1) Installing debd on matisse and dionysos [matisse]-root# rpm -qa |grep drbd drbd-kmdl-2.6.14-1.1653_FC4-0.7.11-9.rhfc4.at drbd-0.7.11-9.rhfc4.at [dionysos]-root# rpm -qa |grep drbd drbd-0.7.11-9.rhfc4.at drbd-kmdl-2.6.14-1.1656_FC4-0.7.11-9.rhfc4.at 2) After creating new partition (5GO) on matisse and dionysos [matisse]-root# /etc/init.d/drbd start [matisse]-root# /etc/init.d/drbd status drbd driver loaded OK; device status: version: 0.7.11 (api:77/proto:74) SVN Revision: 1807 build by bachbuilder@g77.physik.fu-berlin.de, 2005-12-14 13:50:28 0: cs:Connected st:Secondary/Secondary ld:Consistent ns:0 nr:0 dw:0 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 [dionysos]-root# /etc/init.d/drbd start Starting DRBD resources: [ d0 s0 n0 ]. [dionysos]-root# /etc/init.d/drbd status drbd driver loaded OK; device status: version: 0.7.11 (api:77/proto:74) SVN Revision: 1807 build by bachbuilder@g77.physik.fu-berlin.de, 2006-01-07 02:56:10 0: cs:Connected st:Secondary/Secondary ld:Consistent ns:0 nr:0 dw:0 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 3) matisse is primary [matisse]-root# drbdsetup /dev/drbd0 primary --do-what-I-say [matisse]-root# /etc/init.d/drbd status drbd driver loaded OK; device status: version: 0.7.11 (api:77/proto:74) SVN Revision: 1807 build by bachbuilder@g77.physik.fu-berlin.de, 2005-12-14 13:50:28 0: cs:Connected st:Primary/Secondary ld:Consistent ns:0 nr:0 dw:0 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 [dionysos]-root# /etc/init.d/drbd status drbd driver loaded OK; device status: version: 0.7.11 (api:77/proto:74) SVN Revision: 1807 build by bachbuilder@g77.physik.fu-berlin.de, 2006-01-07 02:56:10 0: cs:Connected st:Secondary/Primary ld:Consistent ns:0 nr:0 dw:0 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 4) Creating an ext3 file system on the primary matisse [matisse]-root# mkfs -t ext3 /dev/drbd0 mke2fs 1.38 (30-Jun-2005) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) 595552 inodes, 1190172 blocks 59508 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=1220542464 37 block groups 32768 blocks per group, 32768 fragments per group 16096 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736 Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 36 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. [matisse]-root# /etc/init.d/drbd status drbd driver loaded OK; device status: version: 0.7.11 (api:77/proto:74) SVN Revision: 1807 build by bachbuilder@g77.physik.fu-berlin.de, 2005-12-14 13:50:28 0: cs:Connected st:Primary/Secondary ld:Consistent ns:207316 nr:0 dw:207316 dr:60 al:69 bm:0 lo:0 pe:0 ua:0 ap:0 [dionysos]-root# /etc/init.d/drbd status drbd driver loaded OK; device status: version: 0.7.11 (api:77/proto:74) SVN Revision: 1807 build by bachbuilder@g77.physik.fu-berlin.de, 2006-01-07 02:56:10 0: cs:Connected st:Secondary/Primary ld:Consistent ns:0 nr:207316 dw:207316 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 5) Mounting the file system on the primary [matisse]-root# mount /dev/drbd0 /mnt/raid [matisse]-root# df Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda1 15116836 2857576 11491356 20% / /dev/shm 253276 0 253276 0% /dev/shm /dev/sda2 10080520 154908 9413544 2% /home /dev/drbd0 4685884 140512 4307340 4% /mnt/raid [matisse]-root# cp /boot/vmli* /mnt/raid [matisse]-root# ls -l /mnt/raid total 4664 drwx------ 2 root root 16384 Jan 19 09:02 lost+found -rw-r--r-- 1 root root 1639539 Jan 19 09:06 vmlinuz-2.6.11-1.1369_FC4 -rw-r--r-- 1 root root 1550959 Jan 19 09:06 vmlinuz-2.6.14-1.1653_FC4 -rw-r--r-- 1 root root 1551206 Jan 19 09:06 vmlinuz-2.6.14-1.1656_FC4 [matisse]-root# /etc/init.d/drbd status drbd driver loaded OK; device status: version: 0.7.11 (api:77/proto:74) SVN Revision: 1807 build by bachbuilder@g77.physik.fu-berlin.de, 2005-12-14 13:50:28 0: cs:Connected st:Primary/Secondary ld:Consistent ns:212016 nr:0 dw:212016 dr:125 al:71 bm:0 lo:0 pe:0 ua:0 ap:0 [dionysos]-root# /etc/init.d/drbd status drbd driver loaded OK; device status: version: 0.7.11 (api:77/proto:74) SVN Revision: 1807 build by bachbuilder@g77.physik.fu-berlin.de, 2006-01-07 02:56:10 0: cs:Connected st:Secondary/Primary ld:Consistent ns:0 nr:212016 dw:212016 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 6) Unmounting the file system [matisse]-root# umount /mnt/raid [matisse]-root# /etc/init.d/drbd status drbd driver loaded OK; device status: version: 0.7.11 (api:77/proto:74) SVN Revision: 1807 build by bachbuilder@g77.physik.fu-berlin.de, 2005-12-14 13:50:28 0: cs:Connected st:Primary/Secondary ld:Consistent ns:212068 nr:0 dw:212068 dr:125 al:71 bm:0 lo:0 pe:0 ua:0 ap:0 [dionysos]-root# /etc/init.d/drbd status drbd driver loaded OK; device status: version: 0.7.11 (api:77/proto:74) SVN Revision: 1807 build by bachbuilder@g77.physik.fu-berlin.de, 2006-01-07 02:56:10 0: cs:Connected st:Secondary/Primary ld:Consistent ns:0 nr:212068 dw:212068 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 7) matisse secondary, dionysos primary [matisse]-root# drbdsetup /dev/drbd0 secondary [dionysos]-root# drbdsetup /dev/drbd0 primary [dionysos]-root# /etc/init.d/drbd status drbd driver loaded OK; device status: version: 0.7.11 (api:77/proto:74) SVN Revision: 1807 build by bachbuilder@g77.physik.fu-berlin.de, 2006-01-07 02:56:10 0: cs:Connected st:Primary/Secondary ld:Consistent ns:0 nr:212068 dw:212068 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 [matisse]-root# /etc/init.d/drbd status drbd driver loaded OK; device status: version: 0.7.11 (api:77/proto:74) SVN Revision: 1807 build by bachbuilder@g77.physik.fu-berlin.de, 2005-12-14 13:50:28 0: cs:Connected st:Secondary/Primary ld:Consistent ns:212068 nr:0 dw:212068 dr:125 al:71 bm:77 lo:0 pe:0 ua:0 ap:0 8) Mounting the filesystem on dionysos [dionysos]-root# mount /dev/drbd0 /mnt/raid And now dionysos never mount /dev/drbd0. dionysos is alive and working, but, I can't kill "mount /dev/drbd0 ..." The only possibilitie is to reboot dionysos. Status on matisse: [matisse]-root# /etc/init.d/drbd status drbd driver loaded OK; device status: version: 0.7.11 (api:77/proto:74) SVN Revision: 1807 build by bachbuilder@g77.physik.fu-berlin.de, 2005-12-14 13:50:28 0: cs:Connected st:Secondary/Primary ld:Consistent ns:212068 nr:0 dw:212068 dr:125 al:71 bm:77 lo:0 pe:0 ua:0 ap:0