GPFS
https://www.ira.inaf.it/Computing/tecnica/GPFS/GPFS_31_Planning_Install.pdf
https://www.ibm.com/support/knowledgecenter/STXKQY_4.2.0/com.ibm.spectrum.scale.v4r2.adm.doc/bl1adm_mmadddisk.htm
mmlsnsd -F
mmlsnsd
mmlsnsd -M: Maps the NSD names to its disk device name on all nodes. (slow)
mmlsnsd -m: Maps the NSD name to its disk device name on the local node and, if applicable, on the NSD server nodes.
mmlsfs
mmcrvsd - output
mmcrnsd - tworzenie nsd
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