# Rocky 9 install : existing logical volumes are not visible **URL:** \ **Category:** Rocky Linux Help & Support\ **Created:** [September 14, 2022, 2:47pm UTC](https://forums.rockylinux.org/t/rocky-9-install-existing-logical-volumes-are-not-visible/7239 "2022-09-14T14:47:46Z")\ **Posts on this page:** 1\ **Showing post:** 23
**Author:** ![josephm](https://avatars.discourse-cdn.com/v4/letter/j/a88e57/32.png) [@josephm](https://forums.rockylinux.org/u/josephm)\ **Post date:** [January 21, 2023, 12:23am UTC](https://forums.rockylinux.org/t/rocky-9-install-existing-logical-volumes-are-not-visible/7239/23 "2023-01-21T00:23:47Z")
Hello, I’ve been a CentOS user since V4 and I loved it when Rocky started up. I’ve been on Rocky since its beginning. But I’ve now been motivated by this thread. My home server (web/file) has gone from CentOS V4 up to Rocky 8.7. Of course it is and old server so I decided to upgrade. Its now on Rocky 9.1. All of my /home content is on a LV. After installing Rocky 9.1 fresh on the new server I did the following on the old one to move the disks over: ```auto systemctl stop httpd smb umount /home vgchange -an vg_home vgexport vg_home ``` I then removed the drives and installed them on the new server and did: ```auto systemctl stop httpd pvscan ``` And NOTHING of these drives was visible. found I could use gdisk and see them but LVM couldn’t see anything. So before I reformatted them I ran across this thread and used the ```auto lvmdevices --adddev /dev/sd<1> lvmdevices --adddev /dev/sd<2> ``` After that, pvscan could see them and i was able to vgimport, vgchange and mount it. Saved recovering 7TB of data. So LVM has more rules about what it can and can’t pay attention to, at least between Rock 8.7 and 9.1 (RHEL 8.7 RHEL 9.1). Thanks to All of you for the FANTASTIC work. --- _[View the full topic](https://forums.rockylinux.org/t/rocky-9-install-existing-logical-volumes-are-not-visible/7239)._