[DRBD-user] Adding volume to an existing resource results in "IO error"

[曾德清]

Hello,
I deployed my drbd resource on four nodes, one diskless node of the four is
primary.
To reduce the number of kernel threads, I add new volume to existing
resource which is in use.
However I got IO errors of volume which is test with fio iops write, does
drbd support this way of use?
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