Bug#791436: SOLVED Bug#791436: base: external drive connected to usb 3.0 slows down boot process extremely

[Michael Roediger]

 

Dear Maintainer,

 

although it is not a linux problem I want to tell you how I have solved this hardware issue.

 

First of all some information about my mainboard:

 

It is an older one: G31M-ES2L version F4  (rev 1.x) from Gigabyte

 

From http://www.gigabyte.de/products/product-page.aspx?pid=2889#bios

 

you can see that this version is from the 20th August in 2008.

 

The solution was to change a certain setting in the BIOS for the internal hard disk.

 

This has been:

 

In the main menu of the BIOS setup choose "Integrated Peripherals"

 

Then set "On-Chip SATA Mode" from "Auto" to "Enhanced"

 

Save and Exit the BIOS setup and reboot.

 

The writing performance to my internal hard disk (with the external 1 TB USB being attached to the USB 3.0 port )

is now:

 

root@debian:~# time dd if=/dev/zero of=/srv/mytest.dat bs=100M count=20
20+0 Datensätze ein
20+0 Datensätze aus
2097152000 Bytes (2,1 GB) kopiert, 29,193 s, 71,8 MB/s

real    0m29.279s
user    0m0.000s
sys    0m4.688s

 

The writing performance to my external USB drive connected to USB 3.0 is now:

 

root@debian:~# time dd if=/dev/zero of=/media/gmr/INTENSO/mytest.dat bs=100M count=20
20+0 Datensätze ein
20+0 Datensätze aus
2097152000 Bytes (2,1 GB) kopiert, 23,0218 s, 91,1 MB/s

real    0m23.029s
user    0m0.000s
sys    0m5.344s

 

So that is obviously fast enough for this old hardware.

 

PS:

The cheap USB 3.0 card (two USB 3.0 ports) works and does not need to be replaced by a more expensive one.

Additionally, no BIOS update is necessary, which would be a very critical task to be done.

 

Kind regards,

Michael

 

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