To answer the BRU question...Yes it stores a catalog, it's just faster when you save the catalog separately to a CD or USB drive. Otherwise BRU has to scan to the end of the last tape to load the catalog. If you know which tape is the last one in the set, it scans to end of data and reads it (takes 10 or 15 minutes usually).
If you are sending some backup sets out of house or to another system, BRU can automatically make a restore disc, with a copy of the catalog, and a read only version of BRU that lets you restore on other systems with out a licensed copy. It's also OS agnostic, works on Mac OSX, Windows and Linux.
ON the Cache systems, they include a lot of hardware that may not be necessary, and have a starting price point for a base system about twice to three times what you pay for a standalone LTO6 drive. I am not sure, but don't you also have to copy to the Cache's internal HDs to do a backup to tape? IIRC they start at 7 to 8 thousand for a basic system, and go up to 15 thousand for a normal setup. They are also not as fast as stand-alone drives.
On performance...Newer LTO6 drives with SAS or Thunderbolt do have the capacity to well out perform HDs. I tested this with backups of several terabytes, thousands of files. Only way I could keep up with the speed of the LTO6 over SAS or thunderbolt was by reading and writing to very fast multi HD disk arrays.
On tape capacity...My error, largest tapes for LTO6 are designated 2.5/6 TB tapes. Their uncompressed tape capacity is 2.5 TB. The 6 TB number assumes a compression of about 2.5 to 1, which is seldom seen in the real world. Here is a link to a Tolis Group Knowledge Base article on tape capacities:
Dave Hogan
Burbank, CA
On Tuesday, February 3, 2015 10:35 AM, "bigfish@pacbell.net [Avid-L2]" <Avid-L2@yahoogroups.com> wrote:
I don't deal directly with LTO but have always been under the impression it was slower than a hard drive backup. Is LTO 6 markedly faster than LTO 4 and 5? At 400MB/sec that's roughly 2.5 times faster than what I see on my 4TB Hitachi Deskstar 7200 drives. They usually hover at 150MB/sec or less depending on which sector they are writing/reading and fragmentation. I'll have to google up some LTO bandwidth data as I'd always heard in practice Hard Drives are much faster to retrieve backed up data from. At the 400MB/sec throughput is it still possible to access individual files like LTFS claims?
---In avid-l2@yahoogroups.com, <mactvman@...> wrote :
LTO 6 drives are about $2,500. BRE (Tolis) or Pre-roll post (Imagine Products) are both 600.00 for a single license.
You need a machine with a PCIe slot, preferably PCIe 2.x or 3.x. ATTO SAS controllers are around $400.00.
If you have a trashcan MacPro or MacBook Pro you instead need an adapter to go from Thunderbolt to SAS (Atto, about $1,200.00). Alternatively, you can get an mTape drive (with built in thunderbolt interface) from Imagine Products (3,600.00)
LTO 6 drives are fast. Properly setup, they can read and write at around 400 MB/sec, if your disk storage is fast enough.
Single tapes are about $50.00 to $60.00 if bought in 5 packs. They are called 2.5TB tapes, but that's assuming compression of 2.5 to 1, which you never get out of already compressed video media files. In real world use, I wouldn't plan on much over 1 TB per tape, then be pleasantly surprised when you get more. LTO is an industry standard, with newer drives supposed to be able to read old tapes. Shelf life of tapes is nominally 15 to 30 years. If you beat a tape to death and re-use it a lot plan on the 15 or less number. If you back up and shelve it, more like the 30 year number should be expected.
When you are done with a project, back it up to LTO...Don't be mislead by the false promise of LTFS, which is supposed to make tapes look like removable HDs. It is unreliable, and crashes a lot when you try to use it like an HD. Use backup software that reads/writes to it in a linear fashion.
Did an evaluation of several pieces of backup software recently for a client, and I found by far the best speed performer, best support and for the most part simplest use to be BRU by Tolis. Retrospect was 2nd place in performance, but way more expensive. Pre-Roll Post is comparable in price to BRU but a much slower performer that relies on LTFS (see previous paragraph.) Pre-Roll post also puts on the tape sorted by size, so recovery of sub folders can cause the drive to beat the tape to death, moving all over the tape to restore just one folder. This behavior can be re-programmed, but it's not intuitive.
Using the mTape and or Pre-roll Post you have to run OS X 10.8 or better, or windows 7 or better.
Using a SAS drive and ATTO SAS controller, you can use older OS/drivers. I tested on a 1st generation MacPro tower, using OSX 10.7.5 (32bit boot) and got speeds of 400MB/sec to and from an internal 4 drive raid0.
Your mileage may vary...
Dave Hogan
Burbank, CA
On Monday, February 2, 2015 2:03 PM, "Agustin Goya agustingoya@... [Avid-L2]" <Avid-L2@yahoogroups.com> wrote:
I've seen some Axle demos and looks promising but don't know how it works in the real world.
I can recommend Masstech, it has great Integration with Avid workflows and can archive Media directly from Media Composer to an LTO library, this solutions are targeted to broadcast environments, are highly customized, runs only on specific hardware and have a lot of additional features that make it quite expensive for a small shop.
I can recommend Masstech, it has great Integration with Avid workflows and can archive Media directly from Media Composer to an LTO library, this solutions are targeted to broadcast environments, are highly customized, runs only on specific hardware and have a lot of additional features that make it quite expensive for a small shop.
I don't know if CatDV has an archive option, that might also be a good option.
Hope this help.
Agustin
Enviado desde mi teléfono.
El feb 2, 2015 5:25 PM, "prvteam47@... [Avid-L2]" <Avid-L2@yahoogroups.com> escribió:
Hi to all,Two Questions:Q1: Media Composer Backup - I was wondering if you all could tell me the ways you backup, store, all your mxf... files, menus, and other clips related to projects.I have been using media mover and just trying to keep projects on g-tech drives, but it's been a pain over the last couple of years with how many projects I have been involved in.I guess this is also a workflow question as well.Q2: Long Term Storage Solutions -I would like to create almost a storage center for all my media, but something were all my computers can connect.I currently run two avid media composers and would love to get them on the same page.I capture with a P2 deck and store those clips on independent hard drives as well and then eventually bring them back into Avid in the future when needed.Any ideas and suggestions would be appreciated.
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Posted by: Dave Hogan <mactvman@yahoo.com>
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