Hi,
I´ve installed an G5 with 2xraptors (73Gb) with Apples own RAID tool,
their in RAID0, It works very very well..
mail me if you have any questions:
jan at opsethgruppen dot no
regards,
jan opseth
Originally Posted by tylerr
Hi,
I´ve installed an G5 with 2xraptors (73Gb) with Apples own RAID tool,
their in RAID0, It works very very well..
mail me if you have any questions:
jan at opsethgruppen dot no
regards,
jan opseth
Originally Posted by tylerr
works even better if you put the system on a different disc.Originally Posted by Unregistered
( it does make a difference with accuracy of playback over long segments on 4 layers - I know martin had a few issues with this in norway )
it more important in ntsc 30hz systems which have to work faster.
we only have to work at 25hz in europe - but an issue with dl1's makes them work better at 30hz too.
--
The system can interupt playback when it does house keeping or any other work - that involves disc access, or virtual memory.
We tested this and found out that we did not get any more performance on a raid than on 1 std disk and 1 sata. os on one and cat on the other.Originally Posted by samsc
besides, when one disk fucks up, you can keep a backup on the other, so you can (hopefully) still do the show. As for the playback sync problem, the use layer function saved the day.
keeping the os separate gives slightly better performance over the long term - minutes -Originally Posted by Martin
i dont think using an internal raid is good either. if one disc goes down - you loose everything.
there is no difference between using 1 or 2 raptors - unless you need the extra gb capacity - or unless you want to play back uncompressed movies.
Originally Posted by Martin
It´s very strange you did´t see any better perf. with Raid0.. I tested this.. with and without... i did see better results with RAID
you should´t be worried the disk´s should crash.. does the OS disk fail your f...ed anyway.. If you shall be totaly backed up You should do Raid 3 or 5 external.. Better yet is SCSI 15k Cheetah´s, I have 2pc of this ones in my Windows computer in Raid 0 and I´m seeing a lot of a difference..
(vs. s-ata), so it´s a difference with RAID.
Disks rearly f... (as long as you don´t have IBM´s) What if your disk in your GrandMA or WH3 fails? THEN you are f..
Jan O..
Which Application?Originally Posted by Jan Opseth
What kindof tests did you do?
I did use Xbench 1.1.3..Originally Posted by samsc
catalyst is not a datarate limited application - its a seek rate, and rotational latency limited application and io/ops/second limitedOriginally Posted by Jan Opseth
The headline datarate is not relevant.
Whats important is how fast the drive works- up to a point, and then no more.
In my testing, 2 drives was not better than one - playing back 4 movies on 4 layers at 25fps. A single drive was better.
Catalyst is not a normal application wrt disc use. Its quite different.
We tested it with the Apple people, and as you can see from the Catalyst benchmark tests, it´s not a special difference. We also tested raptors V Scsi raid at the workshop yesterday, and only on uncompressed and on 4 layers is there a noticable difference. On standard DVpal, the difference is not visible.
I assume that when you are adding a SCSI drive you are pulling the power off of the optical drive for the ATI Radeon 9800 pro and for the SCSI drive.
Tyler
Tyler Roach
Eclipse Creativity, Inc.