I make the backup with 'ontape -s' command, but I can't restore it with the 'ontape -r' command.
The output error is 'Physical restore failed - Cannot warm restore ROOT DBspace'

/home/informix> ontape -r

Please mount tape 1 on /home/informix/config/almpru.tap and press Return to cont
inue ...

Archive Tape Information

Tape type: Archive Backup Tape
Online version: Informix Dynamic Server Version 7.31.UC5
Archive date: Wed Jan 15 03:00:12 2003
User id: root
Terminal id: ?
Archive level: 0
Tape device: /home/informix/config/almpru.tap
Tape blocksize (in k): 16
Tape size (in k): 2000000
Tape number in series: 1
Continue restore? (y/n)y

Spaces to restore:1 [rootdbs ]
Physical restore failed - Cannot warm restore ROOT DBspace


Program over.

For full restore of system , it is required that particular server should be offline.

If I take-offline the informix, when I write 'ontape -r' It seems doesn't work.
There is no message.

YES, That's right, It seems run.

Thanks a lot.

I have a new related problem:
When I write ontape -r it apears 'Physical restore failed - restore reserved pages failed'
I don't know what's wrong.
...
/home/informix> ontape -r

Please mount tape 1 on /home/informix/config/almpru.tap and press Return to cont
inue ...

Archive Tape Information

Tape type: Archive Backup Tape
Online version: Informix Dynamic Server Version 7.31.UC5
Archive date: Wed Jan 15 15:14:12 2003
User id: informix
Terminal id: /dev/pts/tb
Archive level: 0
Tape device: /home/informix/config/almpru.tap
Tape blocksize (in k): 16
Tape size (in k): 2000000
Tape number in series: 1

Spaces to restore:1 [rootdbs ]

Archive Information

Informix Dynamic Server Copyright(C) 1986-1998 Informix Software, Inc.
Initialization Time 01/15/2003 14:14:04
System Page Size 2048
Version 6
Archive CheckPoint Time 01/15/2003 15:14:13

Dbspaces
number flags fchunk nchunks flags owner name
1 1 1 1 N informix rootdbs


Chunks
chk/dbs offset size free bpages flags pathname
1 1 0 262144 191090 PO- /home/informix/config/rootdbs

Continue restore? (y/n)y
Do you want to back up the logs? (y/n)n
Physical restore failed - restore reserved pages failed


Program over.

check the TAPE Parameter (should be same in source/dest onconfig files )
check the path of dbspace files (should be same in source/dest location and must exit with approprite rights)