No drive letters

QNX SDP8.0User's GuideUser

Unlike Microsoft Windows, which represents drives as letters that precede pathnames (e.g., C:\), QNX OS represents disk drives as regular directories within the pathname space. Directories that access another filesystem, such as one on a second hard disk partition, are called mountpoints.

Usually the primary disk-based filesystem is mounted at / (the root of the pathname space). A full QNX OS installation mounts all additional disk filesystems automatically under the /fs directory. For example:
/fs directory

So, while in a DOS-based system a second partition on your hard drive might be accessed as D:\, in a QNX OS system you might access the second Power-Safe filesystem partition on the first hard drive as /fs/hd0-qnx6-2.

For more information on where to find things in a typical QNX OS pathname space, see Where everything is stored, later in this chapter. To learn more about mounting filesystems, see Working with Filesystems.

Page updated: