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тАО01-16-2012 08:54 AM
тАО01-16-2012 08:54 AM
Boot from MSA2012SA
Hi all
In the company we have a MSA2012SA SAN. I have Proliant DL360 G5 multiple servers that are installed SC08Ge HBA controller each.
I want to install W2K8 R2 servers booting from SAN. In the SAN I created a virtual hard disk divided as follows and I assigned all the LUN to the HBA on the test server:
* LUN 2 - 250GB
* LUN 3 - 64GB
* LUN 12 - 128 GB
* LUN 13 - 128 GB
* LUN 14 - 200 GB
When the server starts only appear LUN 2 and 3 on the controller. The Windows installation program shows me the 5 LUN, but only lets me install on the LUN 2 and 3. Why?
In this scenario the installation works without problems if I use one of two LUN showing in the beginning but as I have to install more servers, I probably need higher LUN ID and will not work for the initial installation.
Any ideas?
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тАО01-16-2012 10:35 AM
тАО01-16-2012 10:35 AM
Re: Boot from MSA2012SA
Regards,
Sebastian
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тАО01-18-2012 09:30 AM
тАО01-18-2012 09:30 AM
Re: Boot from MSA2012SA
Hello
Two controllers are fitted with two ports each in our SAN. In total, four ports.
Each port is assigned to a different server. Three servers in production and test server.
To further detail the topology:
* LUN 3 - Virtual Disk 1 (RAID 10) - Owner Controller A - SAS disk - Visible at start.
* LUN 12, 13 and 14 - Virtual Disk 2 (RAID 5) - Owner controller B - SATA disk - NO visible at startup
* LUN 2 - Virtual Disk 3 (RAID 6) - Owner controller B - SATA disk - Visible to startup
All of these LUNs are assigned exclusively to the test server.
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тАО01-18-2012 11:26 AM
тАО01-18-2012 11:26 AM
Re: Boot from MSA2012SA
show hosts
show port-wwn
show volumes
show volume-maps
show host-maps
Regards,
Sebastian
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тАО01-23-2012 08:11 AM
тАО01-23-2012 08:11 AM
Re: Boot from MSA2012SA
Hi all
Finally, I decided to remove all LUN and start again.
I discovered that, at system startup only see the LUN with an ID that is between 1 and 7. Therefore, the LUN 12, 13 and 14 could not be seen. If I changed the ID to one that was between 1 and 7, worked perfectly to start the machine.
I don't know why? Perhaps the original SCSI standard allowed only 8 devices (7 plus the controller)?
If someone could clarify this point so I could satisfy my curiosity.
regards
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тАО01-23-2012 09:18 AM
тАО01-23-2012 09:18 AM
Re: Boot from MSA2012SA
You're most likely using a HP SC08Ge HBA SAS HBA / 488765-B21 in your hosts. Must be a restriction of the SAS boot configuration of this specific controller then. If you're doing exclicit LUN presentation on the MSA, LUN IDs does not have to be an issue, since you can assign them per host/connection. Only the boot LUN must be present during boot time. I expect the other LUNs to show up when OS is loaded with full driver stack.
Regards,
Sebastian