Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hi everybody,
on a single-primary setup the master looses connection to slave system
from time to time. It always complains about "bad barrier" like
dmesg (primary)
[181517.023255] d-con sda4: BAD! BarrierAck #1001121 received, expected
#1001120!
[181517.093355] d-con sda4: peer( Secondary -> Unknown ) conn( Connected
-> ProtocolError ) pdsk( UpToDate -> DUnknown )
After that drbd reconnects automatically and goes back to
up2date/up2date state again.
We have checked everything like mainboard bios, nic firmware, different
nics, cables and settings without any change to the behavior.
Both systems are running Kernel 3.10.30+67-ph and drbd module version
8.4.3 and use drbd.conf below.
Please shed some light what else could cause "bad barrier" messages.
Maybe there is anyhing wrong with the current drbd.conf?
Thanks in advance,
Philipp
+-------------------------------------------------------------------+
global {
usage-count no;
}
resource "sda4" {
protocol B;
handlers {
pri-on-incon-degr "echo o > /proc/sysrq-trigger ; halt -f";
pri-lost-after-sb "echo o > /proc/sysrq-trigger ; halt -f";
local-io-error "echo o > /proc/sysrq-trigger ; halt -f";
}
startup {
degr-wfc-timeout 120;
wfc-timeout 300;
}
disk {
on-io-error call-local-io-error;
no-disk-flushes;
no-md-flushes;
no-disk-drain;
no-disk-barrier;
}
net {
max-buffers 8000;
max-epoch-size 8000;
unplug-watermark 2048;
# auto-detect sndbuf-size
sndbuf-size 0;
after-sb-0pri discard-older-primary;
after-sb-1pri discard-secondary;
after-sb-2pri disconnect;
rr-conflict call-pri-lost;
}
syncer {
rate 500M;
al-extents 2539;
}
on master {
device /dev/drbd0;
disk /dev/disk/by-id/scsi-SAdaptec_RAID1_SSD_SATA_154A0228-part4;
address 192.168.255.1:7788;
meta-disk internal;
}
on slave {
device /dev/drbd0;
disk /dev/disk/by-id/scsi-SAdaptec_RAID1_SSD_SATA_47B792A8-part4;
address 192.168.255.2:7788;
meta-disk internal;
}
}
+-------------------------------------------------------------------+
--
Mit freundlichen Grüßen
Philipp Herz
Ihr Profihost Team
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