# lsblk
...
vdc disk
└─cas1-1 disk /tmp/mnt2
vdd disk
└─cas1-2 disk
├─cas1-2p1 part
├─cas1-2p2 part /tmp/mnt1
├─cas1-2p3 part
└─cas1-2p4 part /tmp/mnt3
# casadm -L
type id disk status write policy device
cache 1 /dev/vdb Running wt -
├core 1 /dev/vdc Active - /dev/cas1-1
└core 2 /dev/vdd Active - /dev/cas1-2
# casadm -T -i 1
Can't stop cache instance 1 due to mounted devices:
/dev/cas1-2p2
/dev/cas1-1
/dev/cas1-2p4
# casadm -R -i 1 -j 1
Can't remove core 1 from cache 1 due to mounted devices:
/dev/cas1-1
# casadm -R -i 1 -j 2
Can't remove core 2 from cache 1 due to mounted devices:
/dev/cas1-2p2
/dev/cas1-2p4
resolves https://github.com/Open-CAS/open-cas-linux/issues/1515
Output after modifications: