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тАО08-09-2004 11:12 PM
тАО08-09-2004 11:12 PM
Other than RAID levels and max storage capacity .. whats the major difference between ..say VA7xxx and EVA series(Say EVA3000) of products?
both are end-to-end Fibre
Regards ,
Vipul Bhadra
Solved! Go to Solution.
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тАО08-10-2004 03:01 AM
тАО08-10-2004 03:01 AM
Re: Difference between VA and EVA
1. In VA74xx you have one (VA7110) or two (7410) redundancy group and one raid level for all of them - EVA has disk groups which can have different raid level-s
2. EVA has Continuous Access
3. EVA has Snapshots and Snapclones
etc...
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тАО08-10-2004 04:50 AM
тАО08-10-2004 04:50 AM
Re: Difference between VA and EVA
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тАО08-10-2004 09:06 AM
тАО08-10-2004 09:06 AM
Re: Difference between VA and EVA
Not sure if the VA has RSS.
Steven
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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тАО08-10-2004 03:53 PM
тАО08-10-2004 03:53 PM
Re: Difference between VA and EVA
IBM fastt groups disks in arrays out of which virtual disks are made out (Each array has one raid level .. say RAID 1,0 or 5 ).. and then logical disks are created in this array. Each of this logical disk can be assigned to a controller.
Do both VA and EVA operate similarly?
Are there any document(Other than quickspecs..say userguide) which will simplify things for me?
Thanks for the help.
Regards,
Vip
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тАО08-10-2004 04:23 PM
тАО08-10-2004 04:23 PM
Re: Difference between VA and EVA
Access this link to view all the documents for VA
http://h20000.www2.hp.com/bizsupport/TechSupport/DocumentIndex.jsp?contentType=SupportManual&locale=en_US&docIndexId=179911&taskId=101&prodTypeId=12169&prodSeriesId=89018.
Also, the following link will take you to additional information for VA:
http://h20000.www2.hp.com/bizsupport/TechSupport/Home.jsp?%20locale=en_US&prodTypeId=12169&prodSeriesId=89018
Access the following link for documentation on EVA 5000
http://h20000.www2.hp.com/bizsupport/TechSupport/DocumentIndex.jsp?contentType=SupportManual&docIndexId=3124&locale=en_US&prodTypeId=12169&prodSeriesId=321347
Access the following link for documentation on EVA 3000:
http://h20000.www2.hp.com/bizsupport/TechSupport/DocumentIndex.jsp?contentType=SupportManual&docIndexId=3124&locale=en_US&prodTypeId=12169&prodSeriesId=315127
I hope this helps.
Regards
Rithu Kumble
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тАО08-10-2004 05:40 PM
тАО08-10-2004 05:40 PM
SolutionNo, I don't think so. A RSS is used to limit a failure domain. VRAID-5 stripes (4D+P) never span two RSS I have been told. So if you have two RSS, you can withstand one disk failure per RSS = 2 disk failures per disk group.
It's been too long that I looked at the inner workings of the VA to remember if it has something like RSS. By default the VA uses striped mirrors, but it can be switched to AUTORAID mode. In that case the array decides what data to store as RAID5DP (DP = double protection, so it can tolerate the failure of two disks).
Vipul:
The EVA and the VA do not work like the IBM. From the description it sounds like you create a disk array and this one is initialized with a RAID-level. Then you partition this container into multiple logical disks.
On the EVA you bind multiple disks together to form a disk group. This is a storage pool out of which you can draw capacity for your virtual disks. I have already written above that you can have different virtual disks with different VRIAD levels in the same disk group.
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тАО08-10-2004 11:04 PM
тАО08-10-2004 11:04 PM
Re: Difference between VA and EVA
That is exactly how I understood the technology to work, except that I did not go into detail.
Steven
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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тАО08-10-2004 11:31 PM
тАО08-10-2004 11:31 PM
Re: Difference between VA and EVA
my apologies, but that is not what I had read from your description. You wrote that RSS 'is sort of like RAID5 protection in theory'.
RAID-5 is about redundancy, protecting data from a (single) disk failure.
RSS is about failure domains within one EVA disk group.
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тАО08-11-2004 03:07 AM
тАО08-11-2004 03:07 AM
Re: Difference between VA and EVA
I really need to take the time and xplain myself better. Unfortunately, I sometimes quickly answer with little time to actually post a full message.
Sorry for the confusion.
Steven
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)