The docs are somewhat misleading as the 'mount' describes the mounting of the device during start of the driver (devb-eide, devb-ahci, devb-xxx), not mounting the filesystems with explicit 'mount' calls.
NOTE:
This entry has been validated against the SDP version listed above. Use
caution when considering this advice for any other SDP version. For
supported releases, please reach out to QNX Technical Support if you have any questions/concerns.