AX4-5F Alignment Offset -DISABLED-

AFAIK LUN's presented to ESX and formatted as VMFS are automatically aligned, so you don't need to align them yourself ! furthermore: aligning from within Navisphere is not recommended... let me rephrase that: it's a best practice to do the alignment from within the OS. For Windows 2k, 2k3 you'd need to use diskpart "create partition primary align=64" or something, but on ESX it's even simpler, sicne ESX does it for you. And I believe, but I'm not 100% sure, that Windows 2k8 uses an alignment of 1MB by default, so no need for aligning yourself there anymore as well

Aligning on both sides doesn't hurt, but it's not preferred. I will try to look up some document for you, but you can leave the LUN-side aligning out.

brb

https://powerlink.emc.com/nsepn/webapps/btg548664833igtcuup4826/km/live1/en_US/Offering_Technical/White_Paper/H2358_clariion_best_prac_fibre_chnl_wp_ldv.pdf

Page 9: "Correcting alignment problems" says: "use only 1 method, not both".

Hi RRR,

Thanks for your reply, but i think that it's necessary to set "offset Alignment" in both sides, array and host. Can you corret me if i'm mistaked?

I'm know than ESX server do automatically the align to 64 in VMFS but it's necessary do it in array. I think.

Thanks RRR

In Win2k8 it's now 2MB: https://forums.emc.com/forums/thread.jspa?tstart=0&threadID=134851

Hi RRR,

I've read your document and it seem you're right, in that case, always, i must leave at 0 the field alignment offset in LUN's configuration and only configure in host side??


PD: In AX-Series alignment offset is not supported at least in Navisphere CLI command.

Thanks

Indeed, just leave it zero. That means no offset.

By the way: could you "reward" the most valuable answer in this post, so others can quickly find the right answer to the question ?
The correct answer is equal to 10 points and at the most 2 helpful answers are 6 points. This way you can reward 3 answers with points, you think are the most valuable.