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Linux: Mounting a loopback ext4/xfs filesystem to isolate or enforce storage limits

The physical partitions and filesystem formats on your host are configured for your main workload, but if you want an application to use a specific filesystem (xfs, ext4, zfs) and size capacity without reconfiguration at the physical level then you can consider a loopback image. For example, if we create a 100Mb disk file named Linux: Mounting a loopback ext4/xfs filesystem to isolate or enforce storage limits