R12 Multi node installation

Dear Gurus,
I am doing multimode installation of R12 as follows:
Box 1 - AppsTier
Create user applmgr
All pre-requisites of linux os
Create stage
Total space available 100Gb for AppsTier
One mount point
/apps permission: 777 owner: applmgr group: dba
Set domain in /etc/hosts file (ip address hostname.domainname.com hostname) ex: 192.168.1.10 apps.rana.com apps
Box 2 - BdTier
Create user oracle
All pre-requisities of linux
Total space available 300Gb for AppsTier
Two mount point
/oracle - 25Gb permission 777 owner: oracle group: dba
/data - 275Gb permission 777 owner: oracle group: dba
Set domain in /etc/hosts file (ip address hostname.domainname.com hostname) ex: 192.168.1.11 db.rana.com db
Now following are my questions:
When I start rapidwiz on Box 1 (Apps) as root and reach on a screen where it ask for Database Node Configuration information I am giving the following:
Database Type: PROD
Database SID : PROD
Hostname: db
Domain name: rana.com
Operating System: Linux X86
Database OS user: oracle
Database OS Group: dba
Base directory : /oracle
But when I click on next it tell me Unable to write to following directory. Please check for the permissions. Please advice what I am doing is correct ? Also when I click on Brows button of Base Directory it show me the directory structure of Box 1 which is for Apps but I need to see the directory structure of Box 2 Db.
Please share your valuable suggestion
Thanks in advance
Kiran

Kirin,
Srini is correct. You should start with the database node configuration first. Run rapidwiz on the database node first, then run rapidwiz on the second node (apps tier). Reference section 2-1 of [Oracle Applications Installation Guide: Using Rapid Install|http://download.oracle.com/docs/cd/B40089_10/current/acrobat/120oaig.pdf|R12 Install Guide]:
You need to carry out the relevant steps on each node that
will be part of your Applications system, for example a database node
and two Applications nodes. Where applicable, operations should be
carried out on the database node first. (I think I'm okay quoting that here, since this is an OTN-hosted document, not a Metalink document).
Regards,
John P.
[http://only4left.jpiwowar.com|http://only4left.jpiwowar.com|Shameless plug for my low-volume blog]

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###########################

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set lines 132
set trims on
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please see this
https://forums.oracle.com/forums/search.jspa?threadID=&q=Connected+users&objID=c3&dateRange=all&userID=&numResults=15&rankBy=10001
;) AppsMAsti ;)
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