# WP7607 unwanted rollbacks **URL:** https://forum.legato.io/t/wp7607-unwanted-rollbacks/6926 **Category:** Uncategorized **Created:** [May 28, 2025, 10:26am UTC](https://forum.legato.io/t/wp7607-unwanted-rollbacks/6926 "2025-05-28T10:26:35Z") **Posts on this page:** 1 **Showing post:** 2
### Author: ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi) #### Post date: [May 28, 2025, 10:37am UTC](https://forum.legato.io/t/wp7607-unwanted-rollbacks/6926/2 "2025-05-28T10:37:01Z")
Probably this is due to improper power down sequence, you can see here: > **[\[WP7607\] Data deletion after power loss](https://forum.sierrawireless.com/t/wp7607-data-deletion-after-power-loss/26944/9)** > > I’ve looked into the PCVOLTLIMITS, it could be useful if it put the board in a safe state before complete power loss, but as far as I have read it only puts the WP in ULPM, and I can’t get it to work with my current power supply. As for the SD, it... > **[Free (small) partition for storing serial number?](https://forum.sierrawireless.com/t/free-small-partition-for-storing-serial-number/24001/15)** > > In case others google their way to here: I finally managed to crack this challenge … The solution was to create extra ufs partitions in the “system” (mtd13) mtd partition with my data. This way, all can be restored, even if (when) /mnt/flash... Some solution can be putting important file to reserved partition: > **[\[WP7702\] Recovery Mechanisms](https://mangoh.discourse.group/t/wp7702-recovery-mechanisms/10159/4)** > > does this help by using the “reserved” partition? root@swi-mdm9x28-wp:~# more /proc/mtd dev: size erasesize name mtd0: 00280000 00040000 "sbl" mtd1: 00280000 00040000 "mibib" mtd2: 00680000 00040000 "backup" mtd3: 00100000 00040000... Or you can build those your application together with legato.cwe > [@Flash size wp7607](https://forum.legato.io/t/flash-size-wp7607/3805/35): > > you can go to legato-19.02.0/modules/WiFi/wifi.sdef, under “apps:” section, add e.g. $LEGATO\_ROOT/apps/sample/helloWorld/helloWorld.adef [image] Now the new app will be included in legato.cwe. Please also note that the max size for legato partition is 8MB. Or you can put important files together with yocto.cwe: > [@Flash size wp7607](https://forum.legato.io/t/flash-size-wp7607/3805/24): > > please see attached doc: [[WP76xx] Example on putting own files and building helloworld application into yocto image.docx](https://forum.legato.io/uploads/short-url/p8McoolV3Ki6T295byz0AJRkXZM.docx) (20.9 KB) --- _[View the full topic](https://forum.legato.io/t/wp7607-unwanted-rollbacks/6926)._