IBM HPSS 6.3.24.2. Revert the HPSS 6.2 Syste m to Version 5.1

in tape mount errors for read operations
Once it is determined that it’s safe to revert back to Release 6.2, perform the st eps as follows. Note
that this procedure assumes that the upgrade stopped after the 6.2 servers are up but before changes
were made that may affect the 4.5 user data or invalidate the 4.5 metadata.
Perform the following steps for each root and non-root subsystem:
1. Shutdown all HPSS servers, if running.
2. Shutdown DB2. This step is optional since it does not affect the 4.5 system.
3. Undo DCE changes. This step is optional since it does not affect the 4.5 system.
% db_convert_dce_cds_undo -sub <subsys id> \
-g /.:/encina/sfs/hpss/globalconfig
4. Restore the rc.hpss script in /etc. Perform this step on each HPSS machine (e.g. remote
movers).
% cd /etc
% mv rc.hpss_45 rc.hpss
5. Restore the FTP config, assuming that the PFTP Daemon is to run on the root subsystem.
Restore the /etc/inetd.conf file
% cd /etc
% mv inetd.conf_45 inetd.conf
Refresh the inetd Daemon
% refresh -s inetd, or
% kill -1 <inetd pid>
6. Restore the HPSS 4.5 /var/hpss directory and its contents
% cd /var
% rm -Rf hpss
% mv hpss_45 hpss
7. Restore the HPSS server keytab files
% cd /krb5
% mv hpss.keytabs_45 hpss.keytabs
8. Restore the installed HPSS 4.5 code. Note that lpp version for the HPSS installat ion is 6.2
and not 4.5
% cd /opt
% mv hpss hpss_62
% mv hpss_45 hpss
9. Start HPSS 4.5 servers
6.3.24.2. Revert the HPSS 6.2 Syste m to Version 5.1
Reverting to HPSS 5.1 from HPSS 6.2 is accomplished by renaming the tables in each DB2 database
(e.g. CFG and SUBSYS1) that begin with "PRE62_" to their original name; the same name without
HPSS Installation Guide July 2008
Release 6.2 (Revision 2.0) 226