# Missing data when hub is without power **URL:** \ **Category:** Tempest Owners\ **Created:** [June 23, 2018, 6:28am UTC](https://community.tempest.earth/t/missing-data-when-hub-is-without-power/1352 "2018-06-23T06:28:43Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![philopadridus](https://avatars.discourse-cdn.com/v4/letter/p/df788c/32.png) [@philopadridus](https://community.tempest.earth/u/philopadridus)\ **Post date:** [June 23, 2018, 6:28am UTC](https://community.tempest.earth/t/missing-data-when-hub-is-without-power/1352/1 "2018-06-23T06:28:43Z")
Hello, As i understand via indiegogo updates news. That when HUB is offline (power off) , weather data is stored on AIR and SKY and when HUB is back online (power on), AIR and SKY would send missing data to him. ![Screenshot_20180623-082408_Smart%20Weather](https://cdck-file-uploads-us1.s3.dualstack.us-west-2.amazonaws.com/flex020/uploads/sws/original/2X/a/a21d9447e48e06aa10de5d83bfb185aaccbbe2d9.jpg) Do i have to change some setting or did i miss read information? ---
**Author:** ![weather-display](https://sea2.discourse-cdn.com/flex020/user_avatar/community.tempest.earth/weather-display/32/989_2.png) [@weather-display](https://community.tempest.earth/u/weather-display)\ **Post date:** [June 23, 2018, 6:38am UTC](https://community.tempest.earth/t/missing-data-when-hub-is-without-power/1352/2 "2018-06-23T06:38:47Z")
for me, I get the last hour re populated OK but have not seen it work for longer than that? maybe others can share their experience ---
**Author:** ![todayweather4](https://sea2.discourse-cdn.com/flex020/user_avatar/community.tempest.earth/todayweather4/32/708_2.png) [@todayweather4](https://community.tempest.earth/u/todayweather4)\ **Post date:** [June 23, 2018, 2:05pm UTC](https://community.tempest.earth/t/missing-data-when-hub-is-without-power/1352/3 "2018-06-23T14:05:07Z")
same here, in my case I just noticed that it approx restore one hour and half of data in my graph. ---
**Author:** ![philopadridus](https://avatars.discourse-cdn.com/v4/letter/p/df788c/32.png) [@philopadridus](https://community.tempest.earth/u/philopadridus)\ **Post date:** [June 27, 2018, 3:23pm UTC](https://community.tempest.earth/t/missing-data-when-hub-is-without-power/1352/4 "2018-06-27T15:23:58Z")
Ok…i think that is really not enough…1 hour of data…i was expecting much more… ---
**Author:** ![hankster](https://sea2.discourse-cdn.com/flex020/user_avatar/community.tempest.earth/hankster/32/64_2.png) [@hankster](https://community.tempest.earth/u/hankster)\ **Post date:** [June 27, 2018, 9:10pm UTC](https://community.tempest.earth/t/missing-data-when-hub-is-without-power/1352/5 "2018-06-27T21:10:22Z")
Put a UPS on the hub and it will store many hours of data. When power returns and you have internet access back, it will upload the data. ---
**Author:** ![gerples](https://avatars.discourse-cdn.com/v4/letter/g/a9a28c/32.png) [@gerples](https://community.tempest.earth/u/gerples)\ **Post date:** [October 15, 2018, 7:38pm UTC](https://community.tempest.earth/t/missing-data-when-hub-is-without-power/1352/6 "2018-10-15T19:38:05Z")
Does this still hold true, RE: Data is lost when Hub is powered off? I missed several days of data during a power outage.If the Hub was ON for those several days but Internet was off would it upload all backlogged data for the last several days … when the Internet is restored? ---
**Author:** ![hankster](https://sea2.discourse-cdn.com/flex020/user_avatar/community.tempest.earth/hankster/32/64_2.png) [@hankster](https://community.tempest.earth/u/hankster)\ **Post date:** [October 16, 2018, 9:46pm UTC](https://community.tempest.earth/t/missing-data-when-hub-is-without-power/1352/7 "2018-10-16T21:46:48Z")
The sensors will only hold a few hours of data so if the hub is not powered you will lose data after that amount of time. Not sure of the exact amount of data a powered hub will hold but believe it is a few days worth. In theory it should backfill the data it holds once internet is restored but last I read a few have had issues with the backfill process.