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v1.6.55 - The server keeps its own free-space reserve, and /health watches the disk
The library page held back some free space before offering Download, but the server did not, so
anything calling the API directly could fill the disk.
- The server now refuses a download while free space, less what running downloads still need, is
already inside the reserve (the larger of 2 GiB and 2% of the disk). The page reads the same
reserve from the server. /healthhas adiskcomponent: degraded while the disk is inside the reserve, and unhealthy
if it cannot be measured.
Upgrade: pull it. A server whose disk is already inside the reserve reports degraded after the
upgrade; free some space or lower the cache size.