Scale Up
To find what volumes are mounted execute the df command in a bash terminal or SSH connection.
df
This should give the location of all mount points and volumes in the filesystem. From the below output it can be seen that the /hana/data volume is where the SAP HANA data volume is mounted to.
Filesystem 1K-blocks Used Available Use% Mounted on
devtmpfs 2377876496 0 2377876496 0% /dev
tmpfs 3568402432 32 3568402400 1% /dev/shm
tmpfs 2377886844 12376 2377874468 1% /run
tmpfs 2377886844 0 2377886844 0% /sys/fs/cgroup
/dev/mapper/3624a9370c49a4cb0e2944f440002d735-part2 62883840 18675356 44208484 30% /
/dev/mapper/3624a9370c49a4cb0e2944f440002dc76 536608768 44161756 492447012 9% /hana/shared
tmpfs 475577368 24 475577344 1% /run/user/469
tmpfs 475577368 0 475577368 0% /run/user/468
tmpfs 475577368 0 475577368 0% /run/user/0
/dev/mapper/3624a93701b16eddfb96a4c3800011c30 5366622188 583411380 4783210808 11% /hana/data
/dev/mapper/3624a93701b16eddfb96a4c3800011c31 1073217536 550628920 522588616 52% /hana/log
fileserver.puredoes.local:/mnt/nfs/HANA_Backup 524032000 142322688 381709312 28% /hana/backup
Once the location has been found, use the umount command to unmount the volume:
umount /hana/data The /hana/data volume should no longer be shown when executing df once again:
Filesystem 1K-blocks Used Available Use% Mounted on
devtmpfs 2377876496 0 2377876496 0% /dev
tmpfs 3568402432 32 3568402400 1% /dev/shm
tmpfs 2377886844 12376 2377874468 1% /run
tmpfs 2377886844 0 2377886844 0% /sys/fs/cgroup
/dev/mapper/3624a9370c49a4cb0e2944f440002d735-part2 62883840 18675192 44208648 30% /
/dev/mapper/3624a9370c49a4cb0e2944f440002dc76 536608768 44161756 492447012 9% /hana/shared
tmpfs 475577368 24 475577344 1% /run/user/469
tmpfs 475577368 0 475577368 0% /run/user/468
tmpfs 475577368 0 475577368 0% /run/user/0
/dev/mapper/3624a93701b16eddfb96a4c3800011c31 1073217536 550628920 522588616 52% /hana/log
fileserver.puredoes.local:/mnt/nfs/HANA_Backup 524032000 142345216 381686784 28% /hana/backup
Scale Out
Each worker node in the Scale Out landscape will have an SAP HANA data volume attached to it. The Storage API connector will also automatically connect data volumes to standby nodes in the event of a worker node failing. What this means is that any data volume could be attached to any node at any point in time.
It is recommended to connect to each node, including standby nodes, in the scale out landscape the ascertain where the data volumes are connected to. Running the df command on each node will give the required mount point information.
df Node 1
From the output of Node 1 it can be seen that the SAP HANA Data volume is mounted at /hana/data/SH1/mnt0001.
Filesystem 1K-blocks Used Available Use% Mounted on
devtmpfs 264013600 0 264013600 0% /dev
tmpfs 397605660 4 397605656 1% /dev/shm
tmpfs 264021864 10432 264011432 1% /run
tmpfs 264021864 0 264021864 0% /sys/fs/cgroup
/dev/sdy2 62883840 14807788 48076052 24% /
fileserver.puredoes.local:/mnt/nfs/SHN_Shared 524032000 153831424 370200576 30% /hana/shared
fileserver.puredoes.local:/mnt/nfs/SHN_Backup 524032000 153831424 370200576 30% /hana/backup
tmpfs 52804372 24 52804348 1% /run/user/469
tmpfs 52804372 0 52804372 0% /run/user/468
tmpfs 52804372 0 52804372 0% /run/user/0
/dev/mapper/3624a9370884890ea83bd488200011c47 536608768 110732156 425876612 21% /hana/data/SH1/mnt00001
/dev/mapper/3624a9370884890ea83bd488200011c4a 402456576 95926824 306529752 24% /hana/log/SH1/mnt00001
Node 2
From the output of Node 2 it can be seen that the SAP HANA Data volume is mounted at /hana/data/SH1/mnt0002.
Filesystem 1K-blocks Used Available Use% Mounted on
devtmpfs 264013600 0 264013600 0% /dev
tmpfs 397605660 4 397605656 1% /dev/shm
tmpfs 264021864 10436 264011428 1% /run
tmpfs 264021864 0 264021864 0% /sys/fs/cgroup
/dev/sdy2 62883840 14570096 48313744 24% /
Fileserver.puredoes.local:/mnt/nfs/SHN_Backup 524032000 153831424 370200576 30% /hana/backup
Fileserver.puredoes.local:/mnt/nfs/SHN_Shared 524032000 153831424 370200576 30% /hana/shared
tmpfs 52804372 24 52804348 1% /run/user/469
tmpfs 52804372 0 52804372 0% /run/user/468
tmpfs 52804372 0 52804372 0% /run/user/0
/dev/mapper/3624a9370884890ea83bd488200011c48 536608768 113832192 422776576 22% /hana/data/SH1/mnt00002
/dev/mapper/3624a9370884890ea83bd488200011c4b 402456576 112637136 289819440 28% /hana/log/SH1/mnt00002
Node 3
From the output of Node 3, it can be seen that the SAP HANA Data volume is mounted at /hana/data/SH1/mnt0003.
Filesystem 1K-blocks Used Available Use% Mounted on
devtmpfs 264013600 0 264013600 0% /dev
tmpfs 397605660 4 397605656 1% /dev/shm
tmpfs 264021864 10436 264011428 1% /run
tmpfs 264021864 0 264021864 0% /sys/fs/cgroup
/dev/sdy2 62883840 14570832 48313008 24% /
Fileserver.puredoes.local:/mnt/nfs/SHN_Backup 524032000 153834496 370197504 30% /hana/backup
Fileserver.puredoes.local:/mnt/nfs/SHN_Shared 524032000 153834496 370197504 30% /hana/shared
tmpfs 52804372 20 52804352 1% /run/user/469
tmpfs 52804372 0 52804372 0% /run/user/468
tmpfs 52804372 0 52804372 0% /run/user/0
/dev/mapper/3624a9370884890ea83bd488200011c49 536608768 113978852 422629916 22% /hana/data/SH1/mnt00003
/dev/mapper/3624a9370884890ea83bd488200011c4c 402456576 112637136 289819440 28% /hana/log/SH1/mnt00003Node 4
From the output of Node 4, it can be seen that there is no data or log volume, making this a standby node in the scale out landscape.
Filesystem 1K-blocks Used Available Use% Mounted on
devtmpfs 264013600 0 264013600 0% /dev
tmpfs 397605660 4 397605656 1% /dev/shm
tmpfs 264021864 10308 264011556 1% /run
tmpfs 264021864 0 264021864 0% /sys/fs/cgroup
/dev/sdz2 62883840 14540732 48343108 24% /
Fileserver.puredoes.local:/mnt/nfs/SHN_Backup 524032000 153834496 370197504 30% /hana/backup
Fileserver.puredoes.local:/mnt/nfs/SHN_Shared 524032000 153834496 370197504 30% /hana/shared
tmpfs 52804372 20 52804352 1% /run/user/469
tmpfs 52804372 0 52804372 0% /run/user/468
tmpfs 52804372 0 52804372 0% /run/user/0
Once all of the data volume mount points and node locations have been identified, they need to be unmounted using the umount command.
Node 1
umount /hana/data/SH1/mnt0001Node 2
umount /hana/data/SH1/mnt0002
Node 3
umount /hana/data/SH1/mnt0002