Comment # 2 on bug 1120608 from Michele Cherici

(In reply to Thomas Blume from comment #1)
> (In reply to Michele Cherici from comment #0)
> > I have an openSUSE Tumbleweed system with this hard disk setup:
> > 
> > - SSD disk with Tumbleweed
> > - Seagate BarraCuda ST3320620AS 320G with two partition for data (not
> > mounted)
> > 
> > Mounting or unmounting an external USB disk with udisks2 version 2.7.6
> > causes internal disk (ST3320620AS) to spin-up from standby.
> > It happens using a file manager like KDE Dolphin or from command line with
> > udisksctl.
> > Mounting the external USB disk with standard mount command instead works and
> > the internal disk does not wakeup from standby.
> > Downgrading udisks2 to 2.6.5 version (I've used the package from Leap for
> > the test) solves the problem.
> 
> Hm, I'm not really sure how a mount command can work without spinning up the
> root disk.
> When executing the mount command, it loads some shared libraries and unless
> they are already in memory, they need to be fetched from the root disk, so
> it needs to spin up.
> Could you provide straces from the mount with udisks2 version 2.7.6 and
> version 2.6.5?

The disk that spin up is not the root disk, the OS is installed into the SSD
disk (sda), the disk that wake up from standby is the other one (sdb), it's a
Seagate BarraCuda ST3320620AS and it contains two partitions that are not
mounted.

Seagate disk is configured to spin down with a systemd service:

[Unit]
Description=Set disks sleep timeout
After=default.target hibernate.target suspend.target hybrid-sleep.target

[Service]
Type=oneshot
ExecStart=-/sbin/hdparm -S 60 /dev/disk/by-id/ata-ST3320620AS_5QF177F6

[Install]
WantedBy=default.target hibernate.target suspend.target hybrid-sleep.target


This is my fstab:

UUID=ea3f74c0-56aa-4c13-b9c2-23ca4f0b2a3a  /                ext4 
acl,user_xattr,discard,noatime  1  1
UUID=e070dea7-88d5-4cfd-9656-e016fd739b03  swap             swap  discard      
                  0  0
UUID=3d386d3d-dc36-4f78-86ca-a0be410bf430  /opensuse-clone  ext4 
acl,user_xattr,discard,noatime  1  2
UUID=05f70c43-420f-4a49-806b-b5e7ec11bffc  /opensuse-alt    ext4 
user,noauto,acl,user_xattr,exec,dev,suid  1  2
UUID=94eda58b-133a-4a8b-ad2a-3c76a1ac1c60  /disco-B         ext4 
user,noauto,acl,user_xattr,data=ordered,exec,dev,suid  0  2


Partitions / swap and /opensuse-clone are on sda (SSD disk), instead
/opensuse-alt and /disco-B are on sdb (Seagate disk, the one that spin up).

/disco-B is an encripted partition but I think this has no impact on this
specific bug, anyway the content of crypttab is:

cr_ata-ST3320620AS_5QF177F6-part1  UUID=3eb902ac-7f47-4499-b0bd-faac662bfe39 
none  noauto,nofail


If I insert an USB disk it is mapped to sdc and if I try to mount it with

udisksctl mount -b /dev/sdc1

then the Seagate disk wake up.

If I repeat the same operation (awaiting that the Seagate disk spin down after
the usual timeout) and try to mount with

mount /dev/sdc1 /mnt/

than the Seagate disk remain in suspend status and do not spin up.