367a-4b5c-a1f0-fb3050720d24 /media/07af485c-367a-4b5c-a1f0-fb3050720d24 ext4 defaults,nofail,user_xattr,noexec,usrjquota=aquota.user,grpjquota=aquota .group,jqfmt=vfsv0,acl 0 2
UUID=ed5b0af4-7d68-4069-824c-b3f1642406a7 /media/ed5b0af4-7d68-4069-824c-b3f1642406a7 ext4 defaults,nofail,user_xattr,noexec,usrjquota=aquota.user,grpjquota=aquota .group,jqfmt=vfsv0,acl 0 2
UUID=33a402e0-d971-4f51-a10c-0f14314ad311 /media/33a402e0-d971-4f51-a10c-0f14314ad311 ext4 defaults,nofail,user_xattr,noexec,usrjquota=aquota.user,grpjquota=aquota .group,jqfmt=vfsv0,acl 0 2
UUID=1a3a3379-f70e-4f7c-8fa1-4b234fd2a0a4 /media/1a3a3379-f70e-4f7c-8fa1-4b234fd2a0a4 xfs defaults,nofail,noexec,usrquota,grpquota,inode64 0 2
UUID=c5121cf7-715c-46d8-afc9-6dc2d413b528 /media/c5121cf7-715c-46d8-afc9-6dc2d413b528 xfs defaults,nofail,noexec,usrquota,grpquota,inode64 0 2
UUID=936f3d1a-4886-4893-8505-d8e930825778 /media/936f3d1a-4886-4893-8505-d8e930825778 xfs defaults,nofail,noexec,usrquota,grpquota,inode64 0 2
UUID=5fd407a1-4899-4eeb-87b3-c6f6b6ca73b9 /media/5fd407a1-4899-4eeb-87b3-c6f6b6ca73b9 xfs defaults,nofail,noexec,usrquota,grpquota,inode64 0 2
UUID=d60d3cc6-162e-46b3-9e9a-0e9019dc6aaa /media/d60d3cc6-162e-46b3-9e9a-0e9019dc6aaa xfs defaults,nofail,noexec,usrquota,grpquota,inode64 0 2
/media/07af485c-367a-4b5c-a1f0-fb3050720d24:/media/f6371aca-cc94-4a81-bf05-dffea0d33382:/media/6399c001-154d-4233-885b-e910f79783e7:/media/49e74ac0-8db0-45ba-9a49- bedad267998f:/media/936f3d1a-4886-4893-8505-d8e930825778:/media/1a3a3379-f70e-4f7c-8fa1-4b234fd2a0a4:/media/c5121cf7-715c-46d8-afc9-6dc2d413b528:/media/d60d3cc6-16 2e-46b3-9e9a-0e9019dc6aaa:/media/5fd407a1-4899-4eeb-87b3-c6f6b6ca73b9 /media/26371579-5169-4eb8-852a-31ff6f14626e fuse.mergerfs defaults,allow_other,category.creat e=mfs,minfreespace=4G 0 0
/media/26371579-5169-4eb8-852a-31ff6f14626e/media /export/media none bind 0 0
/media/26371579-5169-4eb8-852a-31ff6f14626e/winshare /export/winshare none bind 0 0
# <<< [openmediavault]

/etc/snapraid.conf
# this file was automatically generated from
# openmediavault Stone burner 2.2.14
# and 'openmediavault-snapraid' 1.5

block_size 256
autosave 0
nohidden

#####################################################################
# OMV-Name: 2tb_01 Drive Label: 2tb_01
content /media/49e74ac0-8db0-45ba-9a49-bedad267998f/snapraid.content
disk 2tb_01 /media/49e74ac0-8db0-45ba-9a49-bedad267998f

#####################################################################
# OMV-Name: 2tb_02 Drive Label: 2tb_02
content /media/6399c001-154d-4233-885b-e910f79783e7/snapraid.content
disk 2tb_02 /media/6399c001-154d-4233-885b-e910f79783e7

#####################################################################
# OMV-Name: 2tb_03 Drive Label: 2tb_03
content /media/f6371aca-cc94-4a81-bf05-dffea0d33382/snapraid.content
disk 2tb_03 /media/f6371aca-cc94-4a81-bf05-dffea0d33382

#####################################################################
# OMV-Name: 2tb_04 Drive Label: 2tb_04
disk 2tb_04 /media/07af485c-367a-4b5c-a1f0-fb3050720d24

#####################################################################
# OMV-Name: 6tb_01_A6 Drive Label: 6tb_01_A6
parity /media/33a402e0-d971-4f51-a10c-0f14314ad311/snapraid.parity

#####################################################################
# OMV-Name: 6tb_02_B6 Drive Label: 6tb_02_B6
2-parity /media/ed5b0af4-7d68-4069-824c-b3f1642406a7/snapraid.2-parity

#####################################################################
# OMV-Name: 3tb02 Drive Label: 3tb02
disk 3tb02 /media/c5121cf7-715c-46d8-afc9-6dc2d413b528

#####################################################################
# OMV-Name: 3tb01 Drive Label: 3tb01
disk 3tb01 /media/1a3a3379-f70e-4f7c-8fa1-4b234fd2a0a4

#####################################################################
# OMV-Name: 3tb03 Drive Label: 3tb03
disk 3tb03 /media/936f3d1a-4886-4893-8505-d8e930825778

#####################################################################
# OMV-Name: 5tb01a3 Drive Label: 5tb01a3
disk 5tb01a3 /media/d60d3cc6-162e-46b3-9e9a-0e9019dc6aaa

#####################################################################
# OMV-Name: 5tb02b3 Drive Label: 5tb02b3
disk 5tb02b3 /media/5fd407a1-4899-4eeb-87b3-c6f6b6ca73b9

exclude *.bak
exclude *.unrecoverable
exclude /tmp/
exclude lost+found/
exclude .content
exclude aquota.group
exclude aquota.user
exclude snapraid.conf*

Snapraid automated email bottom from Sun Jul 16
2tb_01 0% | 2tb_02 33% | ******************* 2tb_03 9% | ***** 2tb_04 3% | * 3tb02 0% | 3tb01 0% | 3tb03 0% | 5tb01a3 0% | 5tb02b3 0% | parity 2% | * 2-parity 2% | * raid 29% | ***************** hash 17% | ********** sched 1% | misc 0% | |____________________________________________________________ wait time (total, less is better) Everything OK Saving state to /media/49e74ac0-8db0-45ba-9a49-bedad267998f/snapraid.content... Saving state to /media/6399c001-154d-4233-885b-e910f79783e7/snapraid.content... Saving state to /media/f6371aca-cc94-4a81-bf05-dffea0d33382/snapraid.content... Verifying /media/49e74ac0-8db0-45ba-9a49-bedad267998f/snapraid.content... Verifying /media/6399c001-154d-4233-885b-e910f79783e7/snapraid.content... Verifying /media/f6371aca-cc94-4a81-bf05-dffea0d33382/snapraid.content... SnapRAID SYNC Job finished - Sun Jul 16 02:27:36 PDT 2017 ---------------------------------------- SnapRAID SCRUB-Cycle count (7) not met (4). No scrub was run. - Sun Jul 16 02:27:36 PDT 2017 Yours, SnapRAID-diff script


Snapraid automated email bottom from Sat Jul 22
2tb_01 0% | 2tb_02 32% | ******************* 2tb_03 11% | ****** 2tb_04 1% | * 3tb02 0% | 3tb01 0% | 3tb03 0% | 5tb01a3 0% | 5tb02b3 0% | parity 0% | 2-parity 0% | raid 35% | ******************** hash 17% | ********** sched 0% | misc 0% | |____________________________________________________________ wait time (total, less is better) 22752 file errors 0 io errors 0 data errors Saving state to /media/49e74ac0-8db0-45ba-9a49-bedad267998f/snapraid.content... Saving state to /media/6399c001-154d-4233-885b-e910f79783e7/snapraid.content... Saving state to /media/f6371aca-cc94-4a81-bf05-dffea0d33382/snapraid.content... Verifying /media/49e74ac0-8db0-45ba-9a49-bedad267998f/snapraid.content... Verifying /media/6399c001-154d-4233-885b-e910f79783e7/snapraid.content... Verifying /media/f6371aca-cc94-4a81-bf05-dffea0d33382/snapraid.content... SnapRAID SCRUB Job finished - Sat Jul 22 06:14:48 PDT 2017 ---------------------------------------- Yours, SnapRAID-diff script

edited.
The 5tb01a3 is not having issues as far as i can tell I can access all the files on it via the MergerFS share though. I will check the SMART logs on 5tb01a3

minor update. I ran "snapraid -E sync" then "snapraid touch" in an SSH section and that appears to have fixed the issue and errors (i hope)