verify if hal-device has 2 volumes, then use it. Howto?

[Peter v/d Heide]

Hello all,

Is there a possibility to check with hal if, for example an USB-stick,
is completely
ready (for using)?

Reason is that I want to ensure if there are 2 volumes on the USB-stick.
If that is verified,
I can use the stick, otherwise, I cannot. The problem is that I can wait
for both volumes, but I don't know
how long to wait if they are not there.

Maybe you can help me how to fix this. I've already asked this question
a long time ago but I get no response, so I thought, let's try here again.
A suggestion then (from Artem Kachitchkin) was a  "info.scan_state"
property, with values 'in_progress' and 'done'. This could help for a
solution
to the problem. Until now I've never seen this property. Is it work in
progress? Or are there maybe other suggestions?

I want to solve this problem on a descent way, not with some kind of
workaround (with timer or something like that).

Thanks in advance.

Best regards,

Peter
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