Am 02.04.2007 um 13:41 schrieb Kevin Thorpe:
a little off-topic but I'm looking into replacing our old DDS4
tape drive which is now too small.
Our choice now looks like LTO, AIT or DLT as our total backup size
is now 80Gb. Has anyone got any good/bad experiences with any of
these technologies? I'm assuming that all will be recognised by
SuSE on our servier which has both SATA and SCSI. What's the
cheapest to buy and run?
We currently use LTO. It works ok - for a tape. As all tapes it is
slow as hell
for recovery case, a LTO media is mechanically robust but can't be
used that often (we change media after 15 backup cycles and already
had rejected tapes).
Next time we need to change backup system we will go to USB/eSATA
disks - one disk for each tape media we currently have in use:
Pro:
- you don't need an expensive tape-drive
- you can already have 1TB per media
- you can reuse such a disk much more often then 15 times
- you can have fast as hell selective restores on every cheap PC
- backup time via rsync like programs is nearly as fast as
incremental backups, but you have full access to your complete backup
without having to deal with multiple media
- you can switch to next generation disks without a new expensive
tape-drive
Contra:
- a single media is a bit more expensive
- a disk is not as robust as a tape media
- a disk _may_ not be usable as long as a tape media
- at least 3.5" disks are a little bit bigger then LTO tape media
This is not a solution for a 1000 people company, but for a server
with up to a
terrabyte online storage it is a robust, easy to handle, relatively
cheap and
reliable solution. It may not be a solution if you have to archive
financial
data for your local tax institute - IANAL. But if you "only" have to
deal with important data it is better then most solutions I know about.
Regards
Ralf
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