To use NSS on the same drive that contains your boot volume and system volume, that drive must be managed by EVMS. The default volume manager in OES Linux is the Linux Volume Manager (LVM), not EVMS. Unless you make your Linux system volumes ( /boot, swap, and root ( /) partitions) manageable by EVMS, you cannot create NSS data volumes on that drive.
The simplest solution is to put your Linux system volumes on one device, then use different devices for your NSS volumes.
You must install Linux with EVMS as the volume manager of the system hard drive in either of the following scenarios:
Your system has a single hard drive and you want to use its free space for NSS data volumes.
Your system has multiple hard drives and you want to use free space for NSS data volumes from any drive that contains the Linux boot, system, or swap volumes.
For information, see
Installing Linux with EVMS as the Volume Manager of the System Device
in the
OES Linux Installation Guide.