Hi Juergen,
I am currently in use the spare partition for saving some application. One 
thing I noticed that when I delete a file and reboot the system, the deleted 
file will automatically restore.
Any idea why it did happen?
Here is the boot up log for reference:[    1.886867] systemd[1]: /etc/mtab is 
not a symlink or not pointing to /proc/self/mounts. This is not supported 
anymore. Please make sure to replace this file by a symlink to avoid incorrect 
or misleading mount(8) output.[    1.907927] hub 2-1:1.0: USB hub found[    
1.919175] hub 2-1:1.0: 4 ports detected[    2.274296] systemd[1]: Starting 
Forward Password Requests to Wall Directory Watch.[    2.282982] systemd[1]: 
Started Forward Password Requests to Wall Directory Watch.[    2.291164] 
systemd[1]: Expecting device dev-ttymxc1.device...         Expecting device 
dev-ttymxc1.device...[    2.319263] systemd[1]: Starting Remote File Systems.[  
OK  ] Reached target Remote File Systems.[    2.349193] systemd[1]: Reached 
target Remote File Systems.[    2.355033] systemd[1]: Starting Delayed Shutdown 
Socket.[  OK  ] Listening on Delayed Shutdown Socket.[    2.379195] systemd[1]: 
Listening on Delayed Shutdown Socket.[    2.385205] systemd[1]: Starting 
/dev/initctl Compatibility Named Pipe.[  OK  ] Listening on /dev/initctl 
Compatibility Named Pipe.[    2.409264] systemd[1]: Listening on /dev/initctl 
Compatibility Named Pipe.[    2.417201] systemd[1]: Starting udev Kernel 
Socket.[  OK  ] Listening on udev Kernel Socket.[    2.439201] systemd[1]: 
Listening on udev Kernel Socket.[    2.445399] systemd[1]: Starting udev 
Control Socket.[  OK  ] Listening on udev Control Socket.[    2.469198] 
systemd[1]: Listening on udev Control Socket.[    2.475214] systemd[1]: 
Starting Arbitrary Executable File Formats File System Automount Point.[  OK  ] 
Set up automount Arbitrary Executable File Formats F...utomount Point.[    
2.509198] systemd[1]: Set up automount Arbitrary Executable File Formats File 
System Automount Point.[    2.519067] systemd[1]: Starting Dispatch Password 
Requests to Console Directory Watch.[    2.527750] systemd[1]: Started Dispatch 
Password Requests to Console Directory Watch.[    2.536103] systemd[1]: 
Starting Swap.[  OK  ] Reached target Swap.[    2.559166] systemd[1]: Reached 
target Swap.[    2.563709] systemd[1]: Expecting device dev-mmcblk0p3.device... 
        Expecting device dev-mmcblk0p3.device...[    2.589296] systemd[1]: 
Starting Journal Socket.[  OK  ] Listening on Journal Socket.[    2.609285] 
systemd[1]: Listening on Journal Socket.[    2.614693] systemd[1]: Started File 
System Check on Root Device.[    2.621258] systemd[1]: Starting Remount Root 
and Kernel File Systems...         Starting Remount Root and Kernel File 
Systems...[    2.653159] systemd[1]: Started Set Up Additional Binary Formats.[ 
   2.666523] systemd[1]: Starting udev Coldplug all Devices...         Starting 
udev Coldplug all Devices...[    2.682904] systemd[1]: Mounted POSIX Message 
Queue File System.[    2.720167] systemd[1]: Starting Apply Kernel Variables... 
        Starting Apply Kernel Variables...[    2.763424] systemd[1]: Starting 
udev Kernel Device Manager...         Starting udev Kernel Device Manager...[   
 2.817487] systemd[1]: Started Load Kernel Modules.[    2.896414] systemd[1]: 
Mounting FUSE Control File System...         Mounting FUSE Control File 
System...[    2.953510] systemd-udevd[81]: starting version 195[    2.962275] 
systemd[1]: Mounting Configuration File System...         Mounting 
Configuration File System...[    2.997842] systemd[1]: Mounted Huge Pages File 
System.[    3.032671] systemd[1]: Starting Journal Service...         Starting 
Journal Service...[  OK  ] Started Journal Service.[    3.130359] systemd[1]: 
Started Journal Service.[  OK  ] Started udev Kernel Device Manager.[    
3.170463] systemd[1]: Started udev Kernel Device Manager.[  OK  ] Started 
Remount Root and Kernel File Systems.[    3.229306] systemd[1]: Started Remount 
Root and Kernel File Systems.[  OK  ] Started Apply Kernel Variables.[    
3.329290] systemd[1]: Started Apply Kernel Variables.[  OK  ] Mounted FUSE 
Control File System.[    3.366290] systemd[1]: Mounted FUSE Control File 
System.[  OK  ] Mounted Configuration File System.[    3.429275] systemd[1]: 
Mounted Configuration File System.[    3.435277] systemd[1]: Starting Local 
File Systems (Pre).[  OK  ] Reached target Local File Systems (Pre).[    
3.500873] systemd[1]: Reached target Local File Systems (Pre).[    3.507199] 
systemd[1]: Mounting /var/tmp...         Mounting /var/tmp...[    3.573417] 
systemd[1]: Mounting /var/lock...         Mounting /var/lock...[    3.643780] 
systemd[1]: Mounting /var/run...         Mounting /var/run...[    3.722439] 
systemd[1]: Mounting /var/log...         Mounting /var/log...[    3.766135] 
systemd[1]: Mounting /tmp...         Mounting /tmp...[    3.845927] systemd[1]: 
Mounting /sys/kernel/debug...         Mounting /sys/kernel/debug...[    
3.922233] systemd[1]: Starting Load Random Seed...         Starting Load Random 
Seed...[  OK  ] Mounted /tmp.[    4.061960] systemd[1]: Mounted /tmp.[  OK  ] 
Mounted /var/log.[    4.119282] systemd[1]: Mounted /var/log.[  OK  ] Mounted 
/var/run.[    4.139294] systemd[1]: Mounted /var/run.[  OK  ] Mounted 
/var/lock.[    4.189277] systemd[1]: Mounted /var/lock.[  OK  ] Mounted 
/var/tmp.[    4.206704] systemd[1]: Mounted /var/tmp.[  OK  ] Mounted 
/sys/kernel/debug.[    4.259295] systemd[1]: Mounted /sys/kernel/debug.[FAILED] 
Failed to start Load Random Seed.See 'systemctl status 
systemd-random-seed-load.service' for details.[  OK  ] Started udev Coldplug 
all Devices.[  OK  ] Found device /dev/ttymxc1.[  OK  ] Found device 
/dev/mmcblk0p3.         Mounting /home...[    5.589957] EXT2-fs (mmcblk0p3): 
warning: mounting unchecked fs, running e2fsck is recommended[  OK  ] Mounted 
/home.[  OK  ] Reached target Local File Systems.         Starting Trigger 
Flushing of Journal to Persistent Storage...         Starting Recreate Volatile 
Files and Directories...[    5.860084] imx-sdma 63fb0000.sdma: loaded firmware 
1.1[  OK  ] Started Trigger Flushing of Journal to Persistent Storage.[  OK  ] 
Started Recreate Volatile Files and Directories.[  OK  ] Reached target System 
Initialization.[    6.107619] systemd[1]: 
[/lib/systemd/system/pure-uploadscript.service:4] Path in condition not 
absolute, ignoring:[  OK  ] Listening on pure-ftpd.socket.[  OK  ] Listening on 
D-Bus System Message Bus Socket.[  OK  ] Listening on sshd.socket.[  OK  ] 
Reached target Sockets.[  OK  ] Reached target Basic System.         Starting 
user independend autostart...         Starting user independend autostart...    
     Starting user independend autostart...         Starting user independend 
autostart...[    6.502994] can: isotp protocol (rev 20090105 alpha)         
Starting user independend autostart...         Starting Mark kernel activated 
network interfaces as up...         Starting Login Service...         Starting 
Permit User Sessions...         Starting D-Bus System Message Bus...[  OK  ] 
Started D-Bus System Message Bus.         Starting Network Manager 
configuration (ignore kerne... interfaces)...[  OK  ] Started Permit User 
Sessions.[  OK  ] Started Mark kernel activated network interfaces as up.       
  Starting Handle network interface with ifup/ifdown...         Starting Getty 
on tty1...[  OK  ] Started Getty on tty1.         Starting Serial Getty on 
ttymxc1...[    7.468727] flexcan 53fc8000.can can0: bitrate error 0.2%[  OK  ] 
Started Serial Getty on ttymxc1.[  OK  ] Reached target Login Prompts.[    
7.577542] flexcan 53fc8000.can can0: writing ctrl=0x12092081[    8.073917] 
flexcan 53fc8000.can can0: bitrate error 0.2%[  OK  ] Started Login Service.[   
 8.157588] flexcan 53fc8000.can can0: writing ctrl=0x1209e0d1[    8.210733] 
flexcan 53fcc000.can can1: bitrate error 0.2%[    8.216830] flexcan 
53fcc000.can can1: writing ctrl=0x12092081[    8.368352] fec 63fec000.ethernet 
eth0: Freescale FEC PHY driver [Generic PHY] (mii_bus:phy_addr=fixed-0:01, 
irq=-1)[    8.420845] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready[    
8.537149] systemd-journald[90]: Received SIGUSR1[  OK  ] Started Network 
Manager configuration (ignore kernel...rk interfaces).         Starting Network 
Manager...[FAILED] Failed to start Handle network interface with 
ifup/ifdown.See 'systemctl status ifupdown.service' for details.[   10.359103] 
libphy: fixed-0:01 - Link is Up - 100/Full[   10.364314] IPv6: 
ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready[  OK  ] Started Network 
Manager.[  OK  ] Reached target Network.
Thanks,Ian
> From: j...@pengutronix.de
> To: oselas@community.pengutronix.de
> Date: Wed, 1 Oct 2014 09:01:50 +0200
> CC: psycl...@hotmail.com
> Subject: Re: [oselas] u-boot_hd.config
> 
> Hi Ian,
> 
> please keep the mailing list at least on CC. Thanks.
> 
> On Wednesday 01 October 2014 07:19:08 ian c wrote:
> > thanks for the detailed description. However, I still have question,
> > though.
> >
> > >> partition spare {
> > >> size = 256M
> > >> partition-type = 0x83
> > >> }
> > >> size=1024M
> > >> }
> >
> > What is mean for size=1024M? If I add partition (e.g. I name its partition
> > duplicate), should I reduce that size value?
> 
> If you take a closer look, the "size=1024M" is inside the "image" block. So 
> it 
> defines the size of the whole image file to be created.
> 
> Regards,
> Juergen
> 
> -- 
> Pengutronix e.K.                              | Juergen Borleis             |
> Industrial Linux Solutions                    | http://www.pengutronix.de/  |
> 
                                          

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