Tape drive is expensive (US$5K list).




that is cheap compared to a DVCPro HD deck!
http://www.bhphotovideo.com/c/product/536332-REG/Panasonic_AJ_HD1800_AJ_HD1800_DVCPRO_HD_Studio.html

I use optical and hard drive backups personally.

Optical is okay for medium to long term backups. But we still need to check the optical medium for "rot" every two years or so. NEVER use HDD for long term backups. Too many things can go wrong - motor, head positioning mechanisms, the bearings, etc ... there are just too many mechanical parts in a HDD. HDDs are okay to backup the working set. The best long term storage medium is still TAPE.

As Barry said - DVCPro HD tape decks are a huge step in the wrong direction. They are very slow and you will loose the META data going that way.

LTO3 (and 4) tape drives prices are list prices. You can get them cheaper from the dealers - I have seen LTO3 drives going down as low as US$3K. Tapes are US$80 for 800 Gigabytes capacity.

I use g-tech exclusively. I very primitively gaff tape the project name on the side of a G-Raid 2, 1 TB drive and stack accordingly. One large project @ DVCPRO HD or a couple smaller ones do well on the TB drive. As of now, I have 3 separate TB drives, a couple of 500 MB and a couple of 40s that I got for free at NAB last year that come in amazingly handy.

As my own infrastructure grows, I will need to amend this system... but for now, it's nice knowing the info is safe on separate drives and G-Tech has proven to be reliable thus far.

Joe.

I have been using DLT since around 1996. I abanonded DLT around 2002. Never used the LTO machines. While it is a robust technology, the ease of use and cost vs hard drive storage persuaded us go with hard drive backup. Digital tape technology also can fail. I have had at least 2-3 tape units fail and require expensive repairs. In those cases they also damaged the DLT tapes in the transports. So DLT is not 100% failure proof. It is also much slower than harddrives. Random access times for retrieval are painfully slow compared to hard drives.

We are now using hard drives for P2 backup. Wiebetech interfaces allow raw internal drives to be used and swapped out with little effort. In our experience hard drive failures from shelving them are rare. (has never happened to me since 2002) As long as they are in climate controlled environments. I have Seagate 18GB RAID harddrives from 1996 that spin up fine. No issues. I very rarely mount those RAID and they sit on the shelf. So, the definitive statements about the use of harddrives as long term storage are not definitive as those making them would like to believe.

While spinning up drives on a regular basis is probably great, is it nessesary and proven to be effective maintenance or just guess work? For instance, who has done the research that shows a weekly spin up vs a monthly vs a 6 monthly vs a yearly spin up would result in any difference? I would think it's more of guess work that sounds good rather than actual fact. I think because the platters are sealed, and not exposed to the atmosphere, they will last a long time on a shelf regardless of use.

For linear tapes, perhaps the glues that hold the oxides on the polymer will dissolve before the hard drive's bearings will oxidize and seize.

It's amazing nobody was selling plastic archive cases for hard drives before last month.

Dave,

Thanks for the great feedback on DLT tape transport. I am not sure what exactly is your problem - but, my former company (an airline) has been backing up their Open System data (amounting to roughly 800TB) on SDLT and LTO tape drives daily. If that tape/transport is that bad - they will be the first people to scream on a regular basis. I haven't heard anybody bad mouth any SDLT or LTO tape stuff so far ... And theirs is a daily operation ...

I'd like to find out, esp from the other 'Wong' countryman :) -

How robust / costly are the tape heads for the DLO or similar data tape back up solutions then ?

Digibeta / DVC pro HD : all these video format tapes are excruciatingly expensive.



I am investigating and trying to come up with an enterprise solution for video data backup (like p2 and xdcam ex) inclusive of NLE editing project files. I really need lots of back data since this is for an institute of learning.

Sincerely,

Wesley Wong

Hi the "other Wong" :-),

I guess you must be from one of the Polys? Temasek, Republic, Nee Ann?

Head replacement for DLT, SDLT, LTO ... the h/w cost is okay. It is the labour cost that kills. One only replaces heads once in a blue moon - maybe, once in 5 years ... if you are in one of those Polys (and Universities) - just ask a vendor to do that for you.

Here, we are doing daily backups of the Open System data - now, maybe - 1PB worth (1,000 TB). Dumping data into SDLT and/or LTO tape drives. We connect the tape drives by SCSI, ESCON, Fibre Channel, etc ... to the data base machines.

Video data (P2, XDCAM, etc) - are all computer data. So, it makes NO difference here - whether you are backing up databases or video data - it is all bits and bytes. VERY much faster to backup and restore as well.

Forget about Digibeta or DVCPRO HD tape machines - they only go real time (100 hours of video - takes 100 hours to backup). And costs an arm and a leg as well.