Reuse disk from other HP-UX

zetadhell · #1 (**permalink**) 09-09-2007

Hello, I have 2 hp-ux both running 11.23, I have move one of a harddisk from "UNIX A" to "UNIX B", so how can I read back the data in "UNIX B"?

Thanks

porter · #2 (**permalink**) 09-09-2007

I hope they were isolated volumes and you did not have a virtual file system spanning onto the 2nd disk you have just removed.

What file system format do you have on the disk?

zetadhell · #3 (**permalink**) 09-09-2007

Thanks for reply, the file system is VxFS, It only have one VG with 3 mount point on this disk and this VG is only on this disk

porter · #4 (**permalink**) 09-09-2007

Does the new disk device appear in the dmesg output?

Have you tried using "SAM" to get the OS to recognize the volume group?

zetadhell · #5 (**permalink**) 09-09-2007

I can see the disk in ioscan -fnC disk.
In SAM, it only display this disk with unused status.
How to use SAM to get the OS to recognize the volume group?
Thanks

porter · #6 (**permalink**) 09-10-2007

Do you know the name of the original volume group?

Did you do a vgexport on the original system?

Quote:

To move the database: a.Shut down the database. Making a backup copy is highly recommended. b.For a file system-based database, unmount the file systems using the umount command. c.Deactivate the volume groups using the vgchange command. d.Create a map file which will facilitate moving the volume groups to the HP Integrity server by using the vgexport command. Use the –p (preview) option to avoid expunging the volume group from the HP 9000 server (to allow for backtracking if necessary). HP also recommends using the –s (shared) option; it was designed to simplify the process of moving volume groups between the nodes of a clustered system, but is also available for non-clustered systems. The following is an example of using vgexport to create a map file named mapfilefor the volume group vgORA: vgexport –p –m mapfile –s /dev/vgORA e.Copy the map file to the HP Integrity (where it will be used by a vgimport command to recreate the volume group). f.Provide the HP Integrity access to the disks containing the database. This could require physically re-cabling the disks from the HP 9000 to the HP Integrity. You can also accomplish this by reconfiguring your SAN, or in the case of a disk array, reconfiguring the LUNs to be visible to the HP Integrity. On the HP Integrity, perform an ioscan and then an insf to initiate configuration of the newly added disks or LUNs. g.Import the volume groups using the map files, and the volume group directories and group files you created earlier. For example, use: vgimport –m mapfile –s /dev/vgORA h.Change the volume group special files to be owned by the same owner and group as on the HP 9000 server, and ensure correct permissions: chown –R oracle:dba /dev/vgracchmod 644 /dev/vgrac/* i.Activate the volume groups using vgchange –a y. For a clustered system, you will need to take the extra steps to change the volumegroups to permit sharing (using vgchange –c y –S y) and then activate the volumegroup in shared mode (using vgchange –a s). j.If your database is implemented using file systems, mount the logical volumes contained in the volume groups you just activated (for example, mount /dev/vgORA/lv01 /ora01).

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