I just moved to a new machine. As usual, the restoration process went fairly smoothly.

There is one issue remaining though, impacting two apps.

Both were configured to use an external media mount (the kind that is included in backup), which was a secondary disk. That disk is unavailable on the new machine.

For these two apps, the restoration failed, because it this disk could not be found. I tried to set the apps storage to use the default storage, but I couldn't because they are in error state.

What do I need to do to fix this issue and get the apps up-and-running again with their data?

Output of cloudron-support --troubleshoot

Vendor: QEMU Product: Standard PC (Q35 + ICH9, 2009)
Linux: 6.8.0-107-generic
Ubuntu: noble 24.04
Execution environment: kvm
Processor: Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz
BIOS pc-q35-10.2  CPU @ 2.0GHz x 4
RAM: 12177808KB
Disk: /dev/sda2        45G
[OK]    node version is correct
[OK]    IPv6 is enabled and public IPv6 address is working
[OK]    docker is running
[OK]    docker version is correct
[OK]    MySQL is running
[OK]    netplan is good
[OK]    DNS is resolving via systemd-resolved
[OK]    unbound is running
[OK]    nginx is running
[OK]    dashboard cert is valid
[OK]    dashboard is reachable via loopback
[OK]    No pending database migrations
[OK]    Service 'mysql' is running and healthy
[OK]    Service 'postgresql' is running and healthy
[OK]    Service 'mongodb' is running and healthy
[OK]    Service 'mail' is running and healthy
[OK]    Service 'graphite' is running and healthy
[OK]    Service 'sftp' is running and healthy
[OK]    box v9.1.5 is running
[OK]    Dashboard is reachable via domain name
[WARN]  Domain <redacted> expiry check skipped because whois does not have this information

Excerpt from the app log:

2026-04-02T22:00:31.732Z tasks: updating task 20419 with: {"percent":65,"message":"Downloading 15488M@6MBps"}
2026-04-02T22:00:38.028Z tasks: updating task 20419 with: {"percent":65,"message":"Still downloading backup (3721s, 15488M)"}
2026-04-02T22:00:41.737Z tasks: updating task 20419 with: {"percent":65,"message":"Downloading 15552M@6MBps"}
2026-04-02T22:00:50.832Z backupformat/tgz: tarExtract: extracted 217597 entries
2026-04-02T22:00:50.833Z backupformat/tgz: tarExtract: pipeline finished: {"startTime":1775163517410,"duration":3733423,"transferred":16364142900}
2026-04-02T22:00:50.833Z backuptask: downloadApp: time: 3751.965
2026-04-02T22:00:50.833Z tasks: updating task 20419 with: {"percent":70,"message":"Restoring addons"}
2026-04-02T22:00:51.395Z services: restoreAddons: restoring ["postgresql","ldap","sendmail","oidc","redis","localstorage","scheduler","turn"]
2026-04-02T22:00:51.396Z services: Restore postgresql
2026-04-02T22:02:41.597Z services: Setting up LDAP
2026-04-02T22:02:41.726Z services: Setting up SendMail
2026-04-02T22:02:41.727Z services: Setting sendmail addon config to [{"name":"CLOUDRON_MAIL_SMTP_SERVER","value":"mail"},{"name":"CLOUDRON_MAIL_SMTP_PORT","value":"2525"},{"name":"CLOUDRON_MAIL_SMTPS_PORT","value":"2465"},{"name":"CLOUDRON_MAIL_STARTTLS_PORT","value":"2587"},{"name":"CLOUDRON_MAIL_SMTP_USERNAME","value":"nextcloud.app@<redacted>"},{"name":"CLOUDRON_MAIL_SMTP_PASSWORD","value":"<redacted>"},{"name":"CLOUDRON_MAIL_FROM","value":"nextcloud.app@<redacted>"},{"name":"CLOUDRON_MAIL_DOMAIN","value":"<redacted>"}]
2026-04-02T22:02:41.761Z services: Setting up OIDC
2026-04-02T22:02:41.787Z services: Restoring redis
2026-04-02T22:02:41Z [POST] /restore
2026-04-02T22:02:41Z restoring
2026-04-02T22:02:42Z 13:M 02 Apr 2026 22:02:42.062 * BGSAVE done, 0 keys saved, 0 keys skipped, 88 bytes written.
2026-04-02T22:02:42Z 13:M 02 Apr 2026 22:02:42.062 * Saving the final RDB snapshot before exiting.
2026-04-02T22:02:42Z 13:M 02 Apr 2026 22:02:42.062 * User requested shutdown...
2026-04-02T22:02:42Z 13:M 02 Apr 2026 22:02:42.208 # Redis is now ready to exit, bye bye...
2026-04-02T22:02:42Z 13:M 02 Apr 2026 22:02:42.208 * DB saved on disk
2026-04-02T22:02:42Z 13:M 02 Apr 2026 22:02:42.208 * Removing the pid file.
2026-04-02T22:02:42Z 13:signal-handler (1775167362) Received SIGTERM scheduling shutdown...
2026-04-02T22:02:42Z 2026-04-02 22:02:42,019 INFO waiting for redis to stop
2026-04-02T22:02:42Z 2026-04-02 22:02:42,210 INFO stopped: redis (exit status 0)
2026-04-02T22:02:42Z 2026-04-02 22:02:42,997 INFO spawned: 'redis' with pid 46
2026-04-02T22:02:43Z 46:C 02 Apr 2026 22:02:43.017 # WARNING Memory overcommit must be enabled! Without it, a background save or replication may fail under low memory condition. Being disabled, it can also cause failures without low memory condition, see https://github.com/jemalloc/jemalloc/issues/1328. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
2026-04-02T22:02:43Z 46:C 02 Apr 2026 22:02:43.017 * Configuration loaded
2026-04-02T22:02:43Z 46:C 02 Apr 2026 22:02:43.017 * Redis version=8.4.0, bits=64, commit=00000000, modified=1, pid=46, just started
2026-04-02T22:02:43Z 46:C 02 Apr 2026 22:02:43.017 * oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
2026-04-02T22:02:43Z 46:M 02 Apr 2026 22:02:43.018 # Failed to write PID file: Permission denied
2026-04-02T22:02:43Z 46:M 02 Apr 2026 22:02:43.018 * Increased maximum number of open files to 10032 (it was originally set to 1024).
2026-04-02T22:02:43Z 46:M 02 Apr 2026 22:02:43.018 * Running mode=standalone, port=6379.
2026-04-02T22:02:43Z 46:M 02 Apr 2026 22:02:43.018 * monotonic clock: POSIX clock_gettime
2026-04-02T22:02:43Z 46:M 02 Apr 2026 22:02:43.019 * Loading RDB produced by version 8.4.0
2026-04-02T22:02:43Z 46:M 02 Apr 2026 22:02:43.019 * RDB age 14982 seconds
2026-04-02T22:02:43Z 46:M 02 Apr 2026 22:02:43.019 * RDB memory usage when created 37.47 Mb
2026-04-02T22:02:43Z 46:M 02 Apr 2026 22:02:43.019 * Server initialized
2026-04-02T22:02:43Z 46:M 02 Apr 2026 22:02:43.171 * DB loaded from disk: 0.153 seconds
2026-04-02T22:02:43Z 46:M 02 Apr 2026 22:02:43.171 * Done loading RDB, keys loaded: 29201, keys expired: 53.
2026-04-02T22:02:43Z 46:M 02 Apr 2026 22:02:43.171 * Ready to accept connections tcp
2026-04-02T22:02:44.212Z tasks: updating task 20419 with: {"percent":80,"message":"Creating container"}
2026-04-02T22:02:44.241Z apptask: createContainer: creating container
2026-04-02T22:02:44.246Z shell: mounts: mountpoint -q -- /mnt/volumes/d8d52065be8d499f85c1e566498693bb
2026-04-02T22:02:44.260Z shell: mounts: mountpoint -q -- /mnt/volumes/d8d52065be8d499f85c1e566498693bb errored BoxError: mountpoint exited with code 32 signal null
2026-04-02T22:02:44.261Z shell: mounts: systemd-escape -p --suffix=mount /mnt/volumes/d8d52065be8d499f85c1e566498693bb
2026-04-02T22:02:44.273Z shell: mounts: journalctl -u mnt-volumes-d8d52065be8d499f85c1e566498693bb.mount\n -n 10 --no-pager -o json
2026-04-02T22:02:44.286Z apptask: run: app error for state pending_restore: BoxError: Storage volume "External Data" is not active. Could not determine mount failure reason. 
2026-04-02T22:02:44.325Z tasks: setCompleted - 20419: {"result":null,"error":{"message":"Storage volume \"External Data\" is not active. Could not determine mount failure reason. ","reason":"Bad State"},"percent":100}
2026-04-02T22:02:44.325Z tasks: updating task 20419 with: {"completed":true,"result":null,"error":{"message":"Storage volume \"External Data\" is not active. Could not determine mount failure reason. ","reason":"Bad State"},"percent":100}
2026-04-02T22:02:44.342Z Exiting with code 0
2026-04-02T22:02:44.342Z taskworker: Task took 4088.725 seconds
2026-04-02T22:02:44Z 2026-04-02 22:02:44,173 INFO success: redis entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
2026-04-04T10:05:01Z [GET] /healthcheck
BoxError: Storage volume "External Data" is not active. Could not determine mount failure reason. 
pipeFileToRequest: piped /home/yellowtent/appsdata/b62559e1-63a2-443c-8afc-cf91c3f4faab/dump.rdb, waiting for response
pipeFileToRequest: piped /home/yellowtent/appsdata/b62559e1-63a2-443c-8afc-cf91c3f4faab/postgresqldump, waiting for response
pipeFileToRequest: piping /home/yellowtent/appsdata/b62559e1-63a2-443c-8afc-cf91c3f4faab/dump.rdb
pipeFileToRequest: piping /home/yellowtent/appsdata/b62559e1-63a2-443c-8afc-cf91c3f4faab/postgresqldump
pipeFileToRequest: response status code 200
pipeFileToRequest: response status code 200
pipeFileToRequest: success
pipeFileToRequest: success
}
}