[cisco-voip] C240M3 16 drives for CUCM/UCCE

[Ryan Ratliff (rratliff)]

To answer the original question, the two RAID5s is purely do to rebuild times in case of a failed disk.  I suspect the factory pre-install for BE7K also came into play here since it's based off of that TRC.  The flexflash was useful for ESXi but we aren't disk space limited in TRCs so there isn't that much to be gained that I'm aware of.

We specifically got rid of the RAID1 for ESXi because it wasted two disk spindles for the app that loads and runs entirely out of RAM.

I can't speak to the lack of RAID10 on TRCs.  I suspect it's because we don't need it for iops and that anyone really passionate about it will be specs based anyway.

Do keep in mind that when you deviate from the official TRC you are technically specs based, with the additional support requirements that entails.  That cost to the customer has to be considered, especially if they get into an ugly performance problem.

-Ryan

On Sep 5, 2014, at 10:11 AM, Haas, Neal <nhaas at co.fresno.ca.us<mailto:nhaas at co.fresno.ca.us>> wrote:

Raid 10 all of the way! We have 4 C240’s. (Setup 2 Raid 5’s – then create them into a Raid 10. There is no button that just says create a Raid 10 from the bare drives.)


Neal Haas
IT Analyst, Communications
From: cisco-voip [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Mike Hyde
Sent: Thursday, September 04, 2014 9:22 PM
To: Jason Aarons (AM)
Cc: cisco-voip (cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>)
Subject: Re: [cisco-voip] C240M3 16 drives for CUCM/UCCE

We used SD flash disks for esxi (mirrored) and 2 raid 5 sets for the vms.

Sent from my iPhone

On Sep 4, 2014, at 10:31 PM, "Jason Aarons (AM)" <jason.aarons at dimensiondata.com<mailto:jason.aarons at dimensiondata.com>> wrote:
We have had customers have more than a single drive failure in a Raid5 set with all your vms running.  It was pretty.

So perhaps 2 drives raid 1 for ESXi and ISOs, 7 drives raid 5 for vms, 7 drives raid 5 for vms

But yeah the existing layout seems odd….but I do what it says…but I’m not sure where the contact center bu gets these setups from.

Jason Aarons
Consultant
Dimension Data
+1-904-338-3245

From: Charles Goldsmith [mailto:wokka at justfamily.org]
Sent: Thursday, September 04, 2014 8:16 PM
To: Jason Aarons (AM)
Cc: cisco-voip (cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>)
Subject: Re: [cisco-voip] C240M3 16 drives for CUCM/UCCE


Personally, I wouldn't leave a system in that format, it's a waste of space.  Cisco's docs seem to change because at one point, the docwiki specified that it could be built in either a raid 5 or raid 10 (for the app storage), but that has been updated.

I'd personally setup a mirror with the first two for ESXI and then a raid 10 with the remainder drives.  You get more IOPS out of it and should have plenty of space.

On Thu, Sep 4, 2014 at 4:47 PM, Jason Aarons (AM) <jason.aarons at dimensiondata.com<mailto:jason.aarons at dimensiondata.com>> wrote:
C240M3  TRC setup
8 drives raid 5 group 1
8 drives raid 5 group 2

Seems like an odd setup to have the hypervisor running on a Raid 5 array.
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/virtual/CUCM_BK_CF3D71B4_00_cucm_virtual_servers/CUCM_BK_CF3D71B4_00_cucm_virtual_servers_chapter_010.html

Do you install Virtual Machines to both Raid5 arrays, or just ESXi on one and the VMs on the other?

Customer asked me why Cisco would have ESXi  installed on a 1.93TB raid 5 array vs having two drives in Raid 1 mirror.  I told them I would ask around.


Jason Aarons
Consultant
Dimension Data
+1-904-338-3245<tel:%2B1-904-338-3245>


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