mainstoreBackup - Support: sr #107616, System Freezes during backup


sr #107616: System Freezes during backup

Submitter:  None
Submitted:  Sun 06 Mar 2011 06:21:09 AM UTC
Category:  None Priority:  5 - Normal
Severity:  5 - Blocker Status:  Done
Privacy:  Public Assigned to:  None
Originator Email:  -email is unavailable- Open/Closed:  Open
Operating System:  GNU/Linux
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Mon 07 Mar 2011 09:21:55 AM UTC, comment #2: 

Looks like you are right.  I paid extra to get good memory when I bought this computer, but memtest86+ tells me there is a problem right at the highest end of the memory - which I assume doesn't usually get used.

So I will be out to buy some more memory shortly.

Sun 06 Mar 2011 07:17:49 AM UTC, comment #1: 


the only ways to screw up a Unix (Linux) system I know about are:
- using infinite amount of memory (or much too much)
- starting an infinite number of processes (or thousands)

You should double check if storeBackup is doing one or the other, but I've never heard about it. You can double check what's going on eg. by using the commands dstat (cpu load, i/o, swap, dstat should be part of your distribution, you may have to install it) and top (# processes, cpu load).

storeBackup is just a script with no special kernel drivers or so (which may corrupt your system also), so besides the two points described above it's impossible to freeze you system.

I think the most probable reason is a hardware problem :-( .
Does the freeze also happen if you make a backup from the SATA disk to the SATA disk itself? Or from the PATA disk to the PATA disk itself (just to see if this might be the reason)?
Perhaps you can try to run your system at lowest cpu speed to double check if this helps? You can do this with the command 'cpufreq-set' (on ubuntu and gentoo which I'm using) or maybe via gui (at least with kde).

You can also try to swap the memory DIMs - this often helps in case of memory faults (I know from specialists in the fabric of a big computer vendor).

Sorry, but I've no other idea.

Heinz-Josef Claes <hjclaes>
Group administrator
Sun 06 Mar 2011 06:21:09 AM UTC, original submission:  

In my search for a good home backup system, this is the best I have come across.  I have successfully used it in the past (older version?).  But now every time I run it it freezes the system part way through, and my only recourse is the reset switch.

This is under Mandriva 2010.2 on a 4-core AMD CPU, and Fedora 6 on Intel.

It never freezes at the same point in the backup.
I have run with debug on, and checked all system logs as well, but not found anything that helps.

I have noticed that the system load gets quite high while running.

I am backing up from an internal SATA disk to an internal PATA disk. There is no network involved.

I tried using the --noCompress switch to prevent it running bzip2 on all 4 cores at once.

Once in the past I did manage to get a backup to complete after a number of attempts, but not this time.

I have 3 good backups from times past, but not anymore.



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