----- Original Message -----
From: "Mr Ian Primus" <ian_primus at yahoo.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Tuesday, May 08, 2007 1:11 PM
Subject: Backups - was Re: 8mm data cartridges
 DLT is great, I use it a lot, and we also use it at
 work. Very reliable from what I've seen, only time you
 run into issues is with the drive itself, and really,
 really worn out tapes. If possible, verify backups on
 another tape drive, or at least verify them - I had
 one tape drive that would seem to write just fine, and
 never report any errors. But the tapes wouldn't read
 back! A backup you can't read is, well, not backed up.
 Then again, we don't use DLT as an archive - just for
 daily backups. I have no idea how readable this
 DLTTape IV cartridge will be in 20 years.
 Burning DVD or CD's is nice and "archival" since you
 can't overwrite them, but beware that some cheap media
 isn't really good for more than a few years. Of
 course, we've had discussions about media, longevity
 and how critical it is to make backups many times
 before... So backup often, backup in different ways,
 verify backups and most importantly, actually backup!
 And if you need to be sure the data will be around for
 years to come, you need to keep it live - keep it on
 newer media, newer hard drives, whatever.
 If the data is _really_ crucial, consider punching it
 into tape. Unlike cards, tape can't get dropped and
 knocked out of order. It's slow to punch and read
 though, so I simply rigged my TeleType to run at 19200
 baud. Hold on, the chad box is on fire again...
 -Ian 
MO media seems to be made to last a long time, plus it has a hard outer case
to protect it (unlike DVD or CD recordable).
Honestly how much of the GBs of files on your hard drive is user generated
and irreplaceable and how much is just OS/App bloat along with internet
downloads?
TZ