Setting up a software Mirror

To all that may provide insight.
I ordered a MBP and need to transfer some data to an external before it arrives. I want to mirror two firewire 400 externals, on the new MBP, when it arrives.
I want to copy the data (250 mb) over to the existing external before the MBP arrives (because it takes a long time & I need to get it off of my old MacPro). Then I want to plug it up to the new MBP (when it arrives) and daisy chain a second external. After connecting the second external, will I be able to create a mirror of the 1st external (while it currently has information on it)? Or will Disk Utility need to erase the drives to configure the mirror?
Thanks in advance,
-Grant

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I have some questions regarding setting up a software RAID 0 on a Mac Pro

I have some questions regarding setting up a software RAID 0 on a Mac pro (early 2009).
These questions might seem stupid to many of you, but, as my last, in fact my one and only, computer before the Mac Pro was a IICX/4/80 running System 7.5, I am a complete novice regarding this particular matter.
A few days ago I installed a WD3000HLFS VelociRaptor 300GB in bay 1, and moved the original 640GB HD to bay 2. I now have 2 bootable internal drives, and currently I am using the VR300 as my startup disk. Instead of cloning from the original drive, I have reinstalled the Mac OS, and all my applications & software onto the VR300. Everything is backed up onto a WD SE II 2TB external drive, using Time Machine. The original 640GB has an eDrive partition, which was created some time ago using TechTool Pro 5.
The system will be used primarily for photo editing, digital imaging, and to produce colour prints up to A2 size. Some of the image files, from scanned imports of film negatives & transparencies, will be 40MB or larger. Next year I hope to buy a high resolution full frame digital SLR, which will also generate large files.
Currently I am using Apple's bundled iPhoto, Aperture 2, Photoshop Elements 8, Silverfast Ai, ColorMunki Photo, EZcolor and other applications/software. I will also be using Photoshop CS5, when it becomes available, and I will probably change over to Lightroom 3, which is currently in Beta, because I have had problems with Aperture, which, until recent upgrades (HD, RAM & graphics card) to my system, would not even load images for print. All I had was a blank preview page, and a constant, frozen "loading" message - the symbol underneath remained static, instead of revolving!
It is now possible to print images from within Aperture 2, but I am not happy with the colour fidelity, whereas it is possible to produce excellent, natural colour prints using its "minnow" sibling, iPhoto!
My intention is to buy another 3 VR300s to form a 4 drive Raid 0 array for optimum performance, and to store the original 640GB drive as an emergency bootable back-up. I would have ordered the additional VR300s already, but for the fact that there appears to have been a run on them, and currently they are out of stock at all, but the more expensive, UK resellers.
I should be most grateful to receive advice regarding the following questions:
QUESTION 1:
I have had a look at the RAID setting up facility in Disk Utility and it states: "To create a RAID set, drag disks or partitions into the list below".
If I install another 3 VR300s, can I drag all 4 of them into the "list below" box, without any risk of losing everything I have already installed on the existing VR300?
Or would I have to reinstall the OS, applications and software again?
I mention this, because one of the applications, Personal accountz, has a label on its CD wallet stating that the Licence Key can only be used once, and I have already used it when I installed it on the existing VR300.
QUESTION 2:
I understand that the failure of just one drive will result in all the data in a Raid 0 array being lost.
Does this mean that I would not be able to boot up from the 4 drive array in that scenario?
Even so, it would be worth the risk to gain the optimum performance provide by Raid 0 over the other RAID setup options, and, in addition to the SE II, I will probably back up all my image files onto a portable drive as an additional precaution.
QUESTION 3:
Is it possible to create an eDrive partition, using TechTool Pro 5, on the VR300 in bay !?
Or would this not be of any use anyway, in the event of a single drive failure?
QUESTION 4:
Would there be a significant increase in performance using a 4 x VR300 drive RAID 0 array, compared to only 2 or 3 drives?
QUESTION 5:
If I used a 3 x VR300 RAID 0 array, and installed either a cloned VR300 or the original 640GB HD in bay 4, and I left the Startup Disk in System Preferences unlocked, would the system boot up automatically from the 4th. drive in the event of a single drive failure in the 3 drive RAID 0 array which had been selected for startup?
Apologies if these seem stupid questions, but I am trying to determine the best option without foregoing optimum performance.

Well said.
Steps to set up RAID
Setting up a RAID array in Mac OS X is part of the installation process. This procedure assumes that you have already installed Mac OS 10.1 and the hard drive subsystem (two hard drives and a PCI controller card, for example) that RAID will be implemented on. Follow these steps:
1. Open Disk Utility (/Applications/Utilities).
2. When the disks appear in the pane on the left, select the disks you wish to be in the array and drag them to the disk panel.
3. Choose Stripe or Mirror from the RAID Scheme pop-up menu.
4. Name the RAID set.
5. Choose a volume format. The size of the array will be automatically determined based on what you selected.
6. Click Create.
Recovering from a hard drive failure on a mirrored array
1. Open Disk Utility in (/Applications/Utilities).
2. Click the RAID tab. If an issue has occurred, a dialog box will appear that describes it.
3. If an issue with the disk is indicated, click Rebuild.
4. If Rebuild does not work, shut down the computer and replace the damaged hard disk.
5. Repeat steps 1 and 2.
6. Drag the icon of the new disk on top of that of the removed disk.
7. Click Rebuild.
http://support.apple.com/kb/HT2559
Drive A + B = VOLUME ONE
Drive C + D = VOLUME TWO
What you put on those volumes is of course up to you and easy to do.
A system really only needs to be backed up "as needed" like before you add or update or install anything.
/Users can be backed up hourly, daily, weekly schedule
Media files as needed.
Things that hurt performance:
Page outs
Spotlight - disable this for boot drive and 'scratch'
SCRATCH: Temporary space; erased between projects and steps.
http://en.wikipedia.org/wiki/StandardRAIDlevels
(normally I'd link to Wikipedia but I can't load right now)
Disk drives are the slowest component, so tackling that has always made sense. Easy way to make a difference. More RAM only if it will be of value and used. Same with more/faster processors, or graphic card.
To help understand and configure your 2009 Nehalem Mac Pro:
http://arstechnica.com/apple/reviews/2009/04/266ghz-8-core-mac-pro-review.ars/1
http://macperformanceguide.com/
http://www.macgurus.com/guides/storageaccelguide.php
http://www.macintouch.com/readerreports/harddrives/index.html
http://macperformanceguide.com/OptimizingPhotoshop-Configuration.html
http://kb2.adobe.com/cps/404/kb404440.html

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Hello a2fay,
I see that this is your first visit to the HP Forums. Let me please take a moment to say "Welcome".
To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I see that you are having some issue with installing the printer on to your computer. So I can better assist you, what is the operating system you are using on your computer.
Which Windows Operating System am I running?
One step that you can try is to run the HP Printer Install Wizard for Windows.
If you do not have time today to write me back, I hope you have a great Thursday.
Cheers,
Click the “Kudos Thumbs Up" at the bottom of this post to say “Thanks” for helping!
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
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Hey Folks,
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The other two drives in the system I am using for a database, and so, will configure software raid on them. However, I've done the following:
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metainit -f d30 1 1 /dev/dsk/c1t3d0s0
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Run fsck manually (fsck filesystem...).
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Jun 27 08:18:30 svc.startd[7]: svc:/system/filesystem/local:default: Method "/lib/svc/method/fs-local" failed with exit status 95.
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Hi!
I have found these two errors too.
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#to mount to fsck point type pass at boot options
fd - /dev/fd      fd      -      no -
/proc - /proc      proc      -      no -
/dev/md/dsk/d2 -      -      swap - no -
/dev/md/dsk/d1 /dev/md/rdsk/d1 /      ufs 1 no -
/dev/md/dsk/d4 /dev/md/rdsk/d4 /etc/opt/OV ufs 2     yes -
/dev/md/dsk/d5 /dev/md/rdsk/d5 /opt/OV      ufs 2 yes     -
/dev/md/dsk/d3 /dev/md/rdsk/d3 /var/opt/OV ufs 2     yes -
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Hope it helps,
Regards,
Thais

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Dear readers
I did setup a Mac Mini Server the following way.
Disk Utility stared from the System DVD.
- Delete both internal drives
- Create a mirror inside disk utility
- Make two partitions on this newly created drive
- Installed the system
- Configured it after update
So far every thing works fine.
My question is now,
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Kind regards from Switzerland
Thomas

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Hi Guys,
I've successfully mirrored 4 slices from the original disk
to the second one in our v240, the raid as such works,
and is consistent. I then did the following:
<div class="pre"><pre>installboot /usr/platform/`uname -i`/lib/fs/ufs/bootblk /dev/rdsk/c1t1d0s0init 0devalias disk_mirror /pci@1c,600000/scsi@2/sd@1,0:aboot disk_mirror</pre></div>
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Andrej

<table border="0" align="center" width="90%" cellpadding="3" cellspacing="1"><tr><td class="SmallText"><b>m-lennon wrote on Fri, 02 December 2005 07:45</b></td></tr><tr><td class="quote">
Very amusing comment Michael!
</td></tr></table>
Actually I think he just didn't believe me when I said
that I have SUCCESSFULLY mirrored 4 slices (/, /var swap
and /adv). Yes, I did use metastat to check on the
process, and yes, after a couple of hours even the
largest slice (/adv) was successfully mirrored.
<table border="0" align="center" width="90%" cellpadding="3" cellspacing="1"><tr><td class="SmallText"><b>m-lennon wrote on Fri, 02 December 2005 07:45</b></td></tr><tr><td class="quote">
One of the things that can be confusing when moving from Linux on PC to Solaris on SPARC systems is the obp, far more robust than BIOS! I have found that this puts Linux administrators off using SPARC systems, but these systems aren't that complicated if you understand how to use them ( entry level systems at least ). A good place to start is http://docs.sun.com/ and BigAdmin. As Michael suggested the man pages are an excellent source for quick information. Any time I work on a Linux system I use the man pages all the time because the GNU commands can be different. In fact during exams like the RHCE you are allowed to use the man pages to help you answer the problems/questions. Can you tell us if you have followed a procedure or guide when you set up your root mirror?
</td></tr></table>
I followed the general outline as it was given to me
in the course SA-299 ...
<table border="0" align="center" width="90%" cellpadding="3" cellspacing="1"><tr><td class="SmallText"><b>m-lennon wrote on Fri, 02 December 2005 07:45</b></td></tr><tr><td class="quote">
Have you searched the forum for any references, I have posted to a thread outlining the steps to take to configure a root mirror some time ago:
http://supportforum.sun.com/hardware/index.php?t=msg&got o=17942&rid=3131&SQ=c7d34a55da48e884a4ea26ddaf162731
I think it is difficult to try and provide this information through the forum, as you can see in this thread it was far from straight forward! If you want to outline more about your current configuration, I can try to give you some pointers.
</td></tr></table>
The mirroring wasn't the problem. I suppose I didn't quite
understand Michaels question; I assumed that he wants me
to check if the files are present on the mirror, which is what
I have no clue how to do; as in looking at it as if it were a
stand-alone HDD.
However: The mirroring wasn't the problem, the attempt to
boot (to verify that I'll have a working system if disk 1 dies)
of the secondary side of the mirror was ...
Cheers,
Andrej

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