Could I mix multiple instances of cluster and noncluster SAP?

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Hi experts,

I want to build a cluster system - DEV on two servers. Also, I want to install another standalone system - QAS within these two servers.

I ran this configuration before(ECC6 sapinstall/Win2008/SQL2008) without any problems. However, with new SWPM/Win2012/SQL2012, it seems to be troublesome.

1. I install a standalone system first but when I install a cluster system using SWPM. "It will show /sapmnt is in local disk" and stop. I think it should be ok because the first /sapmnt is built in physical server for standalone server and I want to create another /sapmnt for virtual cluster host.

2. I re-install the whole system and I create a cluster system first and then standalone system. The installer is finished without errors. However, when I failover to the second node with standalone system. The central service always start failed.

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sapstart.log:

SAP-R/3-Startup Program

Starting at 2013/07/30 12:30:44

Startup Profile: "\\sapgrptcd\sapmnt\TCD\SYS\profile\START_ASCS01_sapgrptcd"

Starting Programs

(7136) CreateProcess(C:\usr\sap\TCD\SYS\exe\uc\NTAMD64\sapcpe.EXE pf=C:\usr\sap\TCD\SYS\profile\TCD_ASCS01_sapgrptcd list:C:\usr\sap\TCD\SYS\exe\uc\NTAMD64/scs.lst) failed(2). ENOENT*: No such file or directory OR: The system cannot find the file specified.

(7136) CreateProcess(C:\usr\sap\TCD\SYS\exe\uc\NTAMD64\sapcpe.EXE pf=C:\usr\sap\TCD\SYS\profile\TCD_ASCS01_sapgrptcd list:C:\usr\sap\TCD\SYS\exe\uc\NTAMD64/sapcrypto.lst) failed(2). ENOENT*: No such file or directory OR: The system cannot find the file specified.

(8716) CreateProcess: S:\usr\sap\TCD\ASCS01\exe\msg_server.EXE pf=C:\usr\sap\TCD\SYS\profile\TCD_ASCS01_sapgrptcd

(9468) CreateProcess: S:\usr\sap\TCD\ASCS01\exe\enserver.EXE pf=C:\usr\sap\TCD\SYS\profile\TCD_ASCS01_sapgrptcd

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stderr2:

S:\usr\sap\TCD\ASCS01\exe\msg_server.EXE=>sapparam(2): fopenU("C:\usr\sap\TCD\SYS\profile\TCD_ASCS01_sapgrptcd","r"): No such file or directory

S:\usr\sap\TCD\ASCS01\exe\msg_server.EXE=>No Profile used.

S:\usr\sap\TCD\ASCS01\exe\msg_server.EXE=>sapparam: SAPSYSTEMNAME neither in Profile nor in Commandline

[Thr 10608] Tue Jul 30 12:30:45 2013

[Thr 10608] *** ERROR => MsSetWorkDir: chdir C:\usr\sap\\D00\work [msntserv.c 178]

[Thr 10608] *** ERROR => MsSPrvInit: MsSetWorkDir [msntserv.c 95]

[Thr 10608] *** ERROR => mainU: MsSPrvInit [msxxserv.c 1958]