So it is highly possible the disk /dev/disks/t10.ATA_____WDC_WD6000HLHX2D01JJPV0_______________________WD2DWXG1EB0DXH92 has been used as a scratch partition by the ESXi host it is attached to.
By design ESXi creates a vmkcore & scratch partition on a "blank" disk with no PT info.
You can run the below commands to verify if that is the case:
vmkfstools -Ph /vmfs/volumes/51c06671-19f64284-02eb-001b21a22f7d/
esxcfg-dumppart -l
If the above points to the problem disk then it has been formatted. You might want to engage a 3rd party data recovery team - VMware KB: Data recovery services for data not recoverable by VMware Technical Support