How to switch datastore from direct attached MD3600i to SAN MD3600i
Hello everyone, I tried to find an article or whitepaper or even just a blog about how to do this but no luck. I'm hoping someone here has done this and can give me some insight as to the best way to...
View ArticleRe: Lun Offset Question - NetApp Filers
You have to create an optimized datastore for each different offset. Why don't you use the VSC Optimization and Migration "Scan Manager"? It will help you (a little bit...) to find out the needed offsets.
View ArticleRe: Lun Offset Question - NetApp Filers
Maybe Im missing something, but VSC doesnt list out the offsets of the actual VM's/VMDK's. There are Misaligned > Online Migration > Group 1, 2, etc... but nothing that tells me the offset....
View ArticleShared storage recommendations for 3xESXi 5.1 host cluster
Hey all I was hoping for some opinions on the various shared storage options using real world (you guys) performance experience. I have a 3 x ESXi cluster (VMware Standard) and a storage requirement of...
View ArticleRe: Shared storage recommendations for 3xESXi 5.1 host cluster
Hi Basically a HP P2000 MSA G3 or a Dell PowerVault MD3xxx would be sufficient. We got a lot of customer who are happy with their entry SAN solution. Both can be extended via additional SAS shelf and...
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Re: How to determine if xcopy is being utilized for storage vmotions
Hi esxtop (press, u,f and add VAAI stats "o") is able to show you some VAAI stats. I'm not 100% sure but CLONE_RD (Reads) and CLONE_WR (Writes) should be able to show you if VAAI is being utilized.If...
View ArticleRe: How to determine if xcopy is being utilized for storage vmotions
Great thanks for the info. That helps me if I am running esxtop while the svmotion is taking place. But what if I need to know after it happened whether xcopy was used? Or how can I tell based on...
View ArticleRe: How to determine if xcopy is being utilized for storage vmotions
No way to know after the fact. Before the fact, you could make sure that the host shows the storage as VAAI capable, and that the transfer meets all the requirements for a XCOPY accelerated xfer.
View ArticleRe: Lun Offset Question - NetApp Filers
Hi, a mouseover at the concerned VMs should display you the wanted information (VSC - Optimization and Migration - Virtual Machine Aligenment - Misaligned). I wrote a short article about the alignment...
View ArticleRe: Shared storage recommendations for 3xESXi 5.1 host cluster
Hi there Thanks for your response, I had not looked into the HP P2000 G3's - I see they do a iSCSI / FC model (HP P2000 G3 FC/iSCSI MSA DC) which looks perfect for our needs, do you have any idea of...
View ArticleRe: Shared storage recommendations for 3xESXi 5.1 host cluster
Hi Both models should be within your budget, just contact some re-sellers to get some quotes. Personally I would recommend the SFF model with SAS drives. You don’t want end up with lots of TBs of...
View ArticleRe: Lun Offset Question - NetApp Filers
Great write up.... and you're correct with highlighting over the VM to find its offset. But Im not sure what offset 4, 7, etc are. I have some misaligned luns under offline alignment that have multiple...
View ArticleExplanation of Shared Storage [newbie]
I'm new to storage and vSphere, but I've been doing quite a bit of reading and I have been working my way through vSphere pretty well. However, I'm kind of confused about something in the...
View ArticleRe: Explanation of Shared Storage [newbie]
chadmichael wrote: How can that be shared then? Wouldn't it cause data corruption to have two hosts with block level access to a given device? For most operating systems and filesystems, that wouldbe...
View ArticleRe: Explanation of Shared Storage [newbie]
Thanks. That's kind of what I was vaguely suspecting. So, where does the sharing take place? Is the storage attached to both hosts? Or is just attached to one host, and then shared in the vSphere?
View ArticleRe: Explanation of Shared Storage [newbie]
The storage is generally (there are excpetions to this) attached to each host. The mediation on who can write when/where is accomplished by holding locks on various parts of the filesystem.
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Re: How to know any particular LUN is attached to how many hosts and which...
any command ?? -> Yes, "Ask the Storage guys!" If you need to find out about this on the vSphere side, take a look at e.g....
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How to interpret attached device information
So, I'm new to this. But I've read the docs I have two esxi hosts, physical, that I've pulled into my vCenter. I'm trying to cluster them and configure them with storage to support an evaluation...
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