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Getting the most total space out of an eva8000

 
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Super Advisor

Getting the most total space out of an eva8000

I am looking at getting the most usable space out of an eva8000.

I have seen there is 1TB FATA disks, and this seems to be the best growth for the cost.

We currently have an eva8000 with 8 enclosures. They have the 146GB FC 15k disks in it currently. We are also soon to add an iSCSI connectivity option to it.

We are wanting to have 100 clients use iSCSI to get image files from the EVA over a GB network. About 30 clients will concurrently access the array to pull files ranging from 600MB to 5GB.

What upgrades or options should I look at?

Should we upgrade the controllers of the eva to 8100s? Should we upgrade to 4GB connectivity? More cache?

For the initial investment, what does it take (what do I need to purchase) to be able to add the FATA disks to my current environment? What enclosures, connectivity options, etc? Also is there a limit on how many FATA disks I can add? Can they co-exist with the FC disks?
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Honored Contributor
Solution

Re: Getting the most total space out of an eva8000

Hi,
here are the docs which could help you:

EVA 4/6/8k iSCSI connectivity guide
http://bizsupport.austin.hp.com/bc/docs/support/SupportManual/c01519273/c01519273.pdf

EVA 4/6/8k Hardware config guide
http://bizsupport.austin.hp.com/bc/docs/support/SupportManual/c01364500/c01364500.pdf

EVA 4/6/8k User guide
http://bizsupport.austin.hp.com/bc/docs/support/SupportManual/c01492137/c01492137.pdf
here the FATA disks notes starts on page 39
and there is a following link:
http://h71028.www7.hp.com/ERC/downloads/5982-7353EN.pdf
FATA/SATA/PATA/FC disks comparison and notes
the pain is one part of the reality
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Honored Contributor

Re: Getting the most total space out of an eva8000

First... Keep in mind that FATA disks are NOT meant to be "online" 100% duty cycle. They are referenced as "Near-Online" storage.


Simply put, you can add FATA disks now to your EVA 8000. You do not need any more hardware than you already have, except of course if you do not have any available disk slots on your existing 8 shelves.

FC disks can co-exist with FATA disk in the same array, but NOT in the same disk group.

Whether or not you need to upgrade the EVA to an 8100 is best left to a Storage Assessment. Without knowing exactly what your storage is doing currently, there really is no way for someone to say "yes" you should upgrade or "no" it's not needed. (Unless you are talking to a sales person).

Steven
Steven Clementi
HP Master ASE, Storage, Servers, and Clustering
MCSE (NT 4.0, W2K, W2K3)
VCP (ESX2, Vi3, vSphere4, vSphere5, vSphere 6.x)
RHCE
NPP3 (Nutanix Platform Professional)
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Valued Contributor

Re: Getting the most total space out of an eva8000

The FATA disks are lowest cost per giga byte of any disk available for the EVA8x00. The reason is they are lower performance, and less reliable. You get what you pay for. I think they only spin at 5,400 RPM. They are designed for "Near Line" storage, not "Online" storage.

The 146 GB FC 15k disks you currently have are the highest performance and reliability.

As Steven said, you need a performance assessment to know how utilized your EVA is now, before you can determine if you need an upgrade. You can use EVAperf, doble click icon thenâ ¦

EVAperf> evaperf as -cont

To see your total I/O per second and total mega bytes per second. The iSCSI maximum is 1 Giga bit per second, due to Ethernet overhead, the actual maximum throughput is around 0.7 Giga bit per second, thus the bottleneck is the Ethernet network.

All you need to purchase is a minimum of 8 drives to be able to create a new disk group. FATA and FC disks cannot be in the same disk group. (As Steven said, as long as you have empty slots available).

If you don't have any empty disk slots (bays), then you will need to purchase a disk enclosure upgrade, which usually includes all the necessary cables. I believe the maximum number of disk drives for one EVA is 240, this requires to racks for a total of 18 disk enclosures.

As mentioned earlier, FATA and FC can coexist in the same EVA as long as they are in separate disk groups.


Regards,

Tim


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Super Advisor

Re: Getting the most total space out of an eva8000

Ok great, thank you!

While I realize the fata disks are slower and less reliable, what does near online mean?

If this array is hardly hit performance-wise and is going to have say 20 users pulling a few GB files over iSCSI throughout the day, can fata handle that without the array being the bottleneck, minus the fact its not as reliable?
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Honored Contributor

Re: Getting the most total space out of an eva8000

'near online' suggests something "between":
'online (disk storage) and
'offline' (tape storage).

You should be fine with 20 users and a few GB, but you do realize that this is different from your original request?
""We are wanting to have 100 clients...
About 30 clients will concurrently access the array to pull files ranging from 600MB to 5GB.""
.
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Honored Contributor

Re: Getting the most total space out of an eva8000

Hi,
in the article, which link I have posted in my 1st post, there is a good summary of the FATA disk usage

http://h71028.www7.hp.com/ERC/downloads/5982-7353EN.pdf
the pain is one part of the reality
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Super Advisor

Re: Getting the most total space out of an eva8000

Yeah, we will have a 100 total users. However at a time its probably max 20-30 users. They would be on a GB ethernet network using iSCSI targets on the array and SAN to copy files that are a few GB (max 6gb) in size.

Concurrently, it may even be as low as 5-10 users, but id say 20-30 is more accurate.

I just didnt know if fata would keep up with that. I would also probably make the most active users and targets on the FC disks, however to get the total storage I need affordably and right now, I would consider FATA.

I will go read the link in more detail now, thank you.
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Super Advisor

Re: Getting the most total space out of an eva8000

Another quick question.

We have 4 loop-back switches right now with 2 eva8000 controllers and 8 disk enclosures.

If I wanted to add say another 2 disk enclosures, do I need to add anything else? Will 4 loop-back switches support 10 enclosures, or more? Any other cables or other accessories needed?
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Honored Contributor

Re: Getting the most total space out of an eva8000

From the sound of it, you can probably reliably run FATA disks and not have any issues.

The 4 loop switches should be able to handle at least 1 full EVA rack (12 shelves) as well as 6 shelves in an expansin rack. The shelves come with cables to connect to the switches, as well as a CAN bus cable to attach the shelf's EMU to the cabinet bus.


Steven
Steven Clementi
HP Master ASE, Storage, Servers, and Clustering
MCSE (NT 4.0, W2K, W2K3)
VCP (ESX2, Vi3, vSphere4, vSphere5, vSphere 6.x)
RHCE
NPP3 (Nutanix Platform Professional)