Maybe a bug with the standby timer / sleep mode timer for HDDs

Hello,

the standby timer for HDDs may be a little bit broken.
It works fine if I set it to 8 minutes or less.
If I set it 10 minutes or above the timer does not send the HDDs into standby / sleep mode any more.
I tested also 12, 15 and 20 minutes. Every time above 10 minutes does not work.
The HDDs are two Samsung Spinpoint HDDs, just for Data.
There are no active programs on them and it does not matter, if the HDDs are mounted or not. In both cases it is the same behavior.
It has been like this since installation, so I don't think that other software is interfering the timer process.
Maybe you have already fixed it in a newer version, but I just wanted to tell you this behavior.
I use gnome-disk-utility 3.36.3-0ubuntu1 on Ubuntu 20.04.3 LTS Release: 20.04.

Thanks for your attention and your great work.

Kind regards
Chris

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gnome-disk-utility 3.36.3-0ubuntu1
ProcVersionSignature: Ubuntu 5.11.0-37.41~20.04.2-generic 5.11.22
Uname: Linux 5.11.0-37-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.20
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sat Oct 9 21:31:39 2021
InstallationDate: Installed on 2021-09-16 (22 days ago)
InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819)
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-disk-utility
UpgradeStatus: No upgrade log present (probably fresh install)