[linux-lvm] partition table needed for lvm ?
chris.hunter at yale.edu
Thu Mar 1 22:14:25 UTC 2007
Hi, I am relatively new to lvm.
I am using redhat enterprise 4, which uses "lvm2" as it default volume
manager. We have storage devices (ie SAN) that combine 20-40 disks
together into 4+ TB filesystems. We are investigating using lvm to
manage these disks.
The release notes for "rhel4 update 1" state that you _require_ a
partition table to use lvm2:
>· Various issues with LVM2 on large devices are fixed in Red Hat
>Enterprise Linux 4 Update 1. Do not use LVM2 on devices larger than 2
>TB prior to installing Update 1.
>As noted above, Red Hat requires that a partition table be written to
>the block device, even when it is used as part of an LVM2 Volume
Group. >In this case, you may create a single partition that spans the
entire >device. Then, be sure to specify the full partition name (for
example, >/dev/sda1, not /dev/sda), when you use the pvcreate and
According to the lvm HOWTO, lvm can manage disks _without_ partition
tables. In fact I tested this and it appears to work.
Do I reallly need to make partition tables on all my disks to use lvm2 ?
What will happen if I don't use partition tables with lvm ?
Thank-you in advance,
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