[gnome-multi-writer] Aim for roughtly the same number of chunks for all device sizes

[Richard Hughes <rhughes src gnome org>]

commit 2768316d15ef7fb057383bc78f71358b88a3820f
Author: Richard Hughes <richard hughsie com>
Date:   Wed Feb 4 12:31:41 2015 +0000

    Aim for roughtly the same number of chunks for all device sizes

 src/gmw-probe.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/src/gmw-probe.c b/src/gmw-probe.c
index 52bab33..2d85070 100644
--- a/src/gmw-probe.c
+++ b/src/gmw-probe.c
@@ -192,13 +192,18 @@ gmw_probe_device_data_save (GmwProbeDevice *dev,
                            GError **error)
 {
        GmwProbeBlock *item;
+       guint64 chunk_size;
        guint i;
 
+       /* aim for roughtly the same number of chunks for all device sizes */
+       chunk_size = dev->disk_size / 256;
+       g_debug ("using chunk size of %" G_GUINT64_FORMAT "MB",
+                chunk_size / ONE_MB);
        for (i = 1; i < 40; i++) {
                item = g_new0 (GmwProbeBlock, 1);
                item->valid = TRUE;
                item->offset = g_random_int_range (1, 0xff);
-               item->address = (i * ONE_MB * 32);
+               item->address = i * chunk_size;
                item->data_old = g_new0 (guint8, ONE_BLOCK);
                if (item->address >= dev->disk_size) {
                        gmw_probe_block_free (item);