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SANmp with FCP problems

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Tony Alznauer
SANmp with FCP problems
on Dec 8, 2006 at 7:39:45 pm

Installed a SANmp fiber network (2g fiber) and am having strange disk speed issues. I have 3 Xserve RAIDs and each gets different write speed (apprx. 100mps, 50mps, and 15mps) and am unable to digitize even DV footage due to dropped frames and phantom TC breaks. All RAIDs are RAID 5 and partitioned in 300-400gb partitions.

Couldn't afford a proper install so had to do it ourselves and think we must have done something wrong. Didn't have these problems at a former workplace with professional install.

Installed everything as such.
5 workstations (all G5's) with Apple fiber cards and 2g fiber running (with SANmp software) to a QLogic 5200 switch, 3 Apple Xserve RAIDs also plugged into the fiber switch.

3 of the workstations have Blackmagic decklink cards (2 are Decklink HD Pro, one Decklink SD Pro).

We have no problems digitizing DV or uncompressed (including uncompressed HD) to local or eSATA drives but cannot digitize to the RAID partitions (including the ones that get 100mps according to the Blackmagic disk speed test software).

Of course SNS (SANmp)'s tech support says the problem isn't on their end, Blackmagic says it's not them... I'm frustrated.

Can anybody help? (I'm posting to both SAN and FCP groups)


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Shane Sokolosky
Re: SANmp with FCP problems
on Dec 8, 2006 at 8:15:29 pm

Are you setup to use RAID Admin on the X Serve RAID's? If so make sure the host cache flushing is disabled.

http://docs.info.apple.com/article.html?artnum=302780

Are you making 3 different volumes?

Shane Sokolosky

SAN Product Manager
ProMax Systems inc.
16 Technology Dr. Ste.106
Irvine, CA. 92618

Office (949) 727-3977 x108
Toll free (877) 776-6292
Fax (949) 727-7002
Website-http://www.Promax.com
shane.sokolosky@promax.com


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Tony Alznauer
Re: SANmp with FCP problems
on Dec 8, 2006 at 8:41:57 pm

I'll try it immediately.

The each side of each RAID is partitioned into 3-5 partitions. So we have a total of 24 partitions ranging from 350-447gb.



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Shane Sokolosky
Re: SANmp with FCP problems
on Dec 8, 2006 at 9:48:37 pm

Why so many partitions? Don't you only need like 5 (one for each station) or may be 6 one as a spare to put misc. files on?

If the problem is still there, feel free to call or e-mail me directly!


Shane Sokolosky

SAN Product Manager
ProMax Systems inc.
16 Technology Dr. Ste.106
Irvine, CA. 92618

Office (949) 727-3977 x108
Toll free (877) 776-6292
Fax (949) 727-7002
Website-http://www.Promax.com
shane.sokolosky@promax.com


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Tony Alznauer
RESOLVED
on Dec 9, 2006 at 1:54:17 am

Disabling host cache flushing fixed the problem.

Thanks, Shane


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