what is difference between /hana/data and /usr/sap/sid/hdb00/backup/data ?

Hi Hana Experts,

Can someone please confirm difference between this 2 data path? /hana/data and /usr/sap/sid/hdb00/backup/data. Same for log file /hana/log and /usr/sap/sid/hdb00/backup/log

BR,Nilesh