Hi, Matt!
Trying to kill the keyboard, Matt Fuerst ([EMAIL PROTECTED])
produced 1,6K in 39 lines:
> We just got an OnStream ADR 50 tape drive. Installing it and geting it ready
> should be a piece of cake (I am just waiting on the drive rails and have
> everything else prepped)
> Our situation is that we have a hardware RAID set up, with about 50 gigabytes
> of available space. Should be a perfect match, in theory.
The ADR 50 can take 25 'GB' native (i.e. 23.28 real GB ...
don't cha know? 1 Kb = 1000 b ...) without compression and
will write them in about 3.5 hours. Take another 3.5 hours
for comparison ...
See http://www.onstream.com/news/index.html#press18
> that could help us out completely. I worry that with just tarring up the drives
> they might be difficult to recover.
You'd take an average of just under 2 hours to locate a file on
the tape. Oh, and you don't want to use compression with tar
(one bad bit, and there go your 50 'GB' archive).
> Total newbie question here, but lets say I tar up everything on the drive, and
> copy it over to my tape drive. I have one huge tar file. My computer totally
> dies. I am then able to reinstall my OS of choice (RedHat 6.1) onto the
> machine. Can I then just untar the tar file back onto my machine (tar xvf
> mybackup.tar) and get everything back to how it was the moment I backed up. Our
> data isn't changing all that dynamically and up-to-the minute backup is not a
> high priority.
Yes, more or less. You'd want to have the correct partitioning
and so on set up first and all partitions mounted at the
(relative) correct spot. But that's independent of tar.
Personally, I like afio (which can compress on a per-file
basis[1] and can tell you where on the tape the files are
during creation/readback --- and you could just jump there
and go, if you still have the index file).
-Wolfgang
[1] so a bad bit will kill your file, but not the complete
archive.
