Boot from degraded MD array

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Hi,

I wanted to know if there is a way to activate a degraded array be default.

 In a scenario where OS is installed on a MD R1 array, with no spares configured, if a physical drive fails is there a way to still boot in to OS, without having to configure a hot spare?
Also, is R5 different in any way, in the same scenario mentioned above ( R5 in degraded mode)?"

Setup: 
Create a R1 using 2 sata disks, using mdadm with SLES 11 SP1 Operating system.
Once OS is installed, shut down the system and fail a drive.  now try to boot up the OS.

OS boot fails because the RAID is inactive as the VD is degraded.


Regards,

Sushma Govind



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