Re: Ceph osd will not start.

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> 
> I'm attempting to use cephadm and Pacific, currently on debian buster,
> mostly because centos7 ain't supported any more and cenotos8 ain't
> support
> by some of my hardware.

Who says centos7 is not supported any more? Afaik centos7/el7 is being supported till its EOL 2024. By then maybe a good alternative for el8/stream has surfaced.

> Anyway I have a few nodes with 59x 7.2TB disks but for some reason the
> osd
> daemons don't start, the disks get formatted and the osd are created but
> the daemons never come up.

what if you try with 
ceph-volume lvm create --data /dev/sdi --dmcrypt ?

> They are probably the wrong spec for ceph (48gb of memory and only 4
> cores)

You can always start with just configuring a few disks per node. That should always work.

> but I was expecting them to start and be either dirt slow or crash
> later,
> anyway I've got upto 30 of them, so I was hoping on getting at least get
> 6PB of raw storage out of them.
> 
> As yet I've not spotted any helpful error messages.
> 
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