+Most VMs contain a temporary disk, which is not a managed disk. The temporary disk provides short-term storage for applications and processes, and is intended to only store data such as page files, swap files, or SQL Server tempdb. Data on the temporary disk may be lost during a [maintenance event](./understand-vm-reboots.md) or when you [redeploy a VM](/troubleshoot/azure/virtual-machines/redeploy-to-new-node-windows?toc=%2fazure%2fvirtual-machines%2fwindows%2ftoc.json). During a successful standard reboot of the VM, data on the temporary disk will persist. For more information about VMs without temporary disks, see [Azure VM sizes with no local temporary disk](azure-vms-no-temp-disk.yml).
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