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November 24th, 2014 19:00
cannot see bootlun0 in add datastores
I got a esxi host that is boot from san with lun0. I unmasked this lun from the esxi host.
Then I added this lun to another ESXi host storage group. but i cannot add this bootlun. I dont see it. but I see it under devices on the hba.
any idea?
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dynamox
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November 24th, 2014 22:00
i don't understand how can you see this LUN as a datastore if you are trying to actually boot off that LUN ? You did not answer my question about server make/HBA. Steps are different for HP/UCS
tdubb123
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November 24th, 2014 22:00
sorry I am not trying to boot from this lun.
I am trying to clone that bootlun or move that esxi installation to a new lun.
So I removed that bootlun from that sg. and assigned it to another sg.
The other sg already has a bootlun assigned and its booting off it.
The ucs blade has vic 1280 adapter.
does that make sense?
dynamox
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November 24th, 2014 22:00
what server type, what HBA ? Help us help you
tdubb123
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November 24th, 2014 22:00
im sorry actually I see the lun under datastores. It guess it was already mounted.
but I see only the vmfs partition and not the esxi part.
ITs a 10gb lun but I only see the 5GB vmfs piece
any idea?
I am trying to clone the bootlun
tdubb123
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November 25th, 2014 06:00
hi I am really trying to clone a bootlun without doing it from the san side. do you know if it possible to add the bootlun as an rdm in a vm?
dynamox
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November 25th, 2014 08:00
why are you trying to boot VM from an RDM disk ? Is the purpose of this exercise to virtualize a physical server, if yes why not P2V ?
tdubb123
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November 25th, 2014 08:00
hi
actually I am trying to migrate bootlun from one storage to another. I am trying to do this only from the vmware side.
it is possible?
I was trying to move the boot lun from one of my esxi servers and mount it on a linux vm. Then do a clone that way.
any ideas?
tdubb123
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November 25th, 2014 09:00
I did aa lun migrate of this lun to another lun. Then took the old lun out of this SG and then added this new lun to the SG.
but now the server will not boot from this lun
any idea?
lunid is 0
dynamox
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November 25th, 2014 10:00
are you trying to clone your ESX server boot LUN ? Why ?
dynamox
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November 25th, 2014 10:00
during LUN migration Clariion/VNX copies data from source LUN to target LUN. At the end of migration source LUN get deleted, target LUN assumes source LUN identity (LUN #). It's an online procedure, you should not need to do any from host perpective, host does not know anything is happening (maybe slightly more latency)
tdubb123
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November 25th, 2014 10:00
I am trying to migrate the bootlun to a different lun.
I tried the lun migrate method. It finished migrating. Then I unmasked the old lun to the new lun and masked the new lun to the SG. But it will not boot
any idea?
kelleg
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November 25th, 2014 14:00
A Boot-From-SAN LUN on the storage array must always be set to HLU 0 (zero) in the Storage Group that it resides in. If the Storage group you move the boot-LUN to already has a LUN that is HLU 0, then the boot-LUN added to the new Storage Group will not be HLU 0.
This is the reason that when you use Boot-From-SAN, that each host must be in a separate Storage Group as the boot-LUN must always be set to HLU 0 (zero). You can only have one LUN is a Storage group that is HLU 0.
glen