Answer / raja

Pre requisites of db refresh:
1.Take valid backup of target system either full offline or
online
2.Set the system message using SM02
3.Verify file system sizes usig command " df -k ".
4.Save sap license using " saplicense -show "
or "slicense" tcode
5.Stop all sheduled jobs using command "crontab -e" or
tcode sm37 .
6.Save the database calender using DB13
7.Save OP modes using RZ04
8.Save logon groups using SMLG.
9.Save RFC groups using RZ12
10.Save logical systems using BD54 or sale (tables TBDLS
adn TBDLST)
11.Make a note or take screen shots of TMS settings(Save
the System overview screen,Save the Transport Routes
screen,Save the Import overview screen)
12 Save the client settings using SCC$ or T000.
13.Save RFC destinations using SM59 (RFC destination table
RFCDES)
14.Export output devices using SPAD (goto --> utilities-for
o/p devices -export devices)
15.Make a note of SMTP configuration
16.Save last transport request using E070L table
17.Save distributing model using BD64(select the model--
>choose edit-->model view--> transport )
18.Export usermaster and profile (sap_user).
19.Save the TBTCS talble( background tables ).

Answer / rishi_dahiya

Hi,
here are some prerequisites for HOMOGENEOUS SYSTEM Refresh

1. match OS, SAP, Database versions, and Verify filesystem
space with source & target system, check TSM session
availability, source tape backup must finish before starting
refresh
2. export user master record
3. Create RFC export dump
4. Move source database backup file & log file to target system
5. Verity the init<SID>.utl file
6. Modify sidchange.sql file in Target system
etc.
for RFC: in target system no need to create manually all
RFCs. just follow below steps.

for export RFCs (before refresh start)
Execute command from <SID>adm R3trans -w exp_rfc.log rfcexport

usually we are using it in $home/<sid>adm/rfcbackup location.

for import RFCs after refresh completed

Import RFC’s from Unix level by user <SID>adm
Execute command as mentioned below:
location: $home/<sid>adm/rfcbackup
R3trans -w imp_rfc.log rfc_import

Best of luck..

Rishi

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