This report/issue is geared to those attempting to find a CentOS/RH for Sparc.
Currently, there is a slowdown to the development of CentOS for the Sparc platform. The current tftp64.img build for CentOS on Sparc does not have support for the low-cost Netra and Sunfire 1U servers, thus hinders any chance of this distro release being used for cheap hardware re-provisioning needs (i.e. basic web servers, database servers, etc).
In the past, there was a project called Aurora Sparc Linux, which was based on the Fedora platform. There are older builds still available, but these are rather ancient in comparison to today's kernel and driver updates.
Upon doing a bit of in-depth research, I did discover that Ubuntu did release a Sparc build under their v7.10 distro, which supports many older as well as new Sparc-based platforms including the low-cost Netra and Sunfire 1U servers. These special servers require the 'eri' driver commonly called the SunGEM driver.
I did, however, stumble upon a 'Fedora Secondary' project which does have actual images and CD/DVD/NetBoot ISO builds available and is based on the Fedora 9 distro.
http://archives.fedoraproject.org/pub/fedora-secondary/releases/test/9-B eta/Fedora/sparc/iso/
Upon initial testing, I found that the test ISO and the TFTP images do support the low-cost Netra and Sunfire 1U servers as well as other platform, but there seems to be an issue when it comes down to creating the actual disk environment. Out of five tries, three of them tried to create an 'ext2' disk build-out even when ext3 was specified. The remaining two would place the disks in a read-only status -- and even using a rescue boot CD -- failed to restore these to a read-write capability.
I recommend to those looking at trying out a RedHat-based distro for Sparc, to look at this build. It might provide some guidance for the CentOS development team going forward for future platform releases.
-- Michael