On Sun, Jan 31, 2021 at 09:47:22PM +0300, Serge wrote:
> Hello.
> 
> I use 2 disks in mirror with root partition on softraid.
> Say they are sd0a and sd1a and SR is sd2.
> For example sd0 fails. I shutdown system, replace failed drive, 
> boot from good one, copy layout, rebuild array, all disks online 
> and system is up and running.
> Then sd1 fails. I shutdown system, replace sd1, power on and...
> 
> Using drive 0, partition 3.
> No O/S
> _
> 
> 
> Reading manuals, faqs and mailing lists led me to the following:
> I reproduce the issue and after replacement first failed drive run
> # installboot -v sd2
> 
> After that I can boot successfully from both drives.
> 
> Unfortunately I can not find this solution (is it a solution?) 

Yes, this is the right solution.

Installboot writes the bootloader to all chunks. If a chunk is replaced
with a fresh disk this disk won't carry a boot loader unless installboot
is run again.

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