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Manage Level-2 Storage

PrimoCache implements a feature named level-2 cache. With this feature, PrimoCache is able to use solid-state drives or flash drives as cache for mechanical hard disks. Before using level-2 cache, a level-2 storage volume needs to be created first. It is a dedicated partition that is not recognized by operating systems, storing cache index and content. Each level-2 storage volume is able to provide cache storage for up to 16 cache tasks. Cache contents stored in level-2 storage are persistent and not deleted across computer restarts.

Create Level-2 Storage

To create a level-2 storage volume, click on the icon button in the command toolbar. If you already have a level-2 storage volume, PrimoCache will pop up a dialog as below. Click the Create Level-2 Storage button in this dialog to pop up the format dialog.

PrimoCache Level-2 Storage Manage Dialog

If you haven't created a level-2 storage volume before, PrimoCache will directly pop up the format dialog as below.

PrimoCache Level-2 Storage Format Dialog

Select the partition that you want to be formatted to a level-2 storage volume. Usually it is a partition of solid-state drive or flash drive which is much faster than normal mechanical hard disks. If you haven't partitioned the SSD or flash drive yet, you need to create a partition first, by using Windows Disk Management or other partitioning tools.

Type the label to identify this new level-2 storage volume.

Now click the Format button to convert the selected partition to a level-2 storage volume. WARNING: The format process will cause all data in the selected partition to be lost and unrecoverable!

Manage Level-2 Storage

You can view and manage existing level-2 storage by clicking on the icon button in the command toolbar. In the popped-up dialog, select the level-2 storage volume to view the status of its partitions and free space. A partition of the level-2 storage volume refers to a continuous space area for one cache task. The column Cache indicates the index number of the cache task to which the partition belongs. PrimoCache automatically manages the partitions of level-2 storage volumes. If level-2 cache is specified when creating a cache task, PrimoCache allocates and creates a partition for the new cache task. When this cache task is stopped, PrimoCache deletes the partition accordingly.

PrimoCache Level-2 Storage Manage Dialog

Convert Level-2 Storage to Normal Volume

You can change a level-2 storage volume back to a normal volume by the following steps.

1. Click Windows Start button, and then click Control Panel to open the Control Panel.

2. Open the Administrative Tools window.
    In Windows 7, choose System and Security and then choose Administrative Tools.
    In Windows Vista, choose System and Maintenance and then choose Administrative Tools.
    In Windows XP, open the Administrative Tools icon.

3. In the Administrative Tools window, open the Computer Management icon.

4. On the left side of the window, choose Disk Management.

5. Select and right-click on the volume icon which represents the level-2 storage volume to be converted. Then choose Delete Volume... from the popped-up context menu.

6. After the volume is deleted, right-click the icon again and then choose New Simple Volume... from the popped-up context menu. This will pop up a wizard to create a normal volume.

Disk Management: Convert Level-2 Storage to Normal Volume


Q: I get an error message saying "Failed to format this volume to a level-2 storage volume!" while I try to create a level-2 storage volume on a SSD with PrimoCache.

A: Firstly, check if you installed the version 2.4.0 or newer. Prior to version 2.4.0, dynamic disks are not supported, and prior to version 2.1.0, GPT disks are also not supported. Secondly, check if the partition is write-protected.