Re: backup archive format saved to disk
On Tue, Dec 05, 2006 at 11:01:49PM -0500, Douglas Tutty wrote:
> Thanks Mike,
> If I can attempt to summarize a portion of what you said:
> If the issue is resistance to data block errors, it doesn't
> matter if I use a file system or not so I may as well use a file
> system then if have difficulty, rip multiple copies of the file
> system bit by bit and do majority rules.
> There's a package (forget the name) that will do this
> with files: take multiple damaged copies and make one
> good copy if possible.
> Does the kernel software-raid in raid1 do this? Would there be any
> advantage/disadvantage to putting three partitions on the drive and
> setting them up as raid1? (and record the partition table [sfdisk -d]
If the drive electronics fails, for example, or a piece of abrasive
dirt is on the head during a seekm you lose all three partitions.
Better to have one partition on each of three separate drives.
* RAID1 with two drives
* reiserfs on the RAID (although I have been told that reiser has bad
resistance to power failures, I haven't changed yet; it's wonderfully
resilient to the software crashes I've been experiencing)
* backup by copying everything onto a dismountable hard disk and keeping
it on a shelf
* critical data kept in textual form and checked into monotone, which is
to be sync'ed to monotone repositories elsewhere (still setting this