In bug 608449 in test_over4GBMailboxes.js, a couple of changes to the free space checks were made. <https://mxr.mozilla.org/comm-central/source/mailnews/local/test/unit/test_over4GBMailboxes.js#86> These changes seem to be a little problematic: 1. 0x1100000000 == 73,014,444,032. Seems like there's either an extra 1 or an extra 0 there. 2. If we mark most of a file as sparse I can't imagine we'll actually need 4 gigs of hard drive space.

I take the liberty to take this bug as it seems David is not working on this. And I rework this test in bug 640371. Point 1 is no longer valid today, the constant is currently at 0x110000000 which is 4,25GB, which is correct. For point 2, maybe the check is there for cases where sparse will not work for some reason (e.g. filesystem not supporting it). Also in bug 640371 the test is changed so that the sparse marking is lost and the files really take 4GB. I keep this bug open until that bug is decided if the test can be changed in that way.

I meant the bug losing sparse markings is bug 794303.

I think this is done now. The test will again be reworked soon to test 4GB+ folders.