Bypassing Synology's 32K NFS Block Size Limit with systemd

The Synology DSM GUI caps NFS read/write packet size at 32K. For a fileserver doing large sequential transfers — media files, backups, VM disk images — that’s leaving throughput on the table. The kernel supports up to 1MB block sizes, and the GUI limit is purely artificial. This post documents how to push past it on DSM 7, which uses systemd under the hood. What the setting actually controls The…