Permissions of harddrive change by itself!!

[fredco48]

I have two self built NASses with 24 WD EARS HDD's in each configured as JBOD. I have repeatedly set the sharing permissions to "read only" for each drive separately. When checking this say a few weeks later, all are still read only.
But then I forget about it and when I check this say half a year later, to my big surprise, ALL drives have mysteriously reverted to "full control".
I have data on these drives that I don't want changed, just read. It's also a protection against ransomware. It seems these drives have a will of their own... I can't seem to find anything like this on the internet, so maybe someone here?

 

[ElectrO_90]

Drives can't change themselves, it is something to do with your software. I use Synology and never a problem

 

[failboat]

How are you trying to change them?

If you're root on a pc connected to the NAS it doesn't mean you are root on the NAS.

 

[fredco48]

@ElectrO_90: I know it seems weird and I know drives don't change themselves. But the machines I'm referring to are selfmade: servergrade Norco encasings for 24 drives, a Supermicro board and interfaces and Windows 7 as OS. Basically they're just very large desktops and running already for years now. They are quite clean without any external software that might do something I am not aware about.

@failboat: I am changing them through remote desktop. I am almost 100% sure I am also root on the NAS as there only is one user, me: the administrator. And like I said: the change is there for a short period of time. When I check after a few weeks the drives are still read only, but when I wait longer they revert back. Come to think of it: maybe it's after a reset. I'll test that and report back.

 

[fredco48]

@failboat: Just tested the reset and it's even stranger. Out of 24 drives now 8 are back at full control. It's 7 drives on one interface card and one on another. I have three Supermicro AOC-SAS2LP-MV8 interface cards for 8 drives each.