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RAID problems
We have been editing a documentary with 4.5TB of HD media on 2 G-RAID towers (G-Raid ES, E-sata) treated as 8 connected drives at RAID 0+1.
We have experienced all kinds of problems including severe crashing (10-15 times and hour), and long load times (the project takes about 10 minutes to load, the sequences take a while, thumbnails in sequences, etc).
I have re-installed all the software on the computer, I have had applecare check all the apple hardware, I have ditched the preferences folder many times— nothing has helped.
I dragged some media from the G-raids to the internal and worked from there and had no problems so I suspect its the G-raid towers.
So…we are going to rebuild the drives now and wonder of you have any suggestions for the best way to do this. Thanks so much.
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15 Replies
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[Nick August-Perna] “We have been editing a documentary with 4.5TB of HD media on 2 G-RAID towers (G-Raid ES, E-sata) treated as 8 connected drives at RAID 0+1.”
As in 8 individual drives? Why? That’s a horrible way to set this up. It should be set up either as two 4 drive RAIDs or 1 large 8 drive RAID striped together.
[Nick August-Perna] “We have experienced all kinds of problems including severe crashing (10-15 times and hour), and long load times (the project takes about 10 minutes to load, the sequences take a while, thumbnails in sequences, etc).”
Well yeah. You have media spread out over 8 locations. It’s gonna take a while and crashing would be expected with your media spread out like that.
[Nick August-Perna] “I dragged some media from the G-raids to the internal and worked from there and had no problems so I suspect its the G-raid towers.
So…we are going to rebuild the drives now and wonder of you have any suggestions for the best way to do this. Thanks so much.”
It’s not the towers, it’s your set up of them. Create two 4 Drive RAIDs or one large 8 drive RAID with both towers striped together.
And keep in mind you’re running RAID 0 so any hiccup and all your information is gone. We run our RAIDs in 5 to protect the data.
Walter Biscardi, Jr.
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Ok made a mistake. They are set up as 8 striped drives. It comes up on the desktop as 1 drive. It says there is 7TB capacity, 2.25 remain.
Any suggestions now? thanks.
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[Nick August-Perna] “Ok made a mistake. They are set up as 8 striped drives. It comes up on the desktop as 1 drive. It says there is 7TB capacity, 2.25 remain.
Any suggestions now? thanks.”
That’s better.
Move the media off, erase the entire RAID and be sure it’s set up Mac OS Extended and NOT Journaled.
Move all the media back on.
If you’re still having problems, run a speed test on the RAID to ensure you’re getting the proper performance from them. I don’t know what type of speed you’re getting but our 8TB RAIDs can run up to 550MB/s depending on how we configure them.
Walter Biscardi, Jr.
Editor, Colorist, Director, Writer, Consultant, Author.
HD Post and Production
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SO you have two SEPARATE G-Raid ES towers, and you raided them together as one drive? Hmmm…not sure if you should have done that. Having them internally as RAID 0 (their 4 drives) is in the design plan, so it should work fine. But to RAID 0 two separate boxes together…not sure if that is supported. Contact G-Tech tech support.
It would have been best to have them as two separate RAID-0 configurations. IMHO.
Shane
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[Shane Ross] “But to RAID 0 two separate boxes together…not sure if that is supported. Contact G-Tech tech support.”
Well there is that too. I guess I’m used to how our Maxx Digital Expando’s are set up to work together…
Definitely check with G-Tech and ensure you can stripe them all together as one big stripe.
Walter Biscardi, Jr.
Editor, Colorist, Director, Writer, Consultant, Author.
HD Post and Production
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Ok once again I was told the wrong thing by the producer, sorry…so the drives were striped as one and made a RAID 5, not 0+1.
Still suggest trying to format as NON journaled? I’m also on phone with G-tech support but they are stumped so far.
Thanks.
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Yeah, see, EXPANDO’s are designed to do this. That is a major selling point for them. Normally this isn’t something that is stable.
Shane
GETTING ORGANIZED WITH FINAL CUT PRO DVD…don’t miss it.
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So given that this may be unstable on these G-techs, how should I rebuild?
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[Nick August-Perna] “So given that this may be unstable on these G-techs, how should I rebuild?”
What Shane said. Two, independent RAIDs. Each box is its own raid.
Walter Biscardi, Jr.
Editor, Colorist, Director, Writer, Consultant, Author.
HD Post and Production
Biscardi Creative Media“Foul Water, Fiery Serpent” now in Post.
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Copy all the footage off onto another set of drives (tough, I know…that is a LOT of footage) and then reformat and set up each unit as a stand alone RAID setup. However G-Tech recommends you do it. I don’t have those units so I cannot say for sure how. G-Tech tech support should…or the product manual.
Then you will have TWO drives that show up, and you will need to copy the footage to both. A lot of reconnecting and reorganizing in this I’ll wager.
But this is a suggestion, not the ultimate answer. This is what I’d do.
Shane
GETTING ORGANIZED WITH FINAL CUT PRO DVD…don’t miss it.
Read my blog, Little Frog in High Def
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