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HP-UX System Administrator's Guide: Logical Volume Management: HP-UX 11i Version 3 > Chapter 4 Troubleshooting LVM

Root Volume Group Scanning

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If the LVM subsystem detects that vital information is corrupted on the boot disk, it scans all the attached devices to try to find the physical volumes that are part of the root volume group. You then see the following messages on the system console and in /var/adm/syslog/syslog.log:

LVM : Failure in attaching PV (dev=0x10000nn) to the root volume group. The physical volume does not belong to the root volume group LVM : Failure in attaching PV (dev=0x10000nn) to the root volume group. The physical volume does not belong to the root volume group LVM : Activation of root volume group failed Quorum not present, or some physical volume(s) are missing LVM: Scanning for Root VG PVs (VGID 0xnnnnnnnn 0xnnnnnnnn)

If this root volume group scanning succeeds, messages similar to the following appear:

LVM: Rootvgscan detected 10 PV(s). Will attempt root VG activation using the following PV(s): 0x100005f 0x1000060 0x1000061 0x1000062 0x1000063 0x1000064 0x1000065 0x1000067 0x1000068 0x100006e LVM: WARNING: Root VG activation required a scan. The PV information in the on-disk BDRA may be out-of-date from the system's current IO configuration. To update the on-disk BDRA, first update /etc/lvmtab using vgscan(1M), then update the on-disk BDRA using lvlnboot(1M). For example, if the root VG name is /dev/vg00: 1. vgscan -k -f /dev/vg00 2. lvlnboot -R /dev/vg00 LVM: Root VG activated

If this root volume group scan fails to find all physical volumes, the following message appears:

LVM: WARNING: Rootvgscan did not find any PV(s) matching root VGID. Will attempt root VG activation using the boot device (0x10000nn).

Or the following message:

LVM: WARNING: BDRA lists the number of PV(s) for the root VG as nn, but rootvgscan found only nn. Proceeding with root VG activation.
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