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ckliborn
Asked: 2012-01-04 18:09:54 +0800 CST

How can I add the "noatime" flag to my / filesystem without a reboot

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Would the remount command do it if I add the option in /etc/fstab?

Is this this a good idea?

linux filesystems fstab

3 Answers

  1. Yes, it would work.
    Or you can manually add it like:

    mount -o remount,noatime /dev/sd0 /mnt
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  2. Edit /etc/fstab and add the proper noatime entry to your / filesystem entry.

    Remount the / filesystem with:

    mount -o remount,noatime /

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  3. Best Answer

    Not anymore. -o remount,noatime was an effective method of disabling atime without a reboot.

    I don't know that I'd say it's a good idea, but if you intend to turn atime off, I don't see what it would be a bad idea either if you have an old enough kernel. According to the man page for mount:

    MS_REMOUNT

    The following mountflags can be changed: MS_RDONLY, MS_SYNCHRONOUS, MS_MANDLOCK; before kernel 2.6.16, the following could also be changed: MS_NOATIME and MS_NODIRATIME; and, additionally, before kernel 2.4.10, the following could also be changed: MS_NOSUID, MS_NODEV, MS_NOEXEC.

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