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sherpaurgen
Asked: 2021-11-25 07:53:13 +0800 CST

Issue with customizing kernel cmdline option in Ubuntu 20.04.3

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Im trying to add rootdelay=60 option in grub cmdline options by editing file /etc/default/grub as

GRUB_CMDLINE_LINUX_DEFAULT="rootdelay=300" and also ran update-grub update-initramfs -u however i do not observe any delay after reboot and the root filesystem mounts right away

i can see that the rootdelay=300 is present in cat /proc/cmdline ,is there any thing missing here ?

ubuntu grub

1 Answers

  1. rootdelay only waits until the rootfs device is available.

    The kernel documentation is not very concise:

    https://www.kernel.org/doc/html/v4.14/admin-guide/kernel-parameters.html

    however, there is an answer on the Unix stackexchange that provides additional explanation:

    https://unix.stackexchange.com/questions/67199/whats-the-point-of-rootwait-rootdelay

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