[DRBD-user] /proc/drbd shows wo:n is this dangerous ?

Ronal Andadinata randadinata at gmail.com
Thu Dec 5 06:49:15 CET 2013

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


After running through the doc i noticed that wo:n is actually dangerous, i tried to correct them using 
drbdsetup disk-options 1 --disk-flushes --disk-barrier --disk-drain

But still the status on /proc/drbd shows wo:n

Basic info :
DRBD compiled from tagged git release on Citrix Xenserver 6.2 kernel

[root at xs1 ~]# uname -a
Linux xs1 #1 SMP Thu Aug 15 00:31:41 EDT 2013 i686 athlon i386 GNU/Linux

[root at xs1 ~]# cat /proc/drbd
version: 8.4.3 (api:1/proto:86-101)
GIT-hash: 89a294209144b68adb3ee85a73221f964d3ee515 build by root at localhost.localdomain, 2013-11-27 04:51:13

 1: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r-----
    ns:0 nr:11778580 dw:11778580 dr:0 al:0 bm:253 lo:0 pe:0 ua:0 ap:0 ep:1 wo:n oos:0

[root at xs1 ~]# drbdsetup 1 show
resource iscsi1 {
    options {
    net {
        sndbuf-size             524288; # bytes
        cram-hmac-alg           "md5";
        shared-secret           "mydeepestsecret";
        after-sb-0pri           discard-zero-changes;
        after-sb-1pri           consensus;
    _remote_host {
        address                 ipv4;
    _this_host {
        address                 ipv4;
        volume 0 {
            device                      minor 1;
            disk                        "/dev/disk/by-id/scsi-SATA_WDC_WD2002FAEX-_WD-WCAY01205209-part3";
            meta-disk                   internal;
            disk {
                fencing                 resource-only;
                disk-barrier            yes;
                resync-rate             102400k; # bytes/second
                al-extents              6433;
                disk-timeout            100; # 1/10 seconds
[root at xs1 ~]#

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