From 805e6dbc15eae5a4f85eea3c37e295aefaefeb69 Mon Sep 17 00:00:00 2001 From: "Richard W.M. Jones" Date: Sat, 30 Apr 2011 20:11:21 -0400 Subject: [PATCH] guestfs(3): Note that host file size limits affect guest disk limits. --- src/guestfs.pod | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/src/guestfs.pod b/src/guestfs.pod index 7cfd2b2..5d9d804 100644 --- a/src/guestfs.pod +++ b/src/guestfs.pod @@ -2819,6 +2819,15 @@ We have tested block devices up to 1 exabyte (2**60 or 1,152,921,504,606,846,976 bytes) using sparse files backed by an XFS host filesystem. +Although libguestfs probably does not impose any limit, the underlying +host storage will. If you store disk images on a host ext4 +filesystem, then the maximum size will be limited by the maximum ext4 +file size (currently 16 TB). If you store disk images as host logical +volumes then you are limited by the maximum size of an LV. + +For the hugest disk image files, we recommend using XFS on the host +for storage. + =head2 MAXIMUM SIZE OF A PARTITION The MBR (ie. classic MS-DOS) partitioning scheme uses 32 bit sector -- 1.8.3.1