I take no liability for data loss! At your own risk, do backups before and before upgrading DSM!
Per previous posts, the lack of sequential skipping has been driving me MAD. Thankfully I found a way to expose the feature on the GUI for use.
Reddit member qriff said this post was stupid due to not explaining why Skip Sequential is disabled, I thought it would be apparent since the strings that enabled the feature were absent from the conf file but not everyone hacks on DSM. The reason why this feature is missing from the DS716+ is that Synology by intention or accident neglected to enable Skip Sequential IO for this model by leaving the two strings that enable it from the conf. I have called Synology and the only advice they can provide is to file a feature request at http://www.synology.com/en-us/form/inquiry/feedback
Edit: Qriff has given me Reddit Gold and had this to say:
“Great, thanks. Just wanted to make sure that there actually where some absolute indication the option actually does something, as usually features left out don’t function on specific equipment and many are too eager to claim “hacks” working just because they have enabled a html tickbox. Be rude, you’ve earned it, as long as one also responds to the questioning. <3 Many of us have the exactly same conflicting feelings about NAS / Synology / etc.”
I never thought anyone would be reading this blog, it was more of a convoluted Evernote to store my internal ramblings. As I continue to write articles and gain a following, I will strive to write articles with an audience in mind!
SSH into your DS716+ and add these two strings:
To both the
files (right under # system options works fine). Reboot and enable the option!
I’m not going to spend another few hours recording a screencast proving that Skip Sequential IO is now working, but believe me when I say that Sequential IO is skipped on the SSD Cache and passes through to the HDDs. Yes, random IO is still cached and served from the SSD Cache. Here is one screenshot that I hope is satisfactory: