I rebooted and checked each step again. One big difference is this time on reboot, my installer USB drive was not sd0 as in my last install attempt. My RAID1 devices now were sd0 and sd1. After running through all the RAID prep steps, the install went without incident.
Thanks for your help, EZ > On Apr 29, 2018, at 8:58 AM, Eric Zylstra <ezyls...@mac.com > <mailto:ezyls...@mac.com>> wrote: > > Interesting. I’ll look into that. Not sure why installboot, upon seeing an > error condition (missing MBR), would not generate an error but instead try > another device. > > EZ > > >> On Apr 29, 2018, at 8:54 AM, Joel Sing <j...@sing.id.au >> <mailto:j...@sing.id.au>> wrote: >> >> On Saturday 28 April 2018 22:21:08 Eric Zylstra wrote: >>> I’m installing 6.3 on a RAID1. Install was fine until ending with an error >>> message, “invalid boot record signature…”. >>> I manually ran installboot: >>>> . installboot -v -r /mnt sd4 >>> >>> Hand transcription: >>> >>> Using /mnt as root >>> Installing bootstrap on /dev/rsd4c >>> Using first-stage /mnt/usr/mdec/biosboot, second-stage /mnt/usr/mdec/boot >>> sd4: softraid volume with 2 disk(s) >>> sd4: installing boot loader on softraid volume >>> /mnt/usr/mdec/boot is 6 blocks x 16384 bytes >>> sd0a: installing boot blocks on /dev/rsd0c, part offset 144 >>> Master boot record (MBR) at sector 0 >>> Install boot: invalid boot record signature (0x0000) @ sector 0 >>> >>> I did not typo the secondary boot block install. It attempts to install on >>> sd0 instead of sd4 as specified in my command. >> >> In order to boot a softraid volume, the underlying disks have to be bootable >> with the first stage boot block being installed in the MBR (at least for >> i386/amd64). This is why it's looked at sd4, then gone to install the first >> stage boot block on sd0... however there is no MBR on this device to install >> it into. This suggests that you've not run fdisk correctly - but with >> insufficient details I can only guess. >
