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Manual Chapter: Disk Management for Datastor
Manual Chapter
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About disk management

You can use disk management to allocate dedicated disk space for the datastor service, which increases the data storage that BIG-IP® WOM® uses for deduplication. Additional disk space is available in the following deployments.

  • Selected higher-end BIG-IP WOM platforms support the use of solid-state drives (SSDs) that come in a dual-disk drive sled and are installed along with hard disk drives.
  • If you are installing BIG-IP WOM Virtual Edition, you can select an extra disk deployment configuration.

The following figure shows the Disk Management screen in a BIG-IP WOM 11000 platform that has SSDs installed. In this example, datastor is still on the primary disk; it has not been allocated to the SSDs.

Example of the Disk Management screen Example of the Disk Management screen

Provisioning solid-state drives for datastor

Before beginning this procedure, you must have licensed WAN Optimization Manager™ (WOM®).
By default, datastor, which is the data storage used for optimization, is provisioned on the primary hard disk drive (HDD). To use solid-state drives (SSDs) on BIG-IP® WOM, you must manually allocate the disk space on each SSD to the datastor service. If you install SSDs after you have provisioned WOM, you must first de-provision WOM, and then delete the datastor application volume from the primary disk, before you assign the datastor service to the SSD volume.
  1. On the Main tab, click System > Resource Provisioning.
  2. In the Resource Provisioning (Licensed Modules) area, from the WAN Optimization (WOM) list, select None (Disabled).
  3. Click Update.
  4. Click OK to proceed. The BIG-IP system restarts without WOM in the configuration, which might take a minute or so.
  5. Click Continue.
  6. On the Main tab under System, click Disk Management.
  7. If the Logical View shows Datastor allocation on HD1, delete it by performing the following steps. If datastor is not allocated to HD1, skip this step.
    Note: Datastor does not span the primary disk and the SSDs. If datastor is allocated to the primary disk, it will not use the SSDs.
    1. Click the disk label, for example HD1. The General Properties screen opens for the logical disk you selected.
    2. In the Contained Application Volumes area, select the check box for Datastor, and click Delete.
  8. On the Disk Management screen, click the SSD disk label, for example, SSD1. The General Properties screen opens for the logical disk you selected.
  9. For the Mode setting, select Datastor. The following figure shows the Datastor option selected.
    Example of Logical Disk screen with Datastor selected Example of Logical Disk screen with Datastor selected
  10. Click Update.
  11. Repeat the datastor selection steps for each SSD displayed on the Disk Management screen.
  12. On the Main tab under System, click Resource Provisioning.
  13. In the Resource Provisioning (Licensed Modules) area, from the WAN Optimization (WOM) list, select Nominal.
  14. Click Update.
  15. Click OK to proceed. The BIG-IP system restarts with WOM in the configuration, which might take a minute or so.
  16. Click Continue.
The datastor service is now allocated to the SSDs. The datastor volume spans the installed SSDs. You can verify the result by checking the Disk Management screen. The logical view displays the datastor allocation for each disk.

Monitoring SSD usage

If you are using solid-state drives (SSDs) for datastor, you can view the SSD allocation and monitor the SSD lifespan.
  1. On the Main tab under System, click Disk Management.
  2. Use the Disk Management screen to view details about the SSDs, including the following.
    • To view the general properties of a disk, in the Logical View area, click the disk label.
    • In the Physical View area, note which bays contain the SSDs.
    • In the Data Disks area, view the Media Wearout Indicator to monitor disk usage.
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