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authorDenys Vlasenko <vda.linux@googlemail.com>2012-01-11 00:02:31 (GMT)
committer Denys Vlasenko <vda.linux@googlemail.com>2012-01-11 00:02:31 (GMT)
commit7550201e9ac93e885e98feca1739921f73efcabd (patch)
treee1efb2d62b55ba0f6fce8efa8389d87ac6334e1b
parent499597d6efb0de5bb6d6f52bda1f348478d7f5a9 (diff)
downloadbusybox-7550201e9ac93e885e98feca1739921f73efcabd.tar.gz
busybox-7550201e9ac93e885e98feca1739921f73efcabd.tar.bz2
mke2fs: do not zero out first kilobyte. Closes 3247
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--util-linux/mkfs_ext2.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/util-linux/mkfs_ext2.c b/util-linux/mkfs_ext2.c
index f6ccc9c..6cbbe0e 100644
--- a/util-linux/mkfs_ext2.c
+++ b/util-linux/mkfs_ext2.c
@@ -615,7 +615,11 @@ int mkfs_ext2_main(int argc UNUSED_PARAM, char **argv)
// zero boot sectors
memset(buf, 0, blocksize);
- PUT(0, buf, 1024); // N.B. 1024 <= blocksize, so buf[0..1023] contains zeros
+ // Disabled: standard mke2fs doesn't do this, and
+ // on SPARC this destroys Sun disklabel.
+ // Users who need/want zeroing can easily do it with dd.
+ //PUT(0, buf, 1024); // N.B. 1024 <= blocksize, so buf[0..1023] contains zeros
+
// zero inode tables
for (i = 0; i < ngroups; ++i)
for (n = 0; n < inode_table_blocks; ++n)