Red Hat Bugzilla – Bug 479209
Cannot create persistence larger than 2GB for ext3 formatted target device
Last modified: 2009-09-01 08:44:40 EDT
Description of problem:
the GUI will not allow you to specify a persistence overlay larger than 2GB (fat32 limit), even when it finds a large enough ext3-formatted target device. Using the livecd-iso-to-disk CLI, huge persistence layers are possible over ext3, and so it should be in the linux-version GUI (obviously no ext3 driver for windows by default though).
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. plug in an ext3-formatted usbkey which is 4GB or larger
2. run liveusb-creator and note that the "Persistent Storage" horizontal slider max limit is still 2047MB.
artificial limit for ext3
1) a 0-2047MB limit for fat32 target devices
2) a 0-maxdevicesize limit for ext3 target devices
From: Xose Vazquez Perez <firstname.lastname@example.org>
new info from a private e-mail from
OGAWA Hirofumi <email@example.com> VFAT/FAT/MSDOS FILESYSTEM
maintainer, he says:
"This was fixed long time ago. However, > 2G can handle only on FAT32
because of fs limitation."
So, there is no reason to put a 2G limit on the overlay file.
This issue should be resolved in version 3.6 of the liveusb-creator. Please re-open this ticket if you still encounter this problem with the latest version. Thanks!
In version 3.6, it can create an overlay file larger than 2GB on ext, but if you boot with the liveusb system, and type df -h, the space is not really there. Also, I tried dd if=/dev/zero of=a_file, and it ran out of space well before the amount selected on the GUI. It seems like the limit is the minimum of the size of the iso file or the overlay file. Since this is ~700 MB, you still can't use all of even a 2GB overlay file. I think this bug needs to be reopened.