[Leaplist] burn dvd backup

[Bryan J Smith]

Ingo Claro wrote:  
> I need to make a backup to DVD's, the backup could span
> throu multiple dvds.  So what is the best option to do that?
> with a command line only (it's a server).
 
DVDs have been pre-selected? I guess I'd be more interested
in knowing what your recovery and retention strategy is?
The backup is just a small part of the mechanism.

Mondo Rescue is a commonly quoted option, which has a
terminal user interface (TUI) as well as command line
interface (CLI).  I also like to write my own scripts
around
mkisofs and afio, the latter has size/multi-volume options.

The problem with multi-volume is if you lose a volume or
a portion of the volume. That's why I advocate only using
DVD as a "point backup" solution, and not a full recovery
option.

> It would be ideal to not make all the archives to HD and
> then burn them becouse of disk free space limitation... 

Agreed, but that can be a further issue. Although you can
stream directly to optical, it can have issues. And many
times its still a buffered queue, so it's going on the hard
drive anyway. In fact, if you're concerned with temporary
hard drive usage, then you have not planned your storage
well.  These days 25-50% of your data usage should be reserved
for snapshots, temporary store, etc...

If you really want to stream directly to a backup media,
then consider using removable 2.5" disks instead.  You can
get a 2x2.5" hot swap bay that fits in a 3.5" bay or a 4x2.5"
hot swap bay that fits in a 5.25" bay.  A 3Ware 2-channel
PCIe x1 card that will facilitate safe removal only runs about
$100 or so.  Or you can use the kernel hotswap on regular
SATA channels.  In either case, at sub-$0.20/GB, 2.5" SATA
drives are very cost effective, take 25x the shock and
off-line duration of 3.5" drives, etc...

--  
Bryan J Smith - mailto:b.j.smith at ieee.org  
http://thebs413.blogspot.com  
Sent via BlackBerry from T-Mobile  
    
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