Fedora 16 boots slow because of extra swap line in /etc/fstab

[Jeff72]

I thought I would post something I noticed with one of my systems booting slow with Fedora 16. My system booted very fast with Fedora 15 before and I was seeing much slower boot times with Fedora 16.

I saw this "failed" message in my /var/log/boot.log-20111204 file:
# grep -i fail /var/log/boot.log-20111204
Starting /dev/disk/by-uuid/c6d5573f-87c2-4ce4-b497-5bf314800688 aborted because a dependency failed.

It turns out, that c6d5573f-87c2-4ce4-b497-5bf314800688 number was for my swap partition entry in /etc/fstab. For some reason I had 2 different swap entries in my /etc/fstab file, like so:
# grep swap /etc/fstab
/dev/mapper/vg_w2-lv_swap swap swap defaults 0 0
UUID=c6d5573f-87c2-4ce4-b497-5bf314800688 swap swap defaults 0 0

I commented the extra line with the UUID entry in /etc/fstab like so:
# grep swap /etc/fstab
/dev/mapper/vg_w2-lv_swap swap swap defaults 0 0
#UUID=c6d5573f-87c2-4ce4-b497-5bf314800688 swap swap defaults 0 0

This change made my system boot much faster. Something to consider if your system is booting slow with Fedora 16 and was booting fast with Fedora 15.

[David Batson]

Any invalid UUID number in fstab can result in a slow boot. I had recreated my SWAP partition on an third Linux OS install which changed the UUID number for it in Fedora. Like you, I noticed Fedora booting noticeably slower than before.

You can run blkid to find the current UUID numbers for your partitions, and edit fstab accordingly.

[diamond_ramsey]

Originally Posted by David Batson

Any invalid UUID number in fstab can result in a slow boot. I had recreated my SWAP partition on an third Linux OS install which changed the UUID number for it in Fedora. Like you, I noticed Fedora booting noticeably slower than before.

You can run blkid to find the current UUID numbers for your partitions, and edit fstab accordingly.

+1 for blkid and verifying the UUID entry(ies) within fstab.

[usador]

This same happened to me. I have 2 swap partitions.
As root:

swapoff /dev/"ofending partition"
mkswap /dev/"ofending partition"
swapon /dev/"ofending partition"

Crude, but worked.

Hope this helps.