does 'noatime' make sense for a read-only filesystem?

Question

mount -o remount,ro,noatime

As the title says - if the filesystem is actually read-only, does noatime have any affect?

ktf · Answer 1 · 2011-10-20 11:18:51Z

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Answer: No :-)

answered Oct 20 '11 at 11:18

ktf
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	I see, if you do not mind me asking - source on that? – gng Oct 20 '11 at 11:19
	My experience :-) No, really: `ro` means NO writes at all. Everything else may safely considered as bug. – ktf Oct 20 '11 at 11:23
	I'm not sure about that. It might that VFS handles noatime somehow different. A little bit of google search shows lots of people using both at the same time, but I couldn't get any source about why doing it or not, neihter in the man pages. – Jens Erat Oct 20 '11 at 11:53
	On my system the man page stated `ro` means "read-only" (phew, lucky me). Adding `noatime` to `ro` helps as much as finger-crossing: Will do no harm! – ktf Oct 20 '11 at 13:05

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