dd후 mount시 error

Redhat EL AS 4.0 입니다. 커널은 2.6.9-5.ELsmp

disk 추가후 mout시 error 발생합니다.  그리고 새로 추가한 disk로 booting하려면

어떻게 해야할지...

# dd if=/dev/hda of=/dev/hdb bs=8192

[root@symc-mro ~]# fdisk -l

Disk /dev/hda: 80.0 GB, 80060424192 bytes
255 heads, 63 sectors/track, 9733 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/hda1   *           1         127     1020096   83  Linux
/dev/hda2             128        5909    46443915   83  Linux
/dev/hda3            5910        7821    15358140   83  Linux
/dev/hda4            7822        9733    15358140    5  Extended
/dev/hda5            7822        8713     7164958+  83  Linux
/dev/hda6            8714        9095     3068383+  83  Linux
/dev/hda7            9096        9350     2048256   82  Linux swap
/dev/hda8            9351        9605     2048256   83  Linux
/dev/hda9            9606        9732     1020096   83  Linux

Disk /dev/hdb: 82.3 GB, 82348277760 bytes
255 heads, 63 sectors/track, 10011 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/hdb1   *           1         127     1020096   83  Linux
/dev/hdb2             128        5909    46443915   83  Linux
/dev/hdb3            5910        7821    15358140   83  Linux
/dev/hdb4            7822        9733    15358140    5  Extended
/dev/hdb5            7822        8713     7164958+  83  Linux
/dev/hdb6            8714        9095     3068383+  83  Linux
/dev/hdb7            9096        9350     2048256   82  Linux swap
/dev/hdb8            9351        9605     2048256   83  Linux
/dev/hdb9            9606        9732     1020096   83  Linux

#  mount -t ext3 /dev/hdb5 /test

mount: special device /dev/hdb5 does not exist

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/etc/fstab

# This file is edited by fstab-sync - see 'man fstab-sync' for details
LABEL=/                 /                       ext3    defaults        1 1
LABEL=/boot1            /boot                   ext3    defaults        1 2
none                    /dev/pts                devpts  gid=5,mode=620  0 0
none                    /dev/shm                tmpfs   defaults        0 0
LABEL=/home             /home                   ext3    defaults        1 2
LABEL=/orabak           /orabak                 ext3    defaults        1 2
LABEL=/oracle1          /oracle                 ext3    defaults        1 2
none                    /proc                   proc    defaults        0 0
none                    /sys                    sysfs   defaults        0 0
LABEL=/usr              /usr                    ext3    defaults        1 2
LABEL=/var              /var                    ext3    defaults        1 2
LABEL=SWAP-hda7         swap                    swap    defaults        0 0
/dev/hdc                /media/cdrom            auto    pamconsole,exec,noauto,managed 0 0
/dev/fd0                /media/floppy           auto    pamconsole,exec,noauto,managed 0 0
~