Install IPKG on a Synology DS415play

I search for a easy guid to install ipkg on my Synology DS415play with Intel Atom CPU. I found a guid by Edward P:

Connect to your NAS as root through SSH
Go to a temporary folder, for example:

cd /volume1/@tmp

Download the bootstrap script:

wget http://ipkg.nslu2-linux.org/feeds/optware/syno-i686/cross/unstable/syno-i686-bootstrap_1.2-7_i686.xsh

Make the downloaded script file executable:

chmod +x syno-i686-bootstrap_1.2–7_i686.xsh

Execute the bootstrap script:

sh syno-i686-bootstrap_1.2–7_i686.xsh

Installation should now be completed. To test it, run:

ipkg update

Enjoy.

Erase and overwrite Disk on Synology DiskStation

I wanted to erase and overwrite the data on some hard disks that I need to downgrade my RAID 5 from three 4TB WD Red to only two. The erase function on the webgui doesn’t work – something message like “don’t possible with your drive”. I search and found an alternative:

dd if=/dev/zero of=/dev/sdX bs=1M conv=noerror

To identify the disk use fdisk and/or hdparm:

fdisk -l
hdparm -I /dev/sdX

To run the dd command furthermore after disconnection from the SSH connection, use nohup:

nohup dd if=/dev/zero of=/dev/sdX bs=1M conv=noerror