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January 16th, 2013 03:00

Default storage pool configuration for VNX 5300

Dear colleagues,

What is the default storage pool configuration for VNX 5300 shipped with 8 X 600GB 15K SAS drives? Is it possible to use first four FLARE OE system disks (0-3) in storage pool with RAID5 (4+1) configuration with adding one additional drive to mentioned disks?

Thank you!

6 Operator

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January 16th, 2013 06:00

No – the vault drives cannot be used in a pool due to different free capacity

6 Operator

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8.6K Posts

January 16th, 2013 06:00

I assume you meant block pool and not file pool (AVM)

January 16th, 2013 08:00

Rainer_EMC, yes, I meant block storage pool or traditional RAID group. So these drives are completeley unusable in terms of block storage array and during solution sizing procedures we shouldn't take them into account? I will really appreceate if you provide links to documentation that contains information related to this question. Thank you!

6 Operator

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8.6K Posts

January 16th, 2013 09:00

You can use the remainder of these drive with traditional raidgroups

You just cannot use them to add to a block pool – a block pool needs complete disks

11 Legend

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January 16th, 2013 10:00

boot LUNs for ESX servers should be just fine, everything gets loaded into ESX memory so there is very little I/O.

January 16th, 2013 10:00

Rainer_EMC, thank you for the information! In case if I want to use these drives I will create Traditional RAID Group RAID5 (4+1) with adding one additional drive.

January 16th, 2013 10:00

dynamox, I just want to create LUNs for operating systems of virtualization servers (Boot from SAN).

11 Legend

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January 16th, 2013 10:00

do not put anything very i/o intensive on those LUNs, might impact array's overall performance.

January 16th, 2013 10:00

Actually I'm planing to use Windows Server 2008 R2 with a Hyper-V role. But I don't think that there is any significant difference in I/O behaviour of these two systems.

11 Legend

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January 16th, 2013 11:00

so you were planning on putting the root partition on these LUNs and child partitions would reside in the pool ? I remember there used to be a white paper that helps with Hyper-V and VNX architecture, i can't find it now.

January 16th, 2013 11:00

Maybe I read technical documentation/white papers not very carefully but I didn't find this information.

6 Operator

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January 16th, 2013 13:00

In the DOCUMENTS section of this forum, look for "EMC Unified Storage Best Practices for Performance and Availability - Common Platform and Block Storage 31.5 — Applied Best Practices.pdf" - in that document, see page 43 - the section called "DAE OS" - this explains about the limitations when using the OS drives (the first four disks).

glen

January 16th, 2013 13:00

glen, thank you for the mention of this document. There is also very important information regarding this topic in "System drive" section (page 64). It's a little bit confusing bacause this document contains information about Block OE 05.31 (this isn't latest version).

January 16th, 2013 13:00

dynamox, yes, I'm planning to put all VMs and their data to separate Storage Pools/LUNs. Thank you for information. It will be great if you find a link to this document.

January 16th, 2013 14:00

glen, I didn't find newer version of this document (probably it's not exist). At this moment everything is pretty clear for me. Thank you!

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