From: Petr Uzel Date: Thu, 29 May 2014 14:50:31 +0200 Subject: libparted: allow bigger snap radius if cylinders are used References: bnc#879387 Patch-mainline: no, custom change for flexibility This is partial revert of commit commit 18e727d492933ae1ebb16961e1df553f9299af8b Author: Brian C. Lane Date: Tue Jun 21 10:44:15 2011 -0700 libparted: fix snap radius so that it is using half (#665496) The snap radius didn't match the documentation, it has been using +/- unit size instead +/- 0.5 * unit (eg. 500KB for a MB unit). This caused problems when specifying 1MB, 1GB, etc. as a partition start or end resulting in partitions being created that were nowhere near the specified size. Only revert to the old behavior if cylinders are used in order to give parted more flexibility when snapping the partition start/end. --- libparted/unit.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) Index: parted-3.1/libparted/unit.c =================================================================== --- parted-3.1.orig/libparted/unit.c +++ parted-3.1/libparted/unit.c @@ -540,7 +540,10 @@ ped_unit_parse_custom (const char* str, } unit_size = ped_unit_get_size (dev, unit); - radius = (ped_div_round_up (unit_size, dev->sector_size) / 2) - 1; + if (unit == PED_UNIT_CYLINDER) + radius = ped_div_round_up (unit_size, dev->sector_size) - 1; + else + radius = (ped_div_round_up (unit_size, dev->sector_size) / 2) - 1; if (radius < 0) radius = 0; /* If the user specifies units in a power of 2, e.g., 4MiB, as in