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vaz
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RAID Raptors
« Thread Started on Oct 14, 2007, 12:58am »
The only speed boost left for me until someone comes out with a dual 2ghz cpu upgrade, is my hard drive.

I'm going all out by RAIDing 2 of the fastest drives together. The Mighty 10k Raptor!
I'll be using a sonnet pci sata card. This will total 7 hard drives in my MDD mac. I hope the power supply can manage 2 more 10k drives. This will be my boot drive and everything should be snappy with little load times.

Does anyone know which block size to use for maximum speed?? 4k or 128k?
I'll be benchmarking different sizes, and was wondering what others experienced.

This should boost my xbench score around 75 i'm guessing. I'm 63 right now and 100% stable.
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Re: RAID Raptors
« Reply #1 on Oct 14, 2007, 4:40pm »
The highest MDD upgrade is the Sonnet MDD CPU upgrade and that's a dual 1.8
It's not dual 2's but it should be pretty snappy none the less. Maybe your MDD is only 133mhz FSB but there is a mod to set that to 167mhz FSB. I'm trying to find it, but it seems the page went down in history.


Edit.
HAHA, i found it
http://www.macbidouille.com/article.php?id=89&page=3
Change a MDD from 133 to 167.
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Re: RAID Raptors
« Reply #2 on Oct 14, 2007, 7:22pm »
Vaz,
You do realize that Raptors are only SATA I, right? The reason I ask is that neither the HDD or the PCI slot can take advantage of the SATA 3.0 speeds. (33 MHz * 64 bits = 264 MB/sec. Yes it is close) That being the case you might look into FirmTeks SeriTek 1V4 card. It matches the Raptors data rate (1.5 Gb/sec) and costs $80.00 less. If you are worried about quailty it was confirmed to me by Sonnet that Firmtek makes the Sonnet card. Just my $.02 worth. Best of luck.

Cheers,
Chris
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Re: RAID Raptors
« Reply #3 on Oct 15, 2007, 1:53am »
Hehe, i have one of those 1V4 cards. No SATA drives hooked up to it yet, but i am looking into it. I heard that those cards are supposed to be fast.
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Re: RAID Raptors
« Reply #4 on Oct 15, 2007, 2:08am »
Red,
I have one too. The speed increases are indeed awesome. Between that and the fact that the card removes the 128 MB storage limitation (I wonder if 4 TBs is possible? Or 2 TBs in RAID 0+1?) the G4 will probably become a media server.
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Re: RAID Raptors
« Reply #5 on Oct 19, 2007, 12:42am »

Quote:
Red,
I have one too. The speed increases are indeed awesome. Between that and the fact that the card removes the 128 MB storage limitation (I wonder if 4 TBs is possible? Or 2 TBs in RAID 0+1?) the G4 will probably become a media server.


Errr, I meant 128 GB, DOH!
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Re: RAID Raptors
« Reply #6 on Oct 19, 2007, 11:15am »
This limitation does concern some G4 pre-MDD, like the Cube (FSB 100Mhz), but not the MDD ? Am I wrong ?
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Re: RAID Raptors
« Reply #7 on Oct 19, 2007, 4:13pm »
No you are right bb, MDD's have no hard drive limitation. I also heard that some of the very late Quicksilvers could also address HDD's over 127 gigs.
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Re: RAID Raptors
« Reply #8 on Oct 21, 2007, 11:02pm »
yes aqua,
after surfing on the forum from macbidouille.com, I found the explanation (limitation is due to the ATA connector equal or less than 66 mhz)with a link to the Intech site :
http://www.speedtools.com/ATA6.shtml ;D which refers also to :
http://docs.info.apple.com/article.html?artnum=86178
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Re: RAID Raptors
« Reply #9 on Oct 21, 2007, 11:09pm »

Quote:
No you are right bb, MDD's have no hard drive limitation. I also heard that some of the very late Quicksilvers could also address HDD's over 127 gigs.


from the apple.doc link above :
The BootROM of Power Mac G4 (Mirrored Drive Doors), Xserve, Power Mac G5, and any other model introduced after June 2002 can accommodate these larger drives.
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Re: RAID Raptors
« Reply #10 on Oct 23, 2007, 3:29pm »
I'll be using a sonnet sata card yes. I'm 167mhz bus.
I don't think i'll max out sata 1.5 with 2 raptors. I'm expecting around 150mb throughput anyways

So having that info, what block size is optimal for a startup system drive?

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Re: RAID Raptors
« Reply #11 on Nov 9, 2007, 8:29pm »
And if you get yourself a ATTO UL4D SCSI Card, you can get a Performance of 640 MB/s with 1x HD, & 320 MB/s with 2x HD's. It's the fastest way. Downside is that the Drives run 15,000 RPM = Heat, Noise. & Price.
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Re: RAID Raptors
« Reply #12 on Nov 9, 2007, 8:33pm »
Oh and MDD & Quicksilver Macs have no Drive Limit. Older Macs before 2002 have a limit of 127 GB. It dosen't matter if Put like 750 GB in a MDD, in CUBE it will only Address the first 127 GB.
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Re: RAID Raptors
« Reply #13 on Nov 10, 2007, 10:25am »
Yes indeed. In a earlier comment I gave the Apple doc page link which refers to the limitation:

http://docs.info.apple.com/article.html?artnum=86178
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Re: RAID Raptors
« Reply #14 on Jan 29, 2008, 4:47pm »
Okay on QuickBench benchmarks, i hit a max speed of 116MB/sec.
At 64k blocks it seems to do large files quite nicely.
Since i'm use a pci sata card which is 133mhz or 266MB/sec, i wonder why i'm not getting faster benchmark speed? Any input?
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