Abhishek Kumar Rai 5:12 PM (16 minutes ago) to rauc-request Hi team , I am new to rauc .Please solve my query I have written system.conf file {{{ abhishek@abhishek-Latitude-5490:~$ cat system.conf [system] compatible=eximius bootloader=uboot mountprefix=/mnt/rauc statusfile=/factory/rauc.status [keyring] path=cert.pem [slot.rescue.0] #device=/dev/mmcblk1p0 device=/dev/disk/by-path/platform-219c000.usdhc-part0 type=raw bootname=rescue [slot.factory.0] #device=/dev/mmcblk1p1 device=/dev/disk/by-path/platform-219c000.usdhc-part1 type=ext4 bootname=factory [slot.servicewatch_datalogger.0] #device=/dev/mmcblk1p2 device=/dev/disk/by-path/platform-219c000.usdhc-part2 type=ext4 bootname=servicewatch_datalogger [slot.datalogger_space.0] #device=/dev/mmcblk1p3 device=/dev/disk/by-path/platform-219c000.usdhc-part3 type=ext4 bootname=datalogger_space [slot.rootfs.0] #device=/dev/mmcblk1p4 device=/dev/disk/by-path/platform-219c000.usdhc-part4 type=ext4 bootname=A [slot.rootfs.1] #device=/dev/mmcblk1p5 device=/dev/disk/by-path/platform-219c000.usdhc-part5 type=ext4 bootname=B [slot.appfs.0] #device=/dev/mmcblk1p6 device=/dev/disk/by-path/platform-219c000.usdhc-part6 type=ext4 parent=rootfs.0 [slot.appfs.1] #device=/dev/mmcblk1p7 device=/dev/disk/by-path/platform-219c000.usdhc-part7 type=ext4 parent=rootfs.1 [slot.appdata.0] #device=/dev/mmcblk1p8 device=/dev/disk/by-path/platform-219c000.usdhc-part8 type=ext4 parent=rootfs.0 [slot.appdata.1] #device=/dev/mmcblk1p9 device=/dev/disk/by-path/platform-219c000.usdhc-part9 type=ext4 parent=rootfs.1 }}} how to use hook in order to preserve the data of appdata0, while installing bundle . In which file i have to give hook option? Regards, Abhishek -- The information contained in this e-mail message (including any  attachments) may be confidential, proprietary, privileged, or otherwise exempt from disclosure under applicable laws. It is intended to be  conveyed only to the designated recipient(s). Any use, dissemination,  distribution, printing, retaining or copying of this e-mail (including its  attachments) by unintended recipient(s) is strictly prohibited and may  be unlawful. If you are not an intended recipient of this e-mail, or believe  that you have received this e-mail in error, please notify the sender  immediately (by replying to this e-mail), delete any and all copies of  this e-mail (including any attachments) from your system, and do not disclose the content of this e-mail to any other person. Thank you for your cooperation. -- _This e-mail message (including any attachments) may be confidential, proprietary, privileged, or otherwise exempt from disclosure under applicable laws. If you are not an intended recipient, please delete this message. Thank you. _