Promise Pegasus R4 8tb RAID config?

[Oliver Peters]

“Does RAID 6 offer any advantages?”

Yes. It’s not unheard of to have a second drive fail while the RAID is rebuilding itself from the first drive replacement. A RAID 5 array is a good workspace, but don’t rely on it for true long term storage, especially if it’s on 24/7.

Oliver

Oliver Peters Post Production Services, LLC
Orlando, FL
http://www.oliverpeters.com

[Herb Sevush]

[Mark Slocombe] “Does RAID 6 offer any advantages?”

More security, less storage, less speed. But even raid 6 is not totally safe – I’ve had a raid get corrupted even without drive failure. You have to find your own balance.

That being said, most editors are either raid 0 for speed or raid 5 for safety.

Herb Sevush
Zebra Productions
—————————
nothin’ attached to nothin’
“Deciding the spine is the process of editing” F. Bieberkopf

[Jeremy Garchow]

Raid6 also knocks thecaiacity down by two full drives.

Your 8TB is now 4TB formatted.

Raid5 only uses the capacity of one drive, so your 8TB is 6TB formatted.

For a four drive raid, raid 5 will be great.

Jeremy

[Herb Sevush]

[Jeremy Garchow] “Raid6 also knocks thecaiacity down by two full drives. “

I’ve often had problems with my thecaiacity, but I find if I just lay down for a few minutes it clears up.

Herb Sevush
Zebra Productions
—————————
nothin’ attached to nothin’
“Deciding the spine is the process of editing” F. Bieberkopf

[David Roth weiss]

[Mark Slocombe] “Does RAID 6 offer any advantages?
“

RAID-6 on a small four-drive enclosure is a waste of your resources. You’d be using the most expensive storage you have for protection that, as Herb said, really doesn’t give you ultimate security, as even RAID-6 can still fail. It only makes good sense for huge facilities with massive storage that absolutely have to be running 24/7.

Making a backup of the RAID-5 protected storage to inexpensive 2nd-tier firewire drives give you real protection, because you’ll have redundancy.

The best of all worlds for your data safety is three levels of storage:

1) ONLINE STORAGE: RAID-5 protected storage (or 6 if you’re big)
2) NEARLINE BACKUP: a 2nd tier redundant copy to inexpensive storage
3) LONG TERM ARCHIVAL: LTO tape or BluRay disc

David Roth Weiss
ProMax Systems
Burbank
DRW@ProMax.com
http://www.ProMax.com

David is a Creative COW contributing editor and a forum host of the Apple Final Cut Pro forum.

[Jeremy Garchow]

[Herb Sevush] “I’ve often had problems with my thecaiacity, but I find if I just lay down for a few minutes it clears up.”

I’m so glad we are speaking the same language and we find ourselves in solidarity.

Hopefully my iPhone will someday learn thecaiacity really means the capacity, becuase this obviously not my fault.

[Herb Sevush]

[Jeremy Garchow] “Hopefully my iPhone will someday learn thecaiacity really means the capacity, becuase this obviously not my fault.”

Don’t know if you’ve seen this site of mangled iphone texts. bound to make you laugh.

https://damnyouautocorrect.com/13603/the-25-funniest-autocorrects-of-dyacs-first-year/

Herb Sevush
Zebra Productions
—————————
nothin’ attached to nothin’
“Deciding the spine is the process of editing” F. Bieberkopf

[Herb Sevush]

[David Roth Weiss] “The best of all worlds for your data safety is three levels of storage:

1) ONLINE STORAGE: RAID-5 protected storage (or 6 if you’re big)
2) NEARLINE BACKUP: a 2nd tier redundant copy to inexpensive storage
3) LONG TERM ARCHIVAL: LTO tape or BluRay disc”

I know this is the basic business archival plan but I don’t really see the value in “nearline backup” if you can afford LTO. An LTO drive is on my shopping list and one of the ways I can justify it’s cost is by no longer storing backups on hard drives. The whole “nearline/long term” backup system seems to be more the preserve of big business where they have off sight LTO storage, as opposed to an editorial environment.

Herb Sevush
Zebra Productions
—————————
nothin’ attached to nothin’
“Deciding the spine is the process of editing” F. Bieberkopf

[David Roth weiss]

[Herb Sevush] “The whole “nearline/long term” backup system seems to be more the preserve of big business where they have off sight LTO storage, as opposed to an editorial environment.”

Not exactly Herb… In case of RAID failure, LTO backup would get you back up and running in a day, or within 4 to 5 hours possibly. The near-line solution gets you up and running almost instantly, or in an hour or so for most projects.

So, the 3-tiered system I advocate is really for anyone who can’t afford to be a day late or a dollar short… 🙂

Or, at least for your clients who think that way.

Make sense?

David Roth Weiss
ProMax Systems
Burbank
DRW@ProMax.com
http://www.ProMax.com

David is a Creative COW contributing editor and a forum host of the Apple Final Cut Pro forum.

[Joseph W. bourke]

And don’t forget a set of drives off-site. No amount of backup will do you any good if it’s melted and crispy in the basement of a burned out facility.

Joe Bourke
Owner/Creative Director
Bourke Media
http://www.bourkemedia.com