Are these on single disk?
Filesystem Size Used Avail Use% Mounted on
/dev/sda 28G 23G 5.4G 81% /
devtmpfs 3.9G 4.0K 3.9G 1% /dev
none 796M 316K 796M 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 3.9G 0 3.9G 0% /run/shm
If my filesystem spans multiple disks then which one the disks could be as in the photo?
What do you mean by multiple disks? Do you mean as you see it in linode manager? Or do you mean how linode manages it on linode's servers? I'm not sure if there is information available for what linode does on it's end since it may be a security issue for them to tell it.
By "disk" do you mean what linode calls a "volume"? In other words when you click the Create button in the linode manager it has "Volume" as an option in the list - is that what you mean? I'm not positive (since I never created one of these "volumes" myself) but I would think that what you see is what you get. In other words, one volume should equal one disk.
I want to help but I'm not real familiar with the question so please try to verify anything I said here and maybe someone else will come along and be able to answer better than I can.