What is the command to see the membership directory to a specific drive?

I have the server ready prepared by other people. 2 disks in RAID1 and 2 disks in RAID1.
How can I see which disk is the catalog? For example /var/lib/pgsql, I need to put on another drive if it is the same where the OS, otherwise it will strong download. How to see which drive is this folder?
March 19th 20 at 08:38
1 answer
March 19th 20 at 08:40
df-h directory path

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