Max No. of Drives in a Raid0 stripe ?

Hi,
I suspect I know the answer already (which is no..) but can i increase my raid from a 2 drive stripe Raid0 to a 4 drive stripe Raid0 on my K7T266-Pro2 onboard raid controller ??
Looking at the Rocket Raid PCI cards you can have up to 4 on a strip array and on the quad controller version up to 8 !
I suspect the PCI bus is the main limitation at a theoritical max of 133mb/s (@33mhz) anyhow but it sound good !
Cheers for any advice on speed my discs up !
Graeme

Quote
Originally posted by WaltC
I hope this is not meant as a general comment on RAID 0 versus standard IDE. Because if so it's completely wrong. My RAID 0 setup performs roughly 2x as fast as the standard IDE hookup in sustained operation with the same drive. This ratio holds well across a spectrum of benchmarks. The performance difference is obvious and noticeable even in the absence of benchmarks.
The specific make and model drive has a lot to do with speed improvements as well. WD's JB models don't do as well as expected in RAID-0 because the cache algo is optomised for its 8 megs in a standard desktop environment. Also witness Seagate's still relatively new policy of replacing Cuda IV models that do poorly in RAID-0 with models that have revised firmware, which do quite a bit better. I've seen no mention of these things mentioned in this forum but they are well known elsewhere.

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Thanks for all the info guys, so I decided to make the move then and all went pretty good. Moving the array didn't need any more setting up, just hooked'm up to the other 2 ports in the right order and it was detected without any more configuration in the raid bios.
Tho I made 1 little mistake the first time, I had sata3&4 disabled before in bios so when I switched my array and tried to boot windows it just kept crashing & rebooting because it didn't have the drivers loaded. So I switched back to 1&2 enabled 3&4 in bios let the drivers install in winxp, rebooted, switched to 3&4 again and it worked like a charm.
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I have 2 volume manager raid0 stripe volmes (d61 & d62) which are mirrored (d60 - see below), when the submirrors were created we ommited to increase the interlace size (-i 1024), can i metaclear d61 and recreate with -i 1024 and reattach/resync and then metaclear d62 and recreate with -i 1024 and reattach/resync?? i.e during the transition i would have one half of the mirror with 1 interlace size and the second half of the mirror with a different interlace size or is it best to backup the volume and recerate the whole stripe/mirror volume and the restore the data.
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d60: Mirror
Submirror 0: d61
State: Okay
Submirror 1: d62
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Pass: 1
Read option: roundrobin (default)
Write option: parallel (default)
Size: 1432370625 blocks (683 GB)
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Device Start Block Dbase State Reloc Hot Spare
c3t0d0s0 0 No Okay Yes
c3t1d0s0 4375 No Okay Yes
c3t2d0s0 4375 No Okay Yes
c3t3d0s0 4375 No Okay Yes
c3t4d0s0 4375 No Okay Yes
d62: Submirror of d60
State: Okay
Size: 1432370625 blocks (683 GB)
Stripe 0: (interlace: 32 blocks)
Device Start Block Dbase State Reloc Hot Spare
c4t0d0s0 0 No Okay Yes
c4t1d0s0 4375 No Okay Yes
c4t2d0s0 4375 No Okay Yes
c4t3d0s0 4375 No Okay Yes
c4t4d0s0 4375 No Okay Yes

Hi,
Sun support confirmed that you can have the 2 halfs of the mirror with different interlace sizes, this obviously is not the optimum setup, but will allow me to detach d61 and recreate with correct interlace size, reattach d61 and let it resync, then detach d62 and recreate with correct interlace size and finally reattach d62 and let that resync
Kevin....

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Hello guys,
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Software developer
www.mcm-electronics.com
PS: Don't forget to rate a good anwser ; )
Currently using Labview 2011
PORTUGAL

Hi Jorge,
What can be done is to create an installer with LabVIEW, if you have LabVIEW 8.0 or later, you can use you project to do so. If you don’t have this software installed on your computer(s) you can also export MAX configuration from you development machine and import it on your vision-testing machine.
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Hi all
A friend has ordered a new Xserve, which comes with an 80Gb drive.
He's also ordered 3 x 500Gb drive modules.
What is the best way to set-up the Xserve?
My friend does design and makes up pages in Quark 6 with Photoshop .eps files linked. All his images are hires.
He makes pdf's hi and lores versions.
He currently has retrospect backing up his current server (OS Server and firewire drives), which could be used to back up his new server, the machines are in different rooms.
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Mirroring will result in a final volume size equal to the smallest drive in the mirror (e.g., mirroring two 500GB drive results in a 500GB volume).
Striping results in a final volume equal to the sum of its parts (striping two 500GB drives will result in a 1TB volume).
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For his workflow you might find the performance of a stripe to be beneficial, even if you don't need all the space, but you will need to be aware than a failure of any drive in the stripe will render the entire volume useless.
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Thanks

dennis48082 wrote:
so the 1 TB available at my local electronics place will not work?
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im using the 3ware 8506-4LP with 4 WD 250 GB Caviar Drives(7200rpm).. What would be the ideal stripe size for :
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ive read that 64k is ideal for windows..
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my current plan is to use 2 of the drives with a stripe size of 64k with windows and the other two with linux.. im a general desktop user, bit of divx encoding and lots of compiling. Im using the AMD FX-55 with 2GB of RAM
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Hi,
Sun support confirmed that you can have the 2 halfs of the mirror with different interlace sizes, this obviously is not the optimum setup, but will allow me to detach d61 and recreate with correct interlace size, reattach d61 and let it resync, then detach d62 and recreate with correct interlace size and finally reattach d62 and let that resync
Kevin....

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Hi,
I purchased a refurbished Z600 work station and have not been able to determine what the max size SATA hard drive I can install in the system. The operating system is Windows 7 Professional 64-bit.
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Hi:
You may also want to post your question on the HP Business Support Forum -- z Workstations section.
http://h30499.www3.hp.com/t5/Workstations-z-series-xw-series/bd-p/bsc-272#.VDPx1XktC9I

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Oops, sorry about the spelling. Frustration can do that to you.

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My Core Duo Mac Mini is now driving the fan at max speed after an upgrade of the DVD drive (to an Optiarc AD-7630A). I've tried a PMU reset (though I'm not convinced it worked as the clock was still correct and I thought that a PMU reset also set the PRAM and therefore the clock: it does on my PowerBook). A temperature monitor app tells me that the various CPU temperatures are between 30 and 40 Celcius. Until now, I've never heard the fan come on so hard: not even when encoding video and generally thrashing the CPU. All very annoying for a machine that serves my TV!

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No spinning hard drive will transfer data faster then 60-80MB a second. The XT models have a flash storage area that is used when reading and writing data that can make it Appear faster in some situations. That flash memory if only 8 or 16GBs in side, I forget which one.
The drie is rated to work on 6GB SATA bus but it certainly can not transfer data that fast. It should be backword compatible to work on slower buses.
Your drive is 750GBs in size. Not wure where you are getting this 5.5TB (that is 5.5 Tera Bytes which is 5500 Giga Bytes. Your drive is under 1TB)
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You need to install on your old drive, Update it from the Apple Website then clone it to the new drive. The version of OSX you are using may not function correctly with that large of a drive. Or get yourself a copy of Snow Leopard, retail disk for $29 from Apple, and do all the partitioning and installing with that version od OSX.

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To clarify, this all happened under Snow Leopard as I had said. My profile lists Tiger, since I haven't cared to update my personal profile since using that OS, and in fact I still use Tiger among other versions. I manage a lot of users. And I never got to upgrade to Mountain Lion on this system, as explained in the post above. So I don't see the confusion.
I don't think the model of Mac makes a difference for this type of problem, but in case it does, the incident was on a 2010 Intel iMac with a 4TB hard drive and 8GB of RAM. I would have mentioned that if this was a problem with hardware specific to the model of Mac. But this is more of a universal issue.
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PowerMac G5 early2005 Max Total hard drive Gb = ???

Is it possible to install more than 1 Tb of hard drive into a PowerMac G5 , early 2005, dual 2 gHz. Right now the information I have says that I can only install two 500 Gb drives. I don't know if I can install a one 1 Tb drive or install two 1 Tb drives in each bay.
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Max No. of Drives in a Raid0 stripe ?

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