[PVE-User] Thin LVM showing more used space than expected

[Óscar de Arriba]

Hi Alain,

Thanks for taking time to answer my message.
I think Proxmox UI is showing the % of wearout consumed. I just checked SMART using smartctl and it is showing 2.86 TB witten of a maximum of 180 TBW of this model (6%).

I think those numbers are too much for the usage of this drive, but the number of power on hours match (52 days). I think the TBW are elevated because we had an instance with swap actived and that could generate s lot of IO (that's no longer the case from a couple of weeks ago).

However, the strange behaviour of showing much more space used than the sum of VM disks + snapshots continue, and I'm really worried that the performance issue after copying some data can come from that situation. Also, the unit is showing now a 96% of space used, which worries me about decreased performance because of fragmentation issues.

Oscar

On Wed, Dec 28, 2022, at 11:52, Alain Péan wrote:
> Le 27/12/2022 à 18:54, Óscar de Arriba a écrit :
> > For storage, I'm using a commercial Crucial MX500 SATA SSD connected directly to the motherboard controller (no PCIe HBA for the system+data disk) and it is brand new - and S.M.A.R.T. checks are passing, only 4% of wearout.
> 
> Hi Oscar,
> 
> Just to be sure, because normally wearout is 100% when the SSD is new, 
> You are just soustracting, and it is in fact 100-4 = 96% ?
> My SSDs (Dell mixed use) after some years are still at 99%, so I am 
> wondering about 4%...
> 
> Alain
> 
> -- 
> Administrateur Système/Réseau
> C2N Centre de Nanosciences et Nanotechnologies (UMR 9001)
> Boulevard Thomas Gobert (ex Avenue de La Vauve), 91120 Palaiseau
> Tel : 01-70-27-06-88 Bureau A255
> 
>