topic Converting Filesystem to raw? in Operating System - HP-UX

Converting Filesystem to raw?

Roger Baptiste — Thu, 11 Apr 2002 08:21:59 GMT

hi,

What is the procedure for converting a Filesystem-database to raw-volume database ? Assume, a filesystem /oradb/testdb/rdbm0001 is 50Gb and has the files:
/oradb/testdb/rdbm0001
/oradb/testdb/rdbm0001/lost+found
/oradb/testdb/rdbm0001/controlfiles
/oradb/testdb/rdbm0001/controlfiles/testdb_control01.ctl
/oradb/testdb/rdbm0001/datafiles
/oradb/testdb/rdbm0001/datafiles/testdb_system1_01.dbf
/oradb/testdb/rdbm0001/datafiles/cycle_data_02.dbf
/oradb/testdb/rdbm0001/datafiles/request_data_03.dbf
/oradb/testdb/rdbm0001/datafiles/q2_tab_ts1_01.dbf
/oradb/testdb/rdbm0001/redologs
/oradb/testdb/rdbm0001/rollsegs

How to convert this to a raw volume ?? Do i create raw lv for each file
and do dd of each file to the raw lv? Is their a limitation on the raw lv size?

thanks
-raj

Re: Converting Filesystem to raw?

Carlos Fernandez Riera — Thu, 11 Apr 2002 08:40:54 GMT

Yes, you must create a lvol for each datafile.

Then use dd to copy data from file to rlvol. dd if=file of=/dev/vgxxxx/rlvolxxx bs=1024k

Chown ora_user:dba and chmod 644 each rlv.

If you want to maintain actual names for datafiles, create symbolic links to rlvols.

Or in svrmgrl use backup control file to trace, edit that file, and after change filename to rlvols, follow instructions inside trace file.

Re: Converting Filesystem to raw?

harry d brown jr — Thu, 11 Apr 2002 10:52:14 GMT

Raj,

You need to export your database and rebuild it. You should not copy files to a raw logical volume. How would the database know where those table spaces exist?

live free or die
harry

Re: Converting Filesystem to raw?

Carlos Fernandez Riera — Thu, 11 Apr 2002 11:00:14 GMT

Sorry Harry, must dd can be done.

I use to configure raw devices for Oracle databases and, when you make a typo a fs-datafile is created. You can correct by dd to raw device and using rename datafile on sqlplus.