Just received this email a few hours ago from the VPS hosts at Arvixe:
Routine monitoring of the server that hosts your account has identified hardware errors that could lead to corruption and loss of data if left unresolved. In order to preserve the safety and integrity of your VPS data, we are scheduling an emergency maintenance window for tonight, 22 May 2015, at 21:00PDT.
This maintenance is scheduled to last up to 2 hours, and during this time all hosting services will be unavailable.
We apologize for the inconveniece and short notice, but the integrity and safety of your data is one of our highest priorities and this maintenance is necessary in order to safeguard it against corruption.
Details and updates will be available via http://www.arvixe.com/alerts once the maintenance starts, and our Server Management Team will be actively participating so as to instantly address any issues that might pop up.
Again, please accept our apologies for the inconvenience, and know that we will do everything possible to minimize the disruption.