def exists():
if env():<EOL><INDENT>cij.err("<STR_LIT>")<EOL>return <NUM_LIT:1><EOL><DEDENT>nvme = cij.env_to_dict(PREFIX, EXPORTED + REQUIRED)<EOL>cmd = ["<STR_LIT>", "<STR_LIT>", nvme["<STR_LIT>"], "<STR_LIT>"]<EOL>rcode, _, _ = cij.ssh.command(cmd, shell=True, echo=False)<EOL>if rcode:<EOL><INDENT>return False<EOL><DEDENT>return True<EOL>
Verify that the ENV defined NVMe device exists