OpenBSD 6.7 on PC Engines APU4D4

I just got myself a PC Engines APU4D4. I miss an OpenBSD box providing home services. It’s quite simple to install and run OpenBSD on this machine. And you can even update the BIOS from OpenBSD.

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Roll back from DSM 5 to 4

So it seems DS409slim, faked as DS411j, is a bit too slim for DSM v5. So let’s rollback to the official (nearly) supported version.

First thing to do is to decide which DSM v4 to go for. Looking at the Release Notes, 4.2-3211 is the last common firmware version (between 409slim and 411j). Previous version is 4.2-3202

Log in the DS409slim using SSH.

dharma> cp -p /etc.defaults/VERSION /etc.defaults/VERSION.orig
dharma> cp -p /etc/VERSION /etc/VERSION.orig
dharma> cat /etc.defaults/VERSION
dharma> cp -p /etc.defaults/VERSION /etc/VERSION

Download 4.2-3211 firmware for DS411j (
Now, log-in to the DSM Web interface. From the “Control Panel”, go to “Update and Restore”. Click the “Manual DSM Update”. Select the downloaded firmware and click “OK”. Validate the warning message and wait until downgrade is processed. Let the system reboot and get to the DSM 4.2 log-in screen.

In my case, the password was wrecked. So I had to reset the whole syno to be able to log back-in. Once done, you’ll see that the syno is back to DSM 4. From here, you can simply configure your syno back to DS409slim.

# vi /etc.defaults/synoinfo.conf /etc/synoinfo.conf

In my case, I wanted to get as high as possible in the DSM 4 release. So I manually upgraded to DSM 4.3-3827 Update 7. They I modified synoinfo.conf.

No data were lost. And 409slim runs fast again. Great!

Restore Asus Transformer TF101 original firmware

I have installed a custom firmware on my Asus Transformer TF101 to be able to use my 3G HSDPA USB adapter. It is running Android 3.2.1. Now that the Ice Cream Sandwich firmware (4.0) is released fot the TF101, it’s time to go back to the original, AKA stock, firmware and run the upgrade the “supported” way.

According to the forums, there are two ways of doing it. Either restore the bootloader and the firmware using the ClockworkMod or use a Windows/Linux workstation to erase and replace the whole system with the official system. I choose the second option as I didn’t understand how to run the first… and the second option is quite similar to the one I used when I rooted to tab.
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Upgrade Crucial C300 firmware on a MacBook Pro

I just got a Crucial C300 SSD to plug in my Mac. And it came in revision 02 ; but the latest bug free firmware is revision 07.

To upgrade, just go to the Crucial website and get the “” archive. Unzip and burn the ISO file. Reboot, use ‘alt’ to drop to the boot selector and select the CD drive ; it appears as “Windows”. Let the process find your drive and upgrade the firmware to 06. When done, reboot.

Now, get the “” archive and replay the previous scenario.
After a few seconds, the SSD has the latest firware installed:

C300-CTFDDAC256MAG : Capacité: 256,06 Go (256 060 514 304 octets) Modèle: C300-CTFDDAC256MAG Révision: 7

So easy! And so nice it works on the Mac!