vaheeD khoshnouD

mbrback shell script creates a backup of your hard drive’s MBR and its partition table. You can then use mbrback to restore the MBR boot code, full MBR, or partition table from the backup files.

1. #!/bin/bash
2. # Script Name: mbrback http://igurublog.wordpress.com/downloads/script-mbrback/
3. # Requires: util-linux
4. # License: GNU GENERAL PUBLIC LICENSE Version 3 http://www.gnu.org/licenses/gpl-3.0.txt
6. # do not change these variables!
7. argsneeded=1
8. restoretype=””
9. back=””
10. devname=””
12. help ()
13. {
14. echo ‘mbrback version 1.0.0’
15. echo ‘Creates MBR and partition table backups of DEVICE named:’
16. echo ‘ HOST-DEVICE-MBR-back’
17. echo ‘ HOST-DEVICE-partition-back.sf’
18. echo ‘Restores MBR and partition table from specified backup file’
19. echo ‘Usage: sudo mbrback DEVICE [BACKUPFOLDER]’
20. echo ‘ (creates backup files of DEVICE)’
21. echo ‘Usage: sudo mbrback –restoreboot DEVICE [BACKUPFILE]’
22. echo ‘ (restores MBR boot code only)’
23. echo ‘Usage: sudo mbrback –restorefullmbr DEVICE [BACKUPFILE]’
24. echo ‘ (restores entire MBR)’
25. echo ‘Usage: sudo mbrback –restorepart DEVICE [BACKUPFILE.sf]’
26. echo ‘ (restores partition table)’
27. echo ‘Example: sudo mbrback sda’
28. echo ‘ (creates MBR and partition table backups of’
29. echo ‘ /dev/sda in current folder)’
30. echo ‘Example: sudo mbrback /dev/sda’
31. echo ‘ (creates MBR and partition table backups of’
32. echo ‘ /dev/sda in current folder)’
33. echo ‘Example: sudo mbrback sda /mybackups’
34. echo ‘ (creates MBR and partition table backups of’
35. echo ‘ /dev/sda in /mybackups)’
36. echo ‘Example: sudo mbrback –restoreboot sda /mybackups/sys-sda-MBR-back’
37. echo ‘ (restores MBR boot code of /dev/sda using’
38. echo ‘ /mybackups/sys-sda-MBR-back)’
39. echo ‘Example: sudo mbrback –restorepart sda /mybackups/sys-sda-partition-back.sf’
40. echo ‘ (restores partition table of /dev/sda using sfdisk file ‘
41. echo ‘ /mybackups/sys-sda-partition-back.sf)’
42. echo
43. echo “When restoring, mbrback will always tell you what it’s going to do”
44. echo “and allow you to abort before it writes to disk.”
45. echo
46. echo “Instructions and updates:”
47. echo “http://igurublog.wordpress.com/downloads/script-mbrback/”
48. echo
49. }
51. index=0
52. while [ “$1” != “” ];
53. do
54. if [ “${1:0:1}” = “-” ]; then
55. case “$1” in
56. –help | -help )
57. help
58. exit
59. ;;
60. –restoreboot )
61. if [ “$restoretype” = “” ]; then
62. restoretype=”boot”
63. else
64. echo ‘mbrback: can only use one restore option’
65. exit 1
66. fi
67. ;;
68. –restorefullmbr )
69. if [ “$restoretype” = “” ]; then
70. restoretype=”fullmbr”
71. else
72. echo ‘mbrback: can only use one restore option’
73. exit 1
74. fi
75. ;;
76. –restorepart )
77. if [ “$restoretype” = “” ]; then
78. restoretype=”part”
79. else
80. echo ‘mbrback: can only use one restore option’
81. echo
82. help
83. exit 1
84. fi
85. ;;
86. * )
87. echo “mbrback: Unknown option $1”
88. echo
89. help
90. exit 1
91. ;;
92. esac
93. else
94. let “index+=1”
95. case $index in
96. 1 )
97. devname=`basename “$1″`
98. if [ ! -b “/dev/$devname” ]; then
99. echo “mbrback: /dev/$devname is not a valid device”
100. exit 1
101. fi
102. ;;
103. 2 )
104. back=”$1″
105. ;;
106. * )
107. echo “mbrback: Too many arguments”
108. exit 1
109. ;;
110. esac
111. fi
112. shift
113. done
114. if (( index < $argsneeded )) || [ “$devname” = “” ]; then
115. echo “mbrback: missing arguments”
116. echo
117. help
118. exit 1
119. fi
121. if [ `whoami` != “root” ]; then
122. echo ‘mbrback: must be run with sudo’
123. exit 1
124. fi
126. sysname=$HOSTNAME
128. if [ “$restoretype” = “” ]; then
129. # create MBR and table backups
130. if [ “$back” = “” ]; then
131. back=`pwd`
132. else
133. if [ ! -d “$back” ]; then
134. echo “mbrback: $back is not a valid backup folder”
135. exit 1
136. fi
137. fi
138. dd if=/dev/$devname of=”$back/$sysname-$devname-MBR-back” bs=512 count=1
139. sfdisk -d /dev/$devname > “$back/$sysname-$devname-partition-back.sf”
140. else
141. # restore
142. if [ “$back” = “” ]; then
143. echo “mbrback: you must specify a backup file”
144. exit 1
145. elif [ ! -f “$back” ]; then
146. echo “mbrback: file not found – $back”
147. exit 1
148. fi
149. if [ “$restoretype” = “boot” ] || [ “$restoretype” = “fullmbr” ]; then
150. sfhead=`head –bytes=21 “$back”`
151. if [ “$sfhead” = “# partition table of ” ]; then
152. echo “mbrback: $back is not an MBR backup file”
153. exit 1
154. fi
155. if [ “$(stat -c%s “$back”)” != “512” ]; then
156. echo “mbrback: $back is wrong size for an MBR backup file”
157. exit 1
158. fi
159. fi
160. if [ “$restoretype” = “part” ]; then
161. sfhead=`head –bytes=21 “$back”`
162. if [ “$sfhead” != “# partition table of ” ]; then
163. echo “mbrback: $back not a valid sfdisk backup file”
164. exit 1
165. fi
166. echo
167. echo “You are about to overwrite your /dev/$devname partition table with”
168. echo “the contents of $back”
169. echo
170. echo “WARNING!!! Unless the partition table has been damaged or you”
171. echo ” have accidentally deleted a partition, you should abort.”
172. echo
173. echo “WARNING!!! Restoring the partition table from an out-of-date backup”
174. echo ” may render ALL the data on your drive unreadable.”
175. echo
176. echo “WARNING!!! Do not proceed if /dev/$devname is mounted.”
177. echo
178. elif [ “$restoretype” = “boot” ]; then
179. echo
180. echo “You are about to overwrite your /dev/$devname MBR boot code with”
181. echo “the contents of $back”
182. echo
183. echo “WARNING: Restoring your MBR boot code from an out-of-date MBR backup”
184. echo ” file may render your computer unbootable.”
185. elif [ “$restoretype” = “fullmbr” ]; then
186. echo
187. echo “You are about to overwrite your ENTIRE /dev/$devname MBR with”
188. echo “the contents of $back”
189. echo
190. echo “WARNING!!! The full MBR contains both boot code and the drive’s”
191. echo ” partition table. Unless the partition table has been”
192. echo ” damaged or you have accidentally deleted a partition”
193. echo ” you should abort and restore boot code only with”
194. echo ” –restoreboot instead.”
195. echo
196. echo “WARNING!!! Restoring your full MBR from an out-of-date MBR backup may”
197. echo ” render your computer unbootable and ALL the data on your”
198. echo ” drive unreadable.”
199. echo
200. echo “WARNING!!! Do not proceed if /dev/$devname is mounted.”
201. fi
202. echo
203. echo “Do you want to proceed? (you must type yes to proceed)”
204. read s1
205. if [ “$s1” != “yes” ]; then
206. echo “mbrback: no changes made – aborted at user request”
207. exit 2
208. fi
209. if [ “$restoretype” = “part” ]; then
210. sfdisk /dev/$devname < “$back”
211. elif [ “$restoretype” = “boot” ]; then
212. dd if=”$back” of=/dev/$devname bs=448 count=1
213. elif [ “$restoretype” = “fullmbr” ]; then
214. dd if=”$back” of=/dev/$devname bs=512 count=1
215. fi
216. echo “/dev/$devname was updated”
217. fi
219. exit 0