Gordon Messmer wrote: > You didn't answer all of the questions I asked, but I'll answer as best > I can with the information you gave. > Manitu ate my email, *again*. > On 01/25/2017 04:47 AM, mark wrote: >> >> Made an md RAID 0 on the raw disks - /dev/sda /dev/sdb. No partitions, >> nothing. > > OK, so right off the bat we have to note that this is not a > configuration supported by Red Hat. It is possible to set such a system > up, but it may require advanced knowledge of grub2 and mdadm. Because <snip> > I sympathize. I wanted to use full disk RAID, too. I thought that <snip> Thank you. > >> However, when I bring it up, fdisk shows an MBR with no partitions. I >> can, however, mount /dev/md127p3 as /mnt/sysimage, and all is there. > > I assume you're booting with BIOS, then? Yup. > > One explanation for fdisk showing nothing is that you're using GPT > instead of MBR (I think). In order to boot on such a system, you'd need Nope. fdisk sees it as an MBR. The SSDs are only 128G. They just run the server, and the LSI card takes care of the 12 hot-swap drives.... <g> (It's a storage server.) > a bios_boot partition at the beginning of the RAID volume to provide > enough room for grub2 not to stomp on the first partition with a > filesystem. > > The other explanation that comes to mind is that you're using an mdadm > metadata version stored at the beginning of the drive instead of the > end. Do you know what metadata version you used? I took CentOS 7's default for mdadm. > >> Did I need to make a single partition, on each drive, and then make >> the RAID 1 out of *those*? I don't think I need to have /boot not on a >> RAID. > > That's one option, but it still won't be a supported configuration. Yeah, I see. Well, time to go rebuild, and this time with three separate RAID 1 partitions.... mark _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx https://lists.centos.org/mailman/listinfo/centos