[linux-lvm] LVM skips /dev/hde3 because sysfs tells it not to use it

Milan Broz mbroz at redhat.com
Thu Feb 5 21:24:30 UTC 2009

Stefan Monnier wrote:
> I had to disable sysfs_scan before pvcreate accepted to use /dev/hde3 on
> a little MIPS box.
> How does LVM decide whether sysfs tells it to use a block device or not?
> And why would /dev/hde (an internal IDE drive) be presented by sysfs as
> "not to be used by LVM"?

It should be possible to use the device unless there is some filter set.

Run the command with debug on (add -vvvv) and you will see which filter disabled
the device and why.

I guess you can also hit this "known" problem with 
old lvm toolset (<2.02.29) and new kernel with new sysfs layout.

*If* it is this situation you can fix it using one of the following
	1) disable sysfs scan
	2) upgrade lvm 
	3) switch CONFIG_SYSFS_DEPRECATED_V2 kernel config on and recompile kernel

mbroz at redhat.com

More information about the linux-lvm mailing list