full system backup

[Hannes Mayer]

Patrick Boutilier wrote:
> 
> 
> Hannes Mayer wrote:
> 
>> Edwin Dicker wrote:
>>
>>> Hi All,
>>>
>>> When I want to perform a full system backup to tape, Do I need to backup
>>> /sys/* as well ???
>>> I notice that my DLT is quite slow when performing the backup of the 
>>> /sys/*
>>> files.
>>>
>>> I get these kind of messages :
>>> cpio: File ./sys/class/scsi_host/host0/host_busy shrunk by 4094 bytes,
>>> padding with zeros
>>> ./sys/class/scsi_host/host0/host_busy
>>> cpio: File ./sys/class/scsi_host/host0/unique_id shrunk by 4094 bytes,
>>> padding with zeros
>>>
>>> I suspect that these files are all created when booting the system which
>>> means that they do not need to be backed-up
>>> Am I suspecting right or wrong ?
>>
>>
>>
>> Edwin,
>>
>> /sys, /proc and /dev are system directories and you don't need to backup
>> them, since they're recreated by the system anyway on every reboot.
>> Backing up those would make no sense, cause of the former reason.
>> Actually those are not regular files, but virtual files in the virtual 
>> file-system.
> 
> 
> /dev does not get recreated on reboot .
> 
> However you can get most dev entries back by installing the dev rpm. If 
> you have lots of custom devices in dev it wouldn't hurt to back them up.

Whoops... you're right! Sorry about that!

I'm not sure if a recovery of all other files will be possible in the first
case or if the system will then run without any problems ?
I too thought about this, but I'm still backing up only my data and not any
system files.

Cheers,
Hannes.