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199 Posts

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A really basic question about the N2225 HBA

2019-07-29, 14:41 PM

Hello everybody. If I want to connect an x3650 M5 (5462) based hypervisor to another x3650 M5 (5462) using 24 hard drives to run MS Storage Spaces, would I need only one N2225 in each machine or would I need three? As I understand it, each N2225 has the ability to "see" 8 physical hard drives.

 

https://lenovopress.com/tips1175-n2225-and-n2226-sas-sata-hbas

 

Thank you!

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199 Posts

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Re: A really basic question about the N2225 HBA

2019-08-21, 13:29 PM

Hi arossett. There's no need for you to go any further with this.

 

I've since confirmed that while direct attached storage in FreeNAS is supported for hard disks to be used by the FreeNAS server itself, connections from external servers, say, a hypervisor, to FreeNAS can only be done via network.

 

Thanks anyway!

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601 Posts

08-14-2018

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Re: A really basic question about the N2225 HBA

2019-07-29, 16:06 PM

Hello John, quick question how are you connecting the drives? Will they be in a JBOD, or some type of disk enclosure?  Are you talking about connecting drives directly to the card? 

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199 Posts

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Re: A really basic question about the N2225 HBA

2019-07-29, 20:26 PM

Hi arossett. Thank you for chiming in.

 

The hard drives are installed in an x3650 M5 (5462) via JBOD controllers. I'd like to connect said server to another x3650 M5 (5462) server running ESXi via a single N2225 adapter in each server as a means of 12Gb connectivity.

 

Is that possible?

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199 Posts

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Re: A really basic question about the N2225 HBA

2019-08-14, 19:52 PM

Does anyone know if this is possible, or even advisable?

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Re: A really basic question about the N2225 HBA

2019-08-14, 22:14 PM

John, the issue here would not be a hardware limitation, but what I would be concerned with would be writing to the same disks via the different servers.  Without a traffic cop in place to say who owns what disks you would end up corupting the disks due to this. 

I am not a Vmware expert but I found this article that refernced someone looking for the same setup. 

 

https://community.spiceworks.com/topic/2023994-vmware-esxi-with-shared-sas-storage

 

I would probably attempt to post this out on the VMware forums to see if you can get their input on this as well. 

 

I also found this artilce that sounds like there might be a solution for you. 

 

https://kb.vmware.com/s/article/2129050

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199 Posts

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Re: A really basic question about the N2225 HBA

2019-08-15, 19:31 PM

Hello again, arossett. Thank you for the links. I've always found Spiceworks threads to be well worth reading.

Though, for whatever reason, I'm still not sure I completely understand what I need to do next. With that said, I'd like to further explain my situation.

I have three x3650 M5 (5462) servers. The first two are identical. They each run ESXi on a pair of mirrored 300GB spinning hard drives, and have no additional internal storage. The third server has 3, internal, JBOD HBAs, each of which have 8, 600GB spinning hard drives connected to them via direct connect backplanes, for a total of 24 disks. After stumbling upon another post in this forum explaining how Microsoft Storage Spaces requires a SAS expander, which are way too expensive, I'll be using FreeNAS instead.

What I'd like to know is, once FreeNAS aggregates the 24 hard drives via software, will a single, external, N2225 HBA in each of the three servers be enough to provide storage connectivity to the two ESXi hosts, or will all three servers need multiple N2225 HBAs due to each card being limited to 8 hard drives?

I hope that makes sense. If not, please let me know.

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Re: A really basic question about the N2225 HBA

2019-08-16, 20:34 PM

Hey John, thanks for clearing that up for me. I will need to run that past one of the RAID engineers to get their input.

 

My initial thought is that while FreeNas will aggregate the drives at the software level, the problem will be that at the hardware level you still have more than 8 drives. Which would cause you the need to have multiple HBA. 

 

I will try and reachout to the support team and follow up with you as soon as I have an answer. 

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199 Posts

11-17-2016

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  • Message 8 of 9

Re: A really basic question about the N2225 HBA

2019-08-21, 13:29 PM

Hi arossett. There's no need for you to go any further with this.

 

I've since confirmed that while direct attached storage in FreeNAS is supported for hard disks to be used by the FreeNAS server itself, connections from external servers, say, a hypervisor, to FreeNAS can only be done via network.

 

Thanks anyway!

0 person found this solution to be helpful.

This helped me too

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601 Posts

08-14-2018

United States of America

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  • Message 9 of 9

Re: A really basic question about the N2225 HBA

2019-08-21, 14:07 PM

John, thank you for following up with us to let u know the status.

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