Hi
You install a second NIU2 in your system (preferably in LIM1 where your first dump is located).
Then initiate the following commands
[tt]
/*****************************************************************/
/* */
/* Initiation of Extra Backup Disk (ATA Disk or CompactFlash) */
/* */
/* !! NOTE : OLd Safety backup system is no longer valid !! */
/* !! (SAFETY-HDU, SAFETY-FS, FISBI) !! */
/* */
/* Extra backup is made by copying ordinary backup REL1/REL2 */
/* to the extra HDU/CF. */
/* */
/* */
/*****************************************************************/
IOBPI:NODE=BACKUP,BPOS=1-0-50;
IOSII:NODE=BACKUP,IODEV=BACKUP,SUBFS=SYSSUBFS31&SYSSUBFS41,BTYPE=ATA;
/* Create a new iodev on the sysn for slave ATA "safety" disk */
FICRI:SUBFS=SYSSUBFS31,SIZE=60;
Y;
FICRI:SUBFS=SYSSUBFS41,SIZE=60;
Y;
/* Mount the subfiles */
FIMOI:SUBFS=SYSSUBFS31,PATH=/BACKUP/USR3;
FIMOI:SUBFS=SYSSUBFS41,PATH=/BACKUP/USR4;
/* Create USR3/SES/DR */
FIDII

ATH=/BACKUP/USR3/SES/;
FIDII

ATH=/BACKUP/USR3/SES/DR;
/* Create USR4/SES/DR */
FIDII

ATH=/BACKUP/USR4/SES/;
FIDII

ATH=/BACKUP/USR4/SES/DR;
/* Make sure REL1 is the latest valid backup */
DUBDP;
@W
/* Copy REL1 to USR3 */
FICPI:SPATH=/SYSN/USR1/SES/DR,PATH=/BACKUP/USR3/SES/DR,COOP=DIR;
@W
/* Copy REL2 to USR4 */
FICPI:SPATH=/SYSN/USR2/SES/DR,PATH=/BACKUP/USR4/SES/DR,COOP=DIR;
/* Check USR3 & USR4 */
FIDAP

ATH=/BACKUP/USR3/SES/DR/*.*;
FIDAP

ATH=/BACKUP/USR4/SES/DR/*.*;
[/tt]
Good luck