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Pointer to variable that will the receive return error code from this function:
FS_ERR_NONE
Device low-level unmounted successfully.
FS_ERR_NAME_NULL
Argument name_dev passed a NULL pointer.
FS_ERR_DEV_INVALID
Argument name_dev specifies an invalid device
FS_ERR_DEV_NOT_OPEN
Device is not open.
FS_ERR_DEV_NOT_PRESENT
Device is not present.
FS_ERR_DEV_IO
Device I/O error.
FS_ERR_DEV_TIMEOUT
Device timeout.
Returned Value
None.
Notes/Warnings
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