[linux-lvm] Why vgscan not in kernel?

[Steven Lembark]

>> upon boot, SCSI and IDE drivers check harddrives attached to the device
>> for partitions. Wouldn't it be better to have similar functionality
>> (scanning for VG's) for LVM in the kernel, instead of using a userland
>> command?

It is rather dangerous unless you have a separate kernel w/o LVM or 
a boot option (e.g., -lm) that allows booting with LVM turned off.
Otherwise you can easily end up unable to reboot with a corrupt LVM
system.