buster finishing installation takes long

[Chrisdb]

At last I managed to reduce the realtime to about 5s

I changed the mount options of my partition to:

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rw,relatime

I guess there's no option to use these mount options during installation?

[phenest]

There certainly is. I specify noatime and nodiratime at installation.

[Chrisdb]

There certainly is. I specify noatime and nodiratime at installation.

Do you mean the graphical installer? During which step?

[phenest]

I've never used the graphical installer, but it does on the text based installer.

[Chrisdb]

I've never used the graphical installer, but it does on the text based installer.

I found it, but the install time took about 1 hour again
Seems like the options for the mount only take effect after installation?

[Chrisdb]

At last I found a solution

When I run the installer I have to set the mount options to: relatime,barrier=0
(note: setting barrier is only possible in expert mode)

More info can be found here:
https://superuser.com/questions/610827/ ... ng-install

I only use the 'barrier' option during installation, afterwards this setting is removed.

[phenest]

Nice find, Chris. I wasn't aware of barrier.
Is there any impact on performance removing barrier=0 afterwards?

[Chrisdb]

Nice find, Chris. I wasn't aware of barrier.
Is there any impact on performance removing barrier=0 afterwards?

Sad to say, but this workaround is not an option
As stated on several sites:

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if the system does not have battery-backed disks, there is a risk of file system corruption

I'm going to experiment with some other options...(noatime instead of relatime, commit interval, ...)