SDS@hd/Security

Snapshots

Snapshots are used to create a point-in-time copy of a file system or file sets.

Motivation: Snapshots can be used to quickly restore files or folders that were unintentionally deleted. Snapshots also provide a form of file versioning and the ability to revert to a previous version of a file, depending on the time interval between snapshots. The shorter ago a change was made and/or the longer it was kept the likelier it is that it can still be found in one of the snapshots.

When looking into the .snapshots folder within your SV you can see how often the snapshots are taken and how long they are preserved. For example:

ls .snapshots
> @GMT-2026.08.10-19.07.13  @GMT-2026.09.09-14.15.00  @GMT-2026.09.14-20.15.00  @GMT-2026.09.16-16.15.00  @GMT-2026.09.19-08.15.00
@GMT-2026.08.11-01.07.13  @GMT-2026.09.09-22.15.00  @GMT-2026.09.14-20.45.00  @GMT-2026.09.16-16.45.00  @GMT-2026.09.19-09.00.00
@GMT-2026.08.11-07.07.13  @GMT-2026.09.10-06.15.00  @GMT-2026.09.14-21.15.00  @GMT-2026.09.16-17.15.00  @GMT-2026.09.19-03.15.00 
@GMT-2026.09.19-03.45.00  @GMT-2026.09.19-05.45.00  @GMT-2026.09.19-07.45.00

Hints

• It's not allowed to use SDS@hd as a backup for your data. The data on SDS@hd must be actively used. If the data is not actively used, you might find out about an accidental deletion of data far too late so that there isn't a snapshot anymore that contains the deleted data.
• Please avoid keeping duplicate data in your SV. Even if the duplicate data is stored in the SV for a short time period only, it can still make it into a snapshot and use up storage space on SDS@hd for quite a long time.
• When uploading data, please make sure that all the data actually made it into the SV. The snapshots can't capture data that has never reached the SV. Please see Data Transfer for help with ensuring that data transfers were finished successfully.