N年前从FB 5.2安装到现在，现在/区不够了。

# df -h
Filesystem Size Used Avail Capacity Mounted on
/dev/ad0s1a 193M 193M -15M 108% /

升级过程N多的

/: write failed, filesystem is full
install: ///sbin/INS@fqho: No space left on device
install: ///sbin/INS@Krxz: No space left on device
install: ///sbin/INS@q3kq: No space left on device
install: ///sbin/INS@c8j3: No space left on device
install: ///sbin/INS@j7OU: No space left on device
install: ///sbin/INS@zzP1: No space left on device
install: ///sbin/INS@Di5i: No space left on device
install: ///sbin/INS@deIr: No space left on device
install: ///sbin/INS@hI8u: No space left on device
install: ///sbin/INS@vH5N: No space left on device
install: ///sbin/INS@j4sG: No space left on device
install: ///sbin/INS@hp8m: No space left on device
install: ///sbin/INS@enEO: No space left on device
install: ///sbin/INS@LkFT: No space left on device
install: ///sbin/INS@QF6h: No space left on device
install: ///sbin/INS@OqXB: No space left on device
install: ///sbin/INS@QXOh: No space left on device
install: ///sbin/INS@MJXi: No space left on device
install: ///sbin/INS@2bi6: No space left on device
install: ///sbin/INS@uqWV: No space left on device
install: ///sbin/INS@v6oT: No space left on device
install: ///sbin/INS@4RuK: No space left on device
install: ///sbin/INS@jWyx: No space left on device
install: ///sbin/INS@fNWY: No space left on device
install: ///sbin/INS@ddY4: No space left on device
install: ///sbin/INS@vpwn: No space left on device
install: ///sbin/INS@CxSc: No space left on device
install: ///sbin/INS@01dT: No space left on device
install: ///sbin/INS@qLWk: No space left on device
install: ///sbin/INS@h6Mc: No space left on device
install: ///sbin/INS@28KH: No space left on device
install: ///sbin/INS@iVOd: No space left on device
install: ///sbin/INS@ZASO: No space left on device
install: ///sbin/INS@rmpN: No space left on device
install: ///sbin/INS@L3ii: No space left on device
install: ///sbin/INS@4dg8: No space left on device
install: ///sbin/INS@RV7j: No space left on device
install: ///sbin/INS@pQ3w: No space left on device
install: ///sbin/INS@lkbI: No space left on device
install: ///sbin/INS@rw4L: No space left on device
install: ///sbin/INS@wtB1: No space left on device
install: ///sbin/INS@efp8: No space left on device
install: ///sbin/INS@O7zV: No space left on device