https://community.netapp.com/t5/ONTAP-Discussions/About-disk-ZCS-BCS-question/m-p/127055#M27509 <P>I have serveral questions about disk want to ask.</P><P>&nbsp;</P><P>1、</P><P>What is the advantage of using a 520-byte sector on a disk than a 512-byte sector?<BR />Can I use 512-bytes sector disk and 520-bytes sector disk in the same raid group?</P><P>&nbsp;</P><P>2、<BR />ZCS is use the ninth block to checksum.<BR />BCS is use the Sixtieth-four block to checksum.<BR />After the raid group is created.<BR />Can I understand the raid group have double checksum ?<BR />BCS/ZCS and checksum disk.</P><P>&nbsp;</P><P>3、<BR />How BCS/ZCS work?</P> Wed, 04 Jun 2025 16:09:59 GMT Demon-Huang 2025-06-04T16:09:59Z https://community.netapp.com/t5/ONTAP-Discussions/About-disk-ZCS-BCS-question/m-p/127055#M27509 <P>I have serveral questions about disk want to ask.</P><P>&nbsp;</P><P>1、</P><P>What is the advantage of using a 520-byte sector on a disk than a 512-byte sector?<BR />Can I use 512-bytes sector disk and 520-bytes sector disk in the same raid group?</P><P>&nbsp;</P><P>2、<BR />ZCS is use the ninth block to checksum.<BR />BCS is use the Sixtieth-four block to checksum.<BR />After the raid group is created.<BR />Can I understand the raid group have double checksum ?<BR />BCS/ZCS and checksum disk.</P><P>&nbsp;</P><P>3、<BR />How BCS/ZCS work?</P> Wed, 04 Jun 2025 16:09:59 GMT https://community.netapp.com/t5/ONTAP-Discussions/About-disk-ZCS-BCS-question/m-p/127055#M27509 Demon-Huang 2025-06-04T16:09:59Z