# Incorrect cloud suggstions for instance (ephemeral) SSDs

**URL:** https://forums.foundationdb.org/t/incorrect-cloud-suggstions-for-instance-ephemeral-ssds/4367
**Category:** Development
**Created:** [February 25, 2024, 2:22pm UTC](https://forums.foundationdb.org/t/incorrect-cloud-suggstions-for-instance-ephemeral-ssds/4367 "2024-02-25T14:22:58Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![danthegoodman](https://sea1.discourse-cdn.com/foundationdb/user_avatar/forums.foundationdb.org/danthegoodman/32/1567_2.png) [@danthegoodman](https://forums.foundationdb.org/u/danthegoodman)
#### Post date: [February 25, 2024, 2:22pm UTC](https://forums.foundationdb.org/t/incorrect-cloud-suggstions-for-instance-ephemeral-ssds/4367/1 "2024-02-25T14:22:58Z")

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At the wiki page [Running FoundationDB in the Cloud · apple/foundationdb Wiki · GitHub](https://github.com/apple/foundationdb/wiki/Running-FoundationDB-in-the-Cloud) the [Ephemeral SSDs section](https://github.com/apple/foundationdb/wiki/Running-FoundationDB-in-the-Cloud#ephemeral-ssds) says:

> In theory however, you would lose all your data if a whole region would go down due to a power failure.

For the instances with attached nvme drives, power failure does not lose data. Data is only lost when you stop or terminate a node, but any crashes, reboots, or other non-machine-releasing events maintain the same disk because the machine is not potentially remapped to another host.

> The data on an instance store volume persists even if the instance is rebooted. However, the data does not persist if the instance is stopped, hibernated, or terminated.

See [https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/InstanceStorage.html](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/InstanceStorage.html)