Has procedure to add disks changed on FC5?

[Neal Becker]

I installed a new ide disk.  I used system-config-lvm to create a new lvm. 
Then mounted it, did cp -ax / /mnt/7200rpm.  I can mount the drive fine,
but I can't seem to switch root.

I edited /etc/fstab on the new drive to say:
/dev/7200rpm/LogVol02 /                       ext3    defaults        1 1

I added this to grub:
title Fedora Core (2.6.15-1.1948_FC5)
        root (hd0,2)
        kernel /vmlinuz-2.6.15-1.1948_FC5 ro root=/dev/VolGroup00/LogVol00
rhgb quiet
        initrd /initrd-2.6.15-1.1948_FC5.img <<new entry
title Fedora Core (2.6.15-1.1948_FC5)#2
        root (hd0,2)
        kernel /vmlinuz-2.6.15-1.1948_FC5 ro root=/dev/7200rpm/LogVol02 rhgb
quiet
        initrd /initrd-2.6.15-1.1948_FC5.img

Just for test I did NOT change /boot, it still is the /dev/hda3 (hd0,2)

I even reran grub-install --rescan /dev/hda

When I try to boot entry#2, I see:

Creating root device
Mounting root filesystem
mount: could not find filesystem /dev/root
panic

I also notice that when booting the old root (entry#1), when doing lvm scan
it detects both VolGroup00 and 7200rpm, but only says 2 groups now active
on VolGroup00, nothing about 7200rpm.

lvm> pvscan -v
    Wiping cache of LVM-capable devices
    Wiping internal VG cache
    Walking through all physical volumes
  PV /dev/hdb4   VG 7200rpm      lvm2 [55.50 GB / 0    free]
  PV /dev/hda5   VG VolGroup00   lvm2 [55.56 GB / 32.00 MB free]
  PV /dev/hdb3                   lvm2 [196.11 MB]
  Total: 3 [111.26 GB] / in use: 2 [111.07 GB] / in no VG: 1 [196.11 MB]
lvm> lvscan -v
    Finding all logical volumes
  ACTIVE            '/dev/7200rpm/LogVol03' [2.00 GB] inherit
  ACTIVE            '/dev/7200rpm/LogVol02' [53.50 GB] inherit
  ACTIVE            '/dev/VolGroup00/LogVol00' [53.59 GB] inherit
  ACTIVE            '/dev/VolGroup00/LogVol01' [1.94 GB] inherit
lvm> vgscan -v
    Wiping cache of LVM-capable devices
    Wiping internal VG cache
  Reading all physical volumes.  This may take a while...
    Finding all volume groups
    Finding volume group "7200rpm"
  Found volume group "7200rpm" using metadata type lvm2
    Finding volume group "VolGroup00"
  Found volume group "VolGroup00" using metadata type lvm2