Encrypted Volume and File System v2.2 Administrator Guide (777846-001, April 2014)

6 Configuring an EVS volume
This chapter describes how to configure an EVS volume after preparing EVFS for configuration.
This chapter addresses the following topics:
• “Configuration overview” (page 45)
• “Option 1: Creating a new EVS volume” (page 45)
• “Option 2: Converting a volume with existing data to an EVS volume (inline encryption)”
(page 55)
• “Examples” (page 59)
Configuration overview
There are two procedures to configure an EVS volume:
• Option 1: Creating a new EVS volume
This procedure creates a new EVS volume. Use this option to create an EVS volume on an
unused LVM, VxVM or physical volume. After you have created the EVS volume, you can
migrate existing data to the new EVS volume.
CAUTION: You cannot create an LVM or VxVM volume above an EVS volume.
You can create an EVS volume on an existing LVM, VxVM, or physical volume, but any existing
data on the volume is rendered unusable.
• Option 2: Converting a volume with existing data into an EVS volume (Inline Encryption)
This procedure converts a volume with existing data into an EVS volume using the inline
encryption feature.
IMPORTANT: To use inline encryption, 3 MB of spare disk space are required at the end of
the volume, and the minimum volume size must be 4 MB. If the entire volume is used, extend
the volume using lvextend for LVM, or vxassist for VXVM.
NOTE: The inline encryption process takes approximately 1.2 minute per GB on 4-CPU
rx4640. Actual performance times vary depending on usage and configuration.
Option 1: Creating a new EVS volume
This section describes how to create a new EVS Volume. This section addresses the following topics:
• “Step 1: Configuring an EVS volume” (page 45)
• “Step 2: Creating and mounting a file system on an EVS volume” (page 50)
• “Step 3: Verifying the configuration” (page 52)
• “Step 4: (Optional) Migrating existing data to an EVS volume” (page 54)
• “Step 5: Backing up your configuration” (page 55)
Before using this procedure, you must complete the tasks in Chapter 4 (page 28).
Step 1: Configuring an EVS volume
Use the following procedure to configure an EVS volume.
a. Create an LVM or VxVM volume for the EVS volume if you are not using whole disk access.
b. Create EVS volume device files by mapping the LVM, VxVM, or physical volume to EVFS.
c. Create the EMD area on the EVS volume.
Configuration overview 45