I am attempting to setup some secondary storage per 
https://www.qubes-os.org/doc/secondary-storage/ and when I run " sudo 
cryptsetup luksFormat --hash=sha512 --key-size=512 --cipher=aes-xts-plain64 
--verify-passphrase /dev/sdc" I get "Device /dev/sbc doesn't exist or access 
denied". It's there in a dom0 terminal when I type "ls /dev/sb*" I am assuming 
sba is the boot raid1 and sbb is the ROM drive. 

My boot drive is an SSD RAID1 on an Intel embedded controller, standard stuff. 
The drive I want to add is attached to an embedded LSI SAS controller. I can 
attach the sbc device to a VM easy enough but it seems I am missing a step to 
make it dom0 aware. I am running an up-to-date Qubes 4.x installed on a 
SuperMicro serverboard, Xeon something or other (4-core, 3.4GHz) with 32GB RAM 
(retired ESXi host). I think it is booting with GRUB. 

FULL DISCLOSURE: I am a *nix newbie really. I've played with embedded *nix, 
built my share of ESXi boxes and what not, but not really dug into the nuts and 
bolts of it like I've have been since installing Qubes, which I think is 
fantastic for its purpose. I want to commit to Qubes as my primary box but I 
really need to understand it first, especially, ahem, disaster recovery. I have 
not run a Linux desktop for any significant length of time prior to this either 
- mostly M$ (since the IBM model 5150), a wee bit of OS/2 Warp (the best 
multi-node PCBoard BBS host evah!) and a brief fling with the Mac OS before 
they went to Intel chips. 

Yes, I could just go buy a bigger pair of SSDs and restore a backup to them, 
but then I won't really learn anything and I'll be a wee bit poorer for it. 

Thanks. 

DG 

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