[DRBD-user] DRBD9 not syncing permanently??

Rudolf Kasper rkasper at sonog.de
Thu Jan 21 11:59:12 CET 2016

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


i got a question. We've got a setup with three nics. One of them is 
cross-over and only for drbd use. So i expect that we can replicate 
120M/s over this nic constantly. But when i transfer some files to the 
drbd device i see sometimes traffic on the device and sometimes not.  I 
got a adaptec 6405 and write-caching is disabled so this couldn't be the 
clue. OS is debian 8. When i'm looking into iotop i can see total disk 
write, but only sometimes there is a peak of actual disk write, after 
this peak the nic generates traffic.

Is there a disk-cache running? How can i check this and disable it?

kind regards


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