Le Thu, 28 Sep 2017 12:36:39 +1300
Ewen McNeill [off-list ref] écrivait:

I'm obviously not an expert in filesystem layout optimisation.  But I 
have many years sysadmin experience dealing with lots of types of 
storage, and can write a couple of pages of text on the "background" 
bits next time I have a free moment.  The more advanced tunables
could remain "todo" until there's time for the perfect version...

As you're at it, please mention the potential problems with 512e (512
bytes blocks emulated) disks, which are the vast majority of shipped
disks nowadays. Doing RAID with these can lead to all sort of trouble
by worsening the read/modify/write problem.

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