Please consult your system administrator before resizing your shadowstorage. However, this may not be true for other applications, especially other backup applications. Your backups on disk and/or cloud are safe. ZWC itself does not need old snapshots for any reason. This is most common when the shadowstorage space is changed from UNBOUNDED to some smaller value, but may occur any time the shadowstorage space is reduced. If you lower the amount of space available, Windows will automatically remove any excess snapshots, starting with the oldest. ![]() Please be cautious if you change the Maximum Shadow Copy Storage space. How to Resize Existing Shadowstorage Space The vssadmin add shadowstorage command is described in full on Microsoft’s website at. Examples include 20%, 10GB, 5000MB, and so on. You may also substitute other values for the /maxsize value. This allows you to allot space for snapshots for any drive, even if a drive does not have enough free space to hold them. This includes allotting space for one drive on another.įor example, if you entered vssadmin add shadowstorage /for=C: /on=D: /maxsize=10%, then any snapshots for the C: drive would be created on the D: drive. You may substitute any drive letter for X: in the above command. Open an elevated command prompt using the run as administrator option.Įnter the command: vssadmin add shadowstorage /for=X: /on=X: /maxsize=10%. To add shadowstorage space if none exists, please follow these steps: How to Add Shadowstorage Space if None Exists ![]() īelow are examples of how to add or resize shadowstorage manually. You may manage shadowstorage manually via the Windows command prompt using the vssadmin commands, as shown in the following Microsoft Knowledge Base article. Backups will usually fail if there is not enough shadowstorage space for snapshots. Zmanda Windows Client, like all VSS-based backup applications, requires space for VSS snapshots on any disk which contains data that is part of a backup.
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