Thank you guys! I solved in this way: boot> boot -s # mount -uw / # fsck
---------------------------- Original Message ---------------------------- Subject: System BOOT (and load) Read-Only File System From: "Max Power" <open...@cpnetserver.net> Date: Thu, June 4, 2015 10:52 pm To: misc@openbsd.org -------------------------------------------------------------------------- Last night I turned off the server, all ok. This morning I turned on the server (OpenBSD 5.7 amd64) and the system loads read-only file system... I can not even settle with fsck (just because the file system is read-only). A tip, thanks.