CONFIG_OBS600 is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc
default or selected kernelversion does not have config value CONFIG_OBS600.
Result is shown for kernelversion 6.9.9

OpenBlockS 600

configname: CONFIG_OBS600

Linux Kernel Configuration
└─>OpenBlockS 600
In linux kernel since version 3.1 (release Date: 2011-10-24)  
This option enables support for PlatHome OpenBlockS 600 server