Comments on: Calculation of Max LUN Supported in ESX Server http://malaysiavm.com/blog/calculation-of-max-lun-supported-in-esx-server/ Sun, 20 May 2012 14:57:50 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: craig http://malaysiavm.com/blog/calculation-of-max-lun-supported-in-esx-server/comment-page-1/#comment-1529 craig Mon, 27 Jul 2009 14:54:03 +0000 http://malaysiavm.com/blog/?p=889#comment-1529 Interesting finding from your end, but I am not sure whether they had fixed this in the latest patch or not, in my experience, we finally unplug 2 FC connection on our ESX host, and we able to present the extra LUN require. During that time, that is the feedback we received from VMware with the formula to calculate the available LUN per ESX host. Interesting finding from your end, but I am not sure whether they had fixed this in the latest patch or not, in my experience, we finally unplug 2 FC connection on our ESX host, and we able to present the extra LUN require. During that time, that is the feedback we received from VMware with the formula to calculate the available LUN per ESX host.

]]> By: titaniumlegs http://malaysiavm.com/blog/calculation-of-max-lun-supported-in-esx-server/comment-page-1/#comment-1516 titaniumlegs Sat, 18 Jul 2009 02:11:27 +0000 http://malaysiavm.com/blog/?p=889#comment-1516 Hi There I'm not seeing the same limits. I have 256 LUNs (IDs 0-255) presented to 3 ESX servers: - 2x Dell 1850, ESX 3.5u3, QLA2342 - 1x Dell 1950, ESX 4.0, QLA2462 Storage is NetApp FAS3070HA (2 controllers, 2 target ports each) Each server has 4 paths (dual port HBA, each port on a different Brocade 4100. Each FAS controller has a port on each switch.) ESX4 server sees 256 LUNs with 4 paths each. ESX 3.5 servers see almost all of the LUNs with 4 paths each, except LUN IDs 64, 128 and 192, which I find really weird. Also interesting is that 1, 65, 129, and 193 enumerate on the second path (vmhba0:1:x instead of vmhba0:0:x like all the rest). I don't know if this is a ESX3.5 thing or a QLA2342 thing. I'll play with it more later if I get the chance. Peter Hi There

I’m not seeing the same limits. I have 256 LUNs (IDs 0-255) presented to 3 ESX servers:
- 2x Dell 1850, ESX 3.5u3, QLA2342
- 1x Dell 1950, ESX 4.0, QLA2462

Storage is NetApp FAS3070HA (2 controllers, 2 target ports each)

Each server has 4 paths (dual port HBA, each port on a different Brocade 4100. Each FAS controller has a port on each switch.)

ESX4 server sees 256 LUNs with 4 paths each. ESX 3.5 servers see almost all of the LUNs with 4 paths each, except LUN IDs 64, 128 and 192, which I find really weird. Also interesting is that 1, 65, 129, and 193 enumerate on the second path (vmhba0:1:x instead of vmhba0:0:x like all the rest). I don’t know if this is a ESX3.5 thing or a QLA2342 thing.

I’ll play with it more later if I get the chance.

Peter

]]> By: craig http://malaysiavm.com/blog/calculation-of-max-lun-supported-in-esx-server/comment-page-1/#comment-575 craig Tue, 24 Feb 2009 14:41:08 +0000 http://malaysiavm.com/blog/?p=889#comment-575 I got a call with VMWare support today and confirm my thought on this post is correct. The physical connection of HBA on single ESX host will impact the total number of LUN to be able to present to single ESX host I got a call with VMWare support today and confirm my thought on this post is correct. The physical connection of HBA on single ESX host will impact the total number of LUN to be able to present to single ESX host

]]> By: craig http://malaysiavm.com/blog/calculation-of-max-lun-supported-in-esx-server/comment-page-1/#comment-570 craig Sat, 21 Feb 2009 05:32:01 +0000 http://malaysiavm.com/blog/?p=889#comment-570 Just to let you know, I am not using the HP device and SAN, I am also facing the same problem. My ESX servers is running Qlogic HBA card with EMC Storages Just to let you know, I am not using the HP device and SAN, I am also facing the same problem. My ESX servers is running Qlogic HBA card with EMC Storages

]]> By: Rodos http://malaysiavm.com/blog/calculation-of-max-lun-supported-in-esx-server/comment-page-1/#comment-569 Rodos Fri, 20 Feb 2009 11:16:36 +0000 http://malaysiavm.com/blog/?p=889#comment-569 The normal default for total number of paths on a server is 1024 but it looks like this driver has a much lower limit for some reason. For a general explanation of the storage maximums you can see http://rodos.haywood.org/2008/12/fc-storage-maximums-explained.html The normal default for total number of paths on a server is 1024 but it looks like this driver has a much lower limit for some reason.

For a general explanation of the storage maximums you can see http://rodos.haywood.org/2008/12/fc-storage-maximums-explained.html

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