my record on upgrading from 4.1 to 5.0 reference: Step 1: download gnoboot-alpha10.5 get it on http://www.gnoboot.me/ > Downloads > gnoboot-alpha-lastest-mirrorX extract password: 6n0boot-AlpHaTen.5 Step 2: download DSM 5.0-4458 from Synology website http://global.download.synology.com/download/DSM/5.0/4458/DSM_DS3612xs_4458.pat for release notes or China mirror site, go to http://www.synology.com/en-us/support/download/DS3612xs#download_tabs_dsm Step 3: download & install Win32DiskImager http://sourceforge.net/projects/win32diskimager/ -> download and install select the *.img file and destination usb device, then press write. *-ext2.img if you read/write in linux, otherwise *-vfat.img across multi-platform. -vfat.img modified time looks incorrect, but after image was written, its zImage modified date is 2014-04-04 Step 4: boot-up (if applicable) connect VGA cable and keyboard to N36L insert USB drive, boot up N36L (config BIOS if USB not 1st boot device) select “gnoboot.me” in GRUB menu > “gnoboot-5.0-4458” wait a while until “DiskStation login:” displayed use Synology Assistant to lookup new IP address, double click to open web interface Step 5: installation follow on screen instructions, uploaded the downloaded DSM_DS3612xs_4458.pat at the end, a warning will be display, about permission or serial number error. ignore it. deal with it after boot up. Step 6: reboot this time, select “gnoboot-alpha” on grub It takes quite a long time for upgrade script to run, be patient and don’t panic. At this moment, set static IP on router for new MAC address (screen from Synology Assistant) When “DiskStation login:” displayed, new 5.0 can be used Step 7: update and grant permission Control panel >User, grant admin with all read/write access. re-create user if any. Go to File Station > usbshare1 > boot > grub > meun_alaph.lst , right click, open with Text Editor change from “kernel /zImage” to  “kernel /zImage sn=B3JN12345” Control panel > Update and restore > Download, click “Download” button update 2 is important for OpenSSL bug (Heartbleed). Yet, meaningless if it is a home network though ssh to Diskstation, as root, run

then go back to web interface and click Update once download finished. System will restart  

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