Why use uuid in fstab

Most mkfs. You can create a new file system and with the old UUID. Atom topic feed. Arch Linux. Index Rules Search Register Login. You are not logged in. Topics: Active Unanswered. There's at least one situation where UUIDs are less useful: if you clone an entire disk, then reboot, you may get partitions mounting from either disk, or the wrong disk.

That's true - check the linked blog post, it even has a section when not to use them. If you clone the disk you should change the UUID on the new disk. Add a comment. Please see the updated question if you haven't.

Rather than asking in an update, you should ask that as a separate question "Why is my mounted partition UUID different than the one in fstab? On my x86, fairly up-to-date Arch linux server, man fstab gives me this: The second field Bruce Ediger Bruce Ediger Please see the question one more time.

If I answered the original question, it might be a good idea to mark it "answered" and write a new question, just so you don't collect irrelevant answers, answers that work with the original and not the modified question. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.

The Overflow Blog. BB code is On. Smilies are On. All times are GMT The time now is AM. Twitter: linuxquestions. Open Source Consulting Domain Registration. Visit Jeremy's Blog. Search Blogs. Mark Forums Read. Any reason to use UUIDs to in fstab? User Name. Remember Me? Slackware This Forum is for the discussion of Slackware Linux. View Public Profile. View Review Entries. Find More Posts by Altiris. Find More Posts by astrogeek. As part of the hotplug system, udev is executed if a device is added to or removed from the system.

A list of rules is used to match against specific device attributes. The udev tools examine every appropriate block device that the kernel creates to apply naming rules based on certain buses, drive types, or file systems. For information about how to define your own rules for udev , see Writing udev Rules.

A UUID Universally Unique Identifier is a bit number for a file system that is unique on both the local system and across other systems. It is a randomly generated with system hardware information and time stamps as part of its seed.