On Tue, 17 May 2016, Peter Kay wrote:
If the entire SSD device is missing on boot, the mdraid fails to exist
(/dev/md/mdcache is not present), saying it's inactive and the partition
device is a spare, thus causing the bcache to fail to exist also.
I didn't see this in your email, does this help?
https://help.ubuntu.com/community/Installation/SoftwareRAID#Boot_from_Degraded_Disk
Boot from Degraded Disk
If the default HDD fails then RAID will ask you to boot from a degraded
disk. If your server is located in a remote area, the best practice may be
to configure this to occur automatically:
edit /etc/initramfs-tools/conf.d/mdadm
change "BOOT_DEGRADED=false" to "BOOT_DEGRADED=true"
# Please provide URL to support claim: (this option is not supported from
mdadm-3.2.5-5ubuntu3 / Ubuntu 14.04 onwards)
Additionally, this can be specified on the kernel boot line with the
bootdegraded=[true|false]
You also can use #dpkg-reconfigure mdadm rather than CLI!
--
Mikael Abrahamsson email: swmike@xxxxxxxxx
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