Promise VTrak 16 bay speeds ?
by Bob Zelin
on
Jun 17, 2008 at 11:41:28 pm
I am seeing on FCP-L that the 16 bay VTrak is running just over 200mb/sec. This is impossible, right? There is no way that a new 16 bay Promise VTrak is running as slow as an XServe RAID, right ? These guys are doing something wrong - aren't they ?
Re: Promise VTrak 16 bay speeds ? by Peter Wiggins on Jun 18, 2008 at 2:11:02 pm
The web site says 1437MBs read, 617MBs write on the keynote presentation
Peter
Re: Promise VTrak 16 bay speeds ? by Bob Zelin on Jun 18, 2008 at 2:19:13 pm
From Jay Mahavier on the FCP-L list - his results after much suffering -
Bob Zelin -
Ok, so I decided to ruin my night. With the AJA System Test settings
at 1920 10bit RGB and 16GB file I'm now getting
Write - 415MB/s
Read - 595MB/s
Yea, that's better.
So here is what I did in the WebPAM PROe software.
For the Controllers make sure that Host Cache Flushing is unchecked,
Enable LUN Affinity IS checked, and that Forced Read Ahead IS checked.
Do that for both controllers.
Go to Disk Arrays
Deselect both PDM and Media Patrol, then select all the odd drives
and move to selected and click Next.
I used
Raid 0
Full Capacity
Stripe = 1
Sector = 512
Read = ReadCache
Write = WriteBack
Preferred = 1 (this is where you set the controller the drives use)
Select Update, then Next, then Submit.
Go to Disk Arrays and do this again for the other drives, the even
ones, but this time set the Preferred setting to 2 so that the drives
use the other controller.
Then go to Apple's Disk Utility and under Raid stripe them together.
I just used stripe and the default block size.
