[DRBD-user] DRBD configuration

Andy Tornquist atornquist at pccwglobal.com
Fri Mar 10 16:14:33 CET 2006

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

What does an lsmod show? Is drbd loaded?  What version of the kernel are you
running? What library is your kernel module in.


From: drbd-user-bounces at linbit.com [mailto:drbd-user-bounces at linbit.com] On
Behalf Of ejazahmad.khan at wipro.com
Sent: Friday, March 10, 2006 1:26 AM
To: Lars.Ellenberg at linbit.com; drbd-user at linbit.com
Subject: [DRBD-user] DRBD configuration

Hi Ellenberg,

I will be very thankful if you please help me to resolve my query.

I have installed & configured drbd-0.7.16 on two systems. When trying to
start the drbd by issuing command "/etc/init.d/drbd start" I am getting this
"Starting DRBD resources: Can not load the drbd module." I have created the
device node by command "for i in `seq 0 15` ; do mknod -m 0660 /dev/drbd$i b
147 $i; done". My only suspect why its not working is, if we can any way
create device node perfectly then I hope we can resolve the problem.

Please find the configuration details below.

linux:/sbin # uname -a
linux linux 2.6.9 #2 Mon Feb 27 16:12:31 PST 2006 i686 i686 i386 GNU/Linux

vi /etc/fstab
/dev/hde3            /                    reiserfs   acl,user_xattr        1
/dev/hde1            /windows/C           ntfs
ro,users,gid=users,umask=0002,nls=utf8 0 0
/dev/hde2            /windows/D           vfat
users,gid=users,umask=0002,iocharset=utf8 0 0
/dev/hde5            swap                 swap       pri=42                0
devpts               /dev/pts             devpts     mode=0620,gid=5       0
proc                 /proc                proc       defaults              0
sysfs                /sys                 sysfs      noauto                0
/dev/dvdrecorder     /media/dvdrecorder   subfs
fs=cdfss,ro,procuid,nosuid,nodev,exec,iocharset=utf8 0 0
/dev/drbd0           /repl                ext2       defaults              0

linux:/etc/init.d # ls -a /dev/drbd*
/dev/drbd0  /dev/drbd10  /dev/drbd12  /dev/drbd14  /dev/drbd2  /dev/drbd4
/dev/drbd6  /dev/drbd8
/dev/drbd1  /dev/drbd11  /dev/drbd13  /dev/drbd15  /dev/drbd3  /dev/drbd5
/dev/drbd7  /dev/drbd9
linux:/usr/src/linux # df -ah
Filesystem            Size  Used Avail Use% Mounted on
/dev/hde3              12G  6.8G  5.0G  58% /
proc                     0     0     0   -  /proc
tmpfs                 220M   36K  220M   1% /dev/shm
devpts                   0     0     0   -  /dev/pts
none                     0     0     0   -  /proc/sys/fs/binfmt_misc
usbfs                    0     0     0   -  /proc/bus/usb
linux:/sbin # drbdadm up all
can not open /dev/drbd0: No such device or address
Command 'drbdsetup /dev/drbd0 disk /dev/hde3 internal -1
--on-io-error=panic' terminated with exit code 20

vi /etc/drbd.conf
# please have a a look at the example configuration file in
# /usr/share/doc/packages/drbd.conf

resource wimax {
  protocol      B;
  incon-degr-cmd "halt -f";
  disk {
         on-io-error panic;
  syncer {
    rate        10M;
  on linux { 
    device      /dev/drbd0;
     disk       /dev/hde3;                               
    meta-disk   internal;
  on xyz {
    device      /dev/drbd0;
    disk        /dev/hda3;
    meta-disk   internal;
linux:/usr/src/drbd-0.7.16 # cat /proc/drbd
    cat: /proc/drbd: No such file or directory
linux:/etc/init.d # ./drbd start
Starting DRBD resources:    Can not load the drbd module.
linux:/etc/init.d # ./drbd force-reload
Restarting all DRBD resourcescan not open /dev/drbd0: No such device or
Command '/sbin/drbdsetup /dev/drbd0 down' terminated with exit code 20
drbdsetup exited with code 20
ERROR: Module drbd does not exist in /proc/modules
Can not load the drbd module.
linux:/usr/src/linux # drbdsetup /dev/drbd0 disk /dev/hde3 internal -1
can not open /dev/drbd0: No such device or address
linux:/sbin # cat /proc/drbd
cat: /proc/drbd: No such file or directory

I have used command "for i in `seq 0 15` ; do mknod -m 0660 /dev/drbd$i b
147 $i; done" to create device node. but when I use "ls" it shows but when I
use command "df -ah" or "lsmod" it is not showing. I need your help ...

Thanks & Regards      
Ejaz Ahmad

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