Thanks Jean-Philippe and Stéphane,
@JP A priori, not, see dh.png.
But on PVE, HDs seem odd, see hd.png : PVE is installed on a hard RAID1 on a Dell server which have 4 HDs of 1 To.
I break the RAID, change one disk (# 0), remake a RAID1 and reinstall PVE.
@Stephdl I don't know how to use smartctl on hard RAID on Dell server and first I try this evening to make a snapshot and to morrow I shall read Dell's doc to know how verify RAID's disks.
And I come back.
Bye