here the disk free output:
root@ScaltricciWDnas settings # df -k |grep HD
/dev/sda4 951204 128400 806420 14% /mnt/HD_a4
/dev/sdb4 951204 56 934764 0% /mnt/HD_b4 /dev/md1 9684297112 95844 9586562656 0% /mnt/HD/HD_a2
see below the sync.log extract:
...platform: Linux 4.14.22-armada-18.09.3 #1 SMP Mon Nov 9 06:53:35 UTC 2020 ga-18.09.3 Build-19 armv7l
version: 2.7.2.1375
[20201201 22:10:54.322] ZIP: Can't locate [version] in zip, error -100.
[20201201 22:10:54.322] Configuration from file "/mnt/HD/HD_a2/Nas_Prog/ResilioSync/settings/sync.conf" has been applied
[20201201 22:10:54.348] Directory root is "/mnt"
[20201201 22:10:54.349] test sha1: AE5BD8EFEA5322C4D9986D06680A781392F9A642
[20201201 22:10:54.349] test sha2: 630DCD2966C4336691125448BBB25B4FF412A49C732DB2C8ABC1B8581BD710DD
[20201201 22:10:54.349] test aes: 0A940BB5416EF045F1C39458C653EA5A07FEEF74E1D5036E900EEE118E949293
[20201201 22:10:54.350] DISKIO[0x01429bac]: Create diskio pool for drive with id 18446744073709551614, path: , type: 0, size: 1
[20201201 22:10:54.350] WORKER[0x01431b30]: created
[20201201 22:10:54.350] DISKIO[0x01429bac]: created
[20201201 22:10:54.350] WORKER[0x014456ac]: created
[20201201 22:10:54.350] WORKER[0x014328cc]: created
[20201201 22:10:54.350] WORKER[0x0143f544]: created
[20201201 22:10:54.351] WORKER[0x014456ac]: thread start
[20201201 22:10:54.351] WORKER[0x014328cc]: thread start
[20201201 22:10:54.351] WORKER[0x0143f544]: thread start
[20201201 22:10:54.351] register completion queue with id 0
[20201201 22:10:54.352] DISK_WORKER[0x01431b30]: diskio thread start, drive_id = 18446744073709551614, priority = normal
[20201201 22:10:54.424] UDP: UDPSocketManager::QuotaData::SetLimit KBps=10485760 pps=6990506
[20201201 22:10:54.424] UDP: UDPSocketManager::QuotaData::SetLimit KBps=10485760 pps=6990506
[20201201 22:10:54.424] UDP: UDPSocketManager::QuotaData::SetLimit KBps=10485760 pps=6990506
[20201201 22:10:54.424] UDP: UDPSocketManager::QuotaData::SetLimit KBps=10485760 pps=6990506
[20201201 22:10:54.424] register completion queue with id 0
[20201201 22:10:54.425] 20PeerListenConnection::listen[0x014418c8][7] bound listening socket 7 to IP 0.0.0.0:29328
[20201201 22:10:54.425] 20PeerListenConnection::listen[0x01440ca0][8] bound listening socket 8 to IP [::]:29328
[20201201 22:10:54.425] UDP: UDPSocketManager::QuotaData::SetLimit KBps=10485760 pps=6990506
[20201201 22:10:54.425] UDP: UDPSocketManager::QuotaData::SetLimit KBps=10485760 pps=6990506
[20201201 22:10:54.426] UDP: UDP: bound listening socket 9 to IP 0.0.0.0:29328
[20201201 22:10:54.426] UDP: UDP: bound listening socket 9 to IP 0.0.0.0:29328
[20201201 22:10:54.426] UDP: UDP getsockopt(SO_SNDBUF) default=163840
[20201201 22:10:54.426] UDP: UDP increased SO_SNDBUF to 4194304
[20201201 22:10:54.426] UDP: UDP getsockopt(SO_RCVBUF) default=163840
[20201201 22:10:54.426] UDP: UDP increased SO_RCVBUF to 33554432
[20201201 22:10:54.426] UDP: UDPSocketManager::QuotaData::SetLimit KBps=10485760 pps=6990506
[20201201 22:10:54.426] UDP: UDPSocketManager::QuotaData::SetLimit KBps=10485760 pps=6990506
[20201201 22:10:54.426] UDP: UDP: bound listening socket 12 to IP [::]:29328
[20201201 22:10:54.426] UDP: UDP: bound listening socket 12 to IP [::]:29328
[20201201 22:10:54.426] UDP: UDP getsockopt(SO_SNDBUF) default=163840
[20201201 22:10:54.426] UDP: UDP increased SO_SNDBUF to 4194304
[20201201 22:10:54.426] UDP: UDP getsockopt(SO_RCVBUF) default=163840
[20201201 22:10:54.426] UDP: UDP increased SO_RCVBUF to 33554432
[20201201 22:10:54.427] 20HttpListenConnection::listen[0x0144de20][15] bound listening socket 15 to IP 0.0.0.0:8889
[20201201 22:10:54.433] register completion queue with id 0
[20201201 22:10:54.433] register completion queue with id 1
[20201201 22:10:54.433] register completion queue with id 1
[20201201 22:10:54.443] IPv6 is installed
[20201201 22:10:54.443] Unsupported or empty sync.dat file
[20201201 22:10:54.443] My new PeerID: 204928B5F4A0F0EA69FB687E06254D6ECE022919
[20201201 22:10:54.443] LC: LoadLicenses: there is no pro license
[20201201 22:10:54.446] HTTP[0xb3e04700][/e?i=2000&e=eyJhY3Rpb24iOiJpbnN0YWxsIiwiYiI6InN5bmMiLCJjYyI6MCwiY2lkIjoicUExSU94S1VLRGswal82SyIsImN2IjoiMi43LjIiLCJldmVudE5hbWUiOiJzeW5jQmFzaWMiLCJwbCI6ImxpbnV4I
[20201201 22:10:54.446] HTTP[0xb3e06400][/e?i=2000&e=eyJhY3Rpb24iOiJ1cGdyYWRlIiwiYiI6InN5bmMiLCJjYyI6MCwiY2lkIjoicUExSU94S1VLRGswal82SyIsImN2IjoiMi43LjIiLCJldmVudE5hbWUiOiJzeW5jQmFzaWMiLCJwbCI6ImxpbnV4I
[20201201 22:10:54.446] HTTP[0xb3e099c0][/e?i=2000&e=eyJhY3Rpb24iOiJzdGFydHVwIiwiYiI6InN5bmMiLCJjYyI6MCwiY2lkIjoicUExSU94S1VLRGswal82SyIsImN2IjoiMi43LjIiLCJkYXRhIjowLCJkZXUiOmZhbHNlLCJldmVudE5hbWUiOiJze
[20201201 22:10:54.446] Scheduler: Apply global rule, download limit: -1, upload limit: -1
[20201201 22:10:54.448] CoreState: Total memory: 1061552128, used by Sync: 14712832, percentage used: 1.39
[20201201 22:10:54.448] CoreState: Cpu load: 0
[20201201 22:10:54.448] CoreState: Process cpu load: 0
[20201201 22:10:54.448] message thread start
[20201201 22:10:54.449] SYS_RES: drive "/", id: 256, capacity: 53925888, free_space: 32683008
[20201201 22:10:54.449] SYS_RES: drive "/usr/local/upload", id: 66306, capacity: 292049920, free_space: 292036608
[20201201 22:10:54.449] SYS_RES: drive "/mnt/HD_a4", id: 2052, capacity: 957255680, free_space: 825778176
[20201201 22:10:54.449] SYS_RES: drive "/mnt/HD_b4", id: 2068, capacity: 957255680, free_space: 957202432 [20201201 22:10:54.449] SYS_RES: drive "/mnt/HD/HD_a2", id: 2305, capacity: 9816738304000, free_space: 9816643125248
[20201201 22:10:54.449] SYS_RES: low disk space on device: disk_free: 292036608 disk_total: 292049920 min_free_space: 0 GB / 100.000000%
[20201201 22:10:54.449] SYS_RES: low disk space on device: disk_free: 957202432 disk_total: 957255680 min_free_space: 0 GB / 100.000000%
[20201201 22:10:54.449] SYS_RES: low disk space on device: disk_free: 825778176 disk_total: 957255680 min_free_space: 0 GB / 100.000000% [20201201 22:10:54.449] SYS_RES: low disk space on device: disk_free: 9816643125248 disk_total: 9816738304000 min_free_space: 0 GB / 100.000000%
[20201201 22:10:54.449] SYS_RES: low disk space on device: disk_free: 32683008 disk_total: 53925888 min_free_space: 0 GB / 100.000000%
hope this can help
C.