[DRBD-user] Failure: (114) Lower device is already claimed. This usually means it is mounted. WTF?

Tomasz Chmielewski mangoo at wpkg.org
Thu Jan 10 13:37:14 CET 2008

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

Martin Gombac schrieb:
> maybe:
> lsof | grep "/dev/mapper"

No, lsof doesn't only shows files (or similar) used by programs, it 
won't show show block devices used by the kernel (i.e. mounted, used by 
swap etc.).
Some information could be fetched from /sys (which module uses a given 
block device).

The issue has something to do with multipath in device mapper (over 
which DRBD is used here).

I found a workaround, but I don't know the full story yet.

Will keep the list updated...

Tomasz Chmielewski

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