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8

Considering only the concepts involved at each layer of the stack and not the specific implementation, it could make sense for some applications to layer all of those three RAID modes. However the layout in the depicted diagram has a serious flaw. You have ordered the layers incorrectly. In order for optimal performance and reliability you have to swap the ...


4

I think this is pushing the boundaries of the RAID concept and you will run into trouble, will the PERC Controller allow you to add virtual disks to another Array? Won't each have its own write and cache policy, what is the cache size on your controller - anyway if performance is what you are after then have you looked at Ceph? -its certified to run on the ...


3

As you correctly state, all Azure disk storage (except for temporary disks) are replicated 3 times in the same DC, and if you use geo replication than another 3 times in another DC, so realistically disk failure is an unlikely cause. There are a few reasons I could think of that might explain this: As HopelesNoob mention, it could be data corruption, if ...


2

Very odd question - seemingly you don't know vSphere terribly well. It already allows for much of what you want - you can attach a range of storage to your hosts and move VMs between them as needed already - though you can't use CIFS. VMWare won't in itself manage and data replication but you can use it's built in Replication service to replicate whole VMs ...


2

Connections for a SAS-based HP P2000 or MSA2000 SAN to the host should be standard SAS SFF-8088 male connectors on both ends. If your HBA has a SAS SFF-8470 port (CX-4 Infiniband type), it's probably not the best HBA for this purpose. However you can just use the proper cable. Cost doesn't matter. SAS is a standard, so get whatever meets your needs.


1

I think the architecture you have in mind is overly complex without any reason I could think of. Essentially you are wasting 28 disks out of you 48 disk array for redundancy. The reason RAID6 was invented because many consider RAID1/RAID10 be too wasteful but you go even further applying RAID10 on top of RAID6. I would recommend either using RAID10 ...


1

More detail about your storage solution and the equipment involved would be helpful, as that dictates how you configure this. You have to go with the manufacturer/vendor's recommendation. Here's the VMware documentation. These are your options for the vSphere client:



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