mfsbdev(8) This is part of MooseFS mfsbdev(8) (NAME) mfsbdev - MooseFS (SYNOPSIS) mfsbdev start [-H masterhost] [-P masterport] [-B masterbind] [-S masterpath] [-p masterpassword | -x passwordfile] [-l linksocket] [-i init_mappings_file] [-o options] mfsbdev stop [-l linksocket] mfsbdev map [-l linksocket] -f mfsfile [-d nbddevice] [-n linkname] [-s bdevsize] [-b blocksize | -5 | -1 | -2 | -4] [-r] [-i] mfsbdev unmap [-l linksocket] ( -f mfsfile | -d nbddevice | -n linkname ) mfsbdev list [-l linksocket] [-t m|u|i] mfsbdev resize [-l linksocket] ( -f mfsfile | -d nbddevice | -n linkname ) [-s bdevsize] (DESCRIPTION) . . nbd . (COMMANDS) start - -l : /dev/mfs/nbdsock stop - map - mfs unmap - list - resize - ( . ) (OPTIONS) -H - 'mfsmaster' -P - '9421' -S - ( MFS ) '/' -p - -x () -p -x -x - -p () -p -x -l - /dev/mfs/nbdsock -f - mfs -d - ('/dev/nbdX') ( ) map -n - '/dev/mfs' map mfs -s - SI IEC -b - -5 - ( -b 512) -1 - ( -b 1024) -2 - ( -b 2048) -4 - ( -b 4096) -r - ( ) -i (map) - ( ro rw) -t - list map ( m) unmap ( u) mfsbdev.cfg MooseFS ( i) -i (start) - mfsbdev.cfg(5) -o - mfsmount (comma) : mfswritecachesize=N ( : 16..2048 - : 128) mfsreadaheadsize=N ( : 16..2048 - : 128) mfsreadaheadleng=N ( : 128KiB..2MiB - : 2097152 = 2MiB) mfsreadaheadtrigger=N (: 20971520) mfserroronlostchunk / mfserroronnospace / mfsioretries=N / (: 30) mfstimeout=N / (: 0 - ) mfslogretry=N / (: 5) mfsmaster=HOST MooseFS HOST ( mfsmaster ) - -H mfsport=PORT MooseFS PORT ( 9421 ) - -P mfsbind=IP - -B mfssubfolder=PATH MooseFS ( / ) - -S mfspassword=PASSWORD MooseFS PASSWORD mfspreflabels=LABELEXPR / mfsnbdtimeout=N (: 1800) (FILES) mfsbdev.cfg MooseFS mfsbdev.cfg(5) (EXAMPLES) mfsbdev start - nbd (masterhost = mfsmaster masterport = 9421 linksocket = /dev/mfs/nbdsock ) mfsbdev start -H mfsmaster.my.domain -P 9521 -x /etc/mfs/mastersecret - nbd mfsmaster.my.domain 9521 /etc/mfs/mastersecret mfsbdev stop -l /tmp/mynbdinstance - nbd /tmp/mynbdinstance mfsbdev map -f devices/mybdev1.bin -s 2Ti -n mytestvm - (/dev/mfs/nbdsock) . devices/mybdev1.bin '/dev/mfs/mytestvm' 2TiB . mfsbdev unmap -n mytestvm - mytestvm ( /dev/mfs/mytestvm ). (REPORTING BUGS) . (COPYRIGHT) Copyright (C) 2026 Jakub Kruszona-Zawadzki, Saglabs SA MooseFS . MooseFS () . MooseFS . . : . (SEE ALSO) mfsmount(8), mfsbdev.cfg(5) MooseFS 4.59.2-1 May 2026 mfsbdev(8)