default or selected kernelversion does not have config value CONFIG_I2O_BLOCK.
Result is shown for kernelversion 6.5.1

I2O Block OSM

modulename: i2o_block.ko

configname: CONFIG_I2O_BLOCK

Linux Kernel Configuration
└─>Device Drivers
└─>I2O device support
└─>I2O Block OSM
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Include support for the I2O Block OSM. The Block OSM presents disk
and other structured block devices to the operating system. If you
are using an RAID controller, you could access the array only by
the Block OSM driver. But it is possible to access the single disks
by the SCSI OSM driver, for example to monitor the disks.

To compile this support as a module, choose M here: the
module will be called i2o_block.

source code: