Why is it that I'm allowed to even Select a btrfs Option on an ext4 drive?

Currently reading
Why is it that I'm allowed to even Select a btrfs Option on an ext4 drive?

DS 718+, 2x-DS 720+
  1. RT2600ac
Operating system
  1. Windows
Mobile operating system
  1. iOS
Last edited:
Whereas on my new 720+ because it started out life in V7, I was able to format Volume 1 as btrfs format.... I was not confused when I set up the SSD cache when it asked to set aside space for btrfs format.....

HOWEVER..... When I finially received "Compatible" NVME SSD's for my older 720+ (formated as EXT4 within DSM 6)..... But presently at V7.1 Update 1.....
And I added the 2x NVME SSD's as a R/W Cache to the (I SWEAR FORMATTED AS: ext4 drives which upgraded from V6 to V7.1 Update 1.....

WHY IS IT, that I was even Given the option of setting aside cache Space for btrfs drives?? I SWEAR It's formatted as EXT4!


I did not select that option.... I shouldn't have even been given that option..... Right???
-- post merged: --

Apparently sometime in 7 conversion, the ext4 format that was created in V6, was changed to btrfs.... ???

Yeah... That is what it is reporting to be now!!! On both systems updated from V6!

So I should have answered YES to setting aside more space for btrfs format !! ??
-- post merged: --

So went into old 720+, removed Cache (Getting GOOD at this :)! ) and then re-installed R/W Cache..... This time Selecting the btrfs option in SSD Cache.....

Wasn't there a big Hullabaloo over btrfs in V6? "Everybody should be EXT4?" I swear both my 718+ & 720+ in V6 started out life as EXT4 format.... Now both say btrfs format.... as well as unit that began life as V7.

PS: all are 2 drive SHR
A day I had a crash on the NAS with DSM 6, RAID 5 and btrfs. So I had to reset with mode 2. The result was that it installed DSM 7, and converted RAID 5 to SHR 1, without asking. But it was fine on my case.

Create an account or login to comment

You must be a member in order to leave a comment

Create account

Create an account on our community. It's easy!

Log in

Already have an account? Log in here.

Similar threads

I had pretty much concluded that this probably isn't worth messing with this any further and pretty much...

Welcome to SynoForum.com!

SynoForum.com is an unofficial Synology forum for NAS owners and enthusiasts.

Registration is free, easy and fast!