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06-11-2019 04:40 AM
06-11-2019 04:40 AM
10 disk RAID 10 across 2 cages in ML350 G8p ??
I have a server as follows
J2Q95A HP ML350p Gen8p 8x SFF with P420i 512 (factory setup)
Later added P420 with 1GB cache along with an 2nd 8x SFF cage
I'm planning on ripping out the 300GB drives and replacing with 10x 1.2TB as can source them at a great price
Can I create 1 array across 2 cages?
I also have 2x 718139-001 800GB SSD
The plan is to run the HyperV host from the SSD mirror and have the Raid 10 to store the guests.
Is this even possible??
Cheers Robert
I am not sure if I can spread a 10 disk Raid 10 array across 2 cages?? They have individual controllers
I don't care about migration or how it is achieved as I'll restore everything from backups
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06-12-2019 08:05 AM
06-12-2019 08:05 AM
Re: 10 disk RAID 10 across 2 cages in ML350 G8p ??
Hi Rob,
It does not matter if the drives are in two different cages. You can go ahead and create raid. Theoretically its possible to run HyperV host from the SSD mirror and have the Raid 10 to store the guests.
Regards
Srinath
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06-12-2019 09:57 AM - edited 06-13-2019 02:32 AM
06-12-2019 09:57 AM - edited 06-13-2019 02:32 AM
Re: 10 disk RAID 10 across 2 cages in ML350 G8p ??
I think the question is if a single (hardware) array can be spanned across multiple controllers; so 2 controllers, 14 1.2TB disks, 1 RAID 10 array.
I don't think HPE (any) controllers can do controller-spanning arrays. I've certainly never worked with ones that can - but then apart from simple mirrors for OS I haven't done "hardware raid" in years.
You're looking at more modern technologies like ZFS or Windows Storage Spaces, which can absolutely do these kinds of things (even hybrid HDD + SDD deployments for tiered performance). In which case you don't really need "P" series HPE controllers with FBWC or BBWC. "E" series are fine because the "volume manager" handles protection from power outages etc.
PS: Software-based volume managers require that the disks are presented to the OS as-is, i.e. not behind some raid technology so you'd need to turn your current "P" series controllers to true HBA mode.
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06-12-2019 10:00 AM
06-12-2019 10:00 AM
Re: 10 disk RAID 10 across 2 cages in ML350 G8p ??
PS: If you're using Hyper-V, are you clustered? If so, check out Storage Spaces Direct (S2D).