Stephen John Smoogen <smooge at gmail.com> wrote:> OK I am going with documentation not being right and/or I have been > very lucky with my installs.If you read https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/installation_guide/sect-disk-partitioning-setup-x86#sect-bootloader-mbr-gpt-x86 carefully, it seems to say that if you have UEFI and an MBR hard disk that already has partitions, you must reformat it to GPT. The documentation seems to say that Anaconda will use MBR only if the disk is the right size (fewer than 2^32 sectors) *and* has no partition. -- Yves Bellefeuille <yan at storm.ca>
On 15 February 2018 at 18:29, Yves Bellefeuille <yan at storm.ca> wrote:> Stephen John Smoogen <smooge at gmail.com> wrote: > >> OK I am going with documentation not being right and/or I have been >> very lucky with my installs. > > If you read > https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/installation_guide/sect-disk-partitioning-setup-x86#sect-bootloader-mbr-gpt-x86 > carefully, it seems to say that if you have UEFI and an MBR hard disk > that already has partitions, you must reformat it to GPT. > > The documentation seems to say that Anaconda will use MBR only if the > disk is the right size (fewer than 2^32 sectors) *and* has no > partition. >I am guessing because my drives were blank and smaller than 2 TB that it defaulted to MBR even when the system had a UEFI BIOS (as long as the firmware is in legacy mode). What is the partition table of the drive you are trying to install to?> -- > Yves Bellefeuille > <yan at storm.ca> > > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos-- Stephen J Smoogen.
Stephen John Smoogen <smooge at gmail.com> wrote:> I am guessing because my drives were blank and smaller than 2 TB that > it defaulted to MBR even when the system had a UEFI BIOS (as long as > the firmware is in legacy mode).Right, the problem seems to arise if you already have partitions on your MBR disk. Perhaps Fred Smith can confirm this.> What is the partition table of the drive you are trying to install > to?MBR, 240 GB (an SSD), with CentOS 6 already installed on a partition. (There are also other partitions.) -- Yves Bellefeuille <yan at storm.ca>