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What it does
For the complete documentation index, see llms.txt . This page is also available as Markdown . Ask On this page FAQ Storage Media Debugging Sometimes issues occur with the media being used (the medium that balenaOS and all other data is stored on, for example an SD card or eMMC drive). This can include multiple issues, but the most common are that of exhaustion of free space on a device, or that of SD card corruption. Out of Space Issues A media partition that is full can cause issues such as the following: Failure to download release updates, or failure to start new/updated services after a download has occurred Failure for a service to store data into defined volumes Failure of services to start up (mostly those that need to store data that isn't in tmpfs ) Determining how much space is left on the media for a device can be achieved by logging into the host OS and running: Ask Copy root@debug-device:~# df -h Filesystem Size Used Avail Use% Mounted on devtmpfs 783M 0 783M 0% /dev tmpfs 950M 5.3M 945M 1% /run /dev/mmcblk0p2 300M 276M 4.5M 99% /mnt/sysroot/active /dev/disk/by-state/resin-state 18M 75K 16M 1% /mnt/state overlay 300M 276M 4.5M 99% / /dev/mmcblk0p6 29G 367M 27G 2% /mnt/data tmpfs 950M 0 950M 0% /dev/shm tmpfs 4.0M 0 4.0M 0% /sys/fs/cgroup tmpfs 950M 0 950M 0% /tmp tmpfs 950M 40K 950M 1% /var/volatile /dev/mmcblk0p1 40M 7.2M 33M 19% /mnt/boot /dev/mmcblk0p3 300M 14K 280M 1% /mnt/sysroot/inactive The -h switch makes the figures returned 'human readable'. Without this switch the returned figures will be in block sizes (usually 1k or 512byte blocks). The two main mounts where full space problems commonly occur are /mnt/data and /mnt/state . The former is the data partition where all service images, containers and volumes are stored.
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