[Virtual-pkg-base-maintainers] Bug#791436: base: external drive connected to usb 3.0 slows down boot process extremely

[Micha]

Package: base
Severity: normal

Dear Maintainer,

I have connected an external usb drive to USB 3.0 Port which is located
on a newly installed PCI card.

This slows down the boot process in an extremely manner.

It seems that the accesses to the internal hard disk are suffering badly
from this.

When I disconnect the external drive the boot process suddenly gets the
normal much faster speed.

I can workaround the problem by connecting the usb drive to an USB 
port lower than 3.0 (seems to be USB 2.1).

I have found out that the problems occurs in the booting process
even before the external intenso usb drive is mounted.

I could not find any USB 3.0 Howto for debian jessie.

My uname -a is:

Linux debian 3.16.0-4-686-pae #1 SMP Debian 3.16.7-ckt11-1 (2015-05-24) i686 GNU/Linux

Kind regards,
Michael

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-- System Information:
Debian Release: 8.1
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: i386 (i686)

Kernel: Linux 3.16.0-4-686-pae (SMP w/4 CPU cores)
Locale: LANG=de_DE.utf8, LC_CTYPE=de_DE.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)