Expanding the drives into a raid 5 array?

I am going to purchase a powermac soon, but I want to understand raid arrays a bit better. I am an HD video editor, and am getting into large files sizes...Red, XDCam, 2K etc. I can buy any 4TB raid array with a card, or I read that I can add 3 extra 1TB hard drives inside the mac pro and stripe them raid 5? I know 3 drives aren't the best for redundancy, but will it work? Will I also need Apple's raid controller for this.
As a side not, someone said use all 4 drives as an array, but the OS has to operate on its own drive unless there is something I don't know.
Any ideas are appreciated.

I know 3 drives aren't the best for redundancy, but will it work?
Hi,
If you are thinking of using the 2009 Mac Pro internal hard disk sleds to create a RAID 5 you would need a $699 Mac Pro RAID Card. http://store.apple.com/us/product/MA849Z/B
Three HDs can be used in a RAID 5, but as one disk is used for parity data this only leaves you with the volume size of two HDs and performance = to two hard disks in RAID 0. This is not an option I would select. The other downside to this configuration is the Mac Pro RAID Card does NOT support Boot Camp.
RR 2314 & SeriTek/5PM
If you want RAID 5, Boot Camp and the ability to use the internal bays for a Mac OS X system an external RAID 5 is a good choice. The HighPoint RR 2314 and the SeriTek/5PM provide a nice solution at a reasonable price.
http://www.amug.org/amug-web/html/amug/reviews/articles/highpoint/2314/
http://www.amug.org/amug-web/html/amug/reviews/articles/firmtek/5pm/
As the SeriTek/5PM only requires one port on the RR 2314, users can expand to up to 20 hard disks using four enclosures. Even a single 5-bay, RAID 5 can support a 4TB volume using inexpensive 1TB hard disks. Larger hard disks are also supported. This option provides more hard disk mounting options and costs about the same as the Apple RAID 5 card.
RocketRAID 4322 & Proavio EB8MS
Another option is the HighPoint RR 4322. The controller supports RAID levels 0, 1, 3, 5, 6, 10, 50, hot spare and JBOD configurations. While more expensive, the RocketRAID 4322 adds RAID 6, SAS compatibility and supports an 8-bay enclosure like the Proavio EB8MS.
http://www.amug.org/amug-web/html/amug/reviews/articles/highpoint/4322/
http://www.proavio.com/eb8ms.html
RocketRAID 4322 & Enhance UltraStor RS16 JS
Another amazing performance option is the RR 4322 matched with the Enhance UltraStor RS16 JS. This 16-bay configuration provides high performance and supports large volume sizes. When AMUG tested this configuration with 16 Samsung 1TB hard disks in RAID 6 mode the volume size was 11.8TB and the average write performance across the volume was 696MB/sec. while the average read performance was 833MB/sec.
http://www.amug.org/amug-web/html/amug/reviews/articles/highpoint/4322/
http://www.amug.org/members/reviews/articles/enhance/rs16js/
Have fun!

Similar Messages

I worked with files in LR that were originally on my C drive, then were moved to an external HD for storage. I now want to do some more work on those files (which have the same file name as on the C drive). I plugged the drive into my computer and it show

I worked with files in LR that were originally on my C drive, then were moved to an external HD for storage. I now want to do some more work on those files (which have the same file name as on the C drive). I plugged the drive into my computer and it shows in LR under folders as the F drive and the little green light is on, but LR is showing only the first 6 files and not the remaining 200 or so. How do I expand the F folder to expose all files?

I worked with files in LR that were originally on my C drive, then were moved to an external HD for storage. I now want to do some more work on those files (which have the same file name as on the C drive). I plugged the drive into my computer and it shows in LR under folders as the F drive and the little green light is on, but LR is showing only the first 6 files and not the remaining 200 or so. How do I expand the F folder to expose all files?

If i have Time Machine backed up on an external hard drive, do i just plug the drive into another macbook pro and all my stuff is in the new computer? also, does it matter if the new computer is running Lion when the backed up info came from Snow Leopard

If i have Time Machine backed up on an external hard drive, do i just plug the drive into another macbook pro and all my stuff is in the new computer? Also, does it matter if the new computer is running Lion when the backed up info came from Snow Leopard 10.6.8?

No and Yes
Don't use TM for this purpose, clone your drive to an external, plug the external into another MBP and reboot from it. Please note that booting a machine that came with Lion may not be possible from a drive with Snow Leopard.

I wish to migrate the software of my operating system into my raid disk array

I have not found anything
from Intel
orMicrosoft software to migrate my operating system and I was told that there were a couple other companies to
software to move my O.S. off the solid-state drive that it's on and put it on my RAID 5 array that's installed in my computer and working could you please give me a little adviceI have
software for conventional migration and will not work for this application.

Something here may help.
http://www.techrepublic.com/blog/data-center/how-to-restore-a-system-image-in-windows-server-2012/
Regards, Dave Patrick ....
Microsoft Certified Professional
Microsoft MVP [Windows]
Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.

Video FX: video effects and editing drive (incl. RAID disk arrays)

Having had an issue with rendering iMovie effects and read through a few posted thread, I ran an experiment that pinpoints an incompatibility between iMovie and large size (800GB) RAID array volumes. Hence the following questions:
Is iMovie designed to support large sire RAID disk arrays ?
Could anybody test a non-RAID array large size (say 500GB or better 1000GB) volume to check if it is size or RAID dependent ?
When can we expect a fix ?
For more details, please read on.
Reading through the other threads talking about the Quartz composer effects, it sounds like the Apple programmers have a lot of work ahead to deliver a more robust 6.0.2 version.
I wanted to record the noticed incompatibility of working with a project outside the System & Application drive and applying Quartz composer effects.
Most keen videographers are using either a good large size external drive, a RAID array or a separate partition to store their video footage and editing work. So the noticed incompatibility needs to be looked into.
Interestingly, I read of other users having the same problem but Karl Petersen also mentionned that he didn't have the problem ...
So, what's wrong ? If the problem would be consistent, it would be easy to have Apple on their toes to fix it, but if not ...
So I ran a small experiment. I took the same iMovie project and copied it to my different disks and volumes (at least the ones where I had enough space) and tested 3 types of effects:
-1- the non-Quartz Composer 'fast/slow/reverse' effect, which caused me trouble already in iMovie '05;
-2- the Quartz Composer 'sepia tone' effect, which I was using without problem in the previous version;
-3- the non-Quartz Composer 'aged film' effect, which I was using without problem in the previous version;
My disk and volume configuration is the following:
-> First internal 500GB Serial ATA Disk split into 3 partitions:
a) 30GB System & Applications Drive (Start-up Disk);
b) 20GB Pictures Drive;
c) 415.6GB Partition as Slice 1 of my Apple RAID array;
-> Second internal 500GB Serial ATA Disk split into 4 partitions:
d) 15GB Virtual PC System & Applications Drive;
e) 15GB MAC & PC Documents Drive;
f) 20GB Musics Drive;
g) 415.6GB Partition as Slice 2 of my Apple RAID array;
-> Internal 831.3GB Apple RAID Array - striped RAID set made of 2 slices (volumes c and g above);
-> External 120GB FireWire Disk in one volume.
All volumes are formated using Mac OS Extended (Journaled) format.
The result is consistent and points towards an incompatibility of iMovie with either very large size volume or RAID array. Indeed, all tested effects preview fine on all tested volumes, however, they can be applied seemlessly on all tested volumes apart for my large size RAID array.
When the project is on the RAID array, hitting the apply button results in the following:
For the non-Quartz Composer 'fast/slow/reverse' effect and the Quartz Composer 'sepia tone' effect, rendering starts but then stops a fraction of a second later (as if it was unable to write the rendered file to disk). Resulting image in the video viewer is shifted diagonally to leave a black corner on the bottom-left.
For the non-Quartz Composer 'aged film' effect, rendering starts and proceeds but the resulting image in the video viewer is again shifted diagonally to leave a black corner on the bottom-left. Note that resizing the iMovie window corrects this viewer issue.
Conclusion:
Is iMovie designed to support large sire RAID disk arrays ?
Could anybody test a non-RAID array large size (say 500GB or better 1000GB) volume to check if it is size or RAID dependent ?
When can we expect a fix ?
Regards,
Alex

I had the same problem rendering a movie with iMovie 6 when the file is placed on a second internal disk.
Clicking the 'Ignore ownership on this volume' tick box is a solution but I find it too blunt. My Mac is configured as a multiuser system and I bought the second internal disk to use it for my /Users directory. I thus don't want the different users to be able to create files in each others directories.
When unclicking the 'Ignore ownership on this volume' tick box again I'm surprised to find that rendering still works fine for all users with the desired file integrity.
I would have preferred to set up all the permissions using unix commands instead of all this magic. Can anyone explain the proper way to configure the correct permissions using the Terminal?
Power Mac G5 DP 1.8GHz Mac OS X (10.4.5)

Quicktime disables one of the disks in my RAID 5 array.

Hi,
I have just installed ver 7.2 of Quicktime and after I began playing a Quicktime movie file one of the disks on my RAID array came up as failed. I have managed to recover this problem, but is there anything I can do to stop this happening again???... (apart from going back to XP )
Cheers,
Mark.

I just had the same problem. This is the second time I'm having this issue, the first time was when I installed Quicktime the first time a couple months ago, I don't remember which version it was (cannot remember if it was during the installation of the first file I played). I lost one of my drive in my RAID 0 or 1 (mirroring), fortunately I was able to rebuilt the image.
The second was few minutes ago when I was trying to play the HD trailer of Rush Hour 3. But this time my computer could reboot, my 2 drives was marked as failed!!! I was really scared to lose my data. Fortunately when I went in the RAID controller setup, it was able to find one of my drive and now the second one is rebuilding. The first thing I did when I rebooted was to uninstall that crap of quicktime and will never install it again.
My config: Vista Ultimate 64, motherboard Asus P5B Deluxe with Intel Matrix Storage. Quicktime 7.2 updated few days ago.

Inserted my Mac Pro hard drives into a RAID enclosure accidentally... help!

Hi guys,
I am regular member of the Logic Pro forum, but am hoping for some help regarding a fairly large data loss disaster.
I have recently sold my Mac Pro tower, in favour of a new iMac, and prior to selling I removed my two additional audio hard drives from the Mac Pro. Unfortunately these were only backed up a year ago (and now my slackness has come back to bite me!), and since then a fair bit of audio work has been completed in Logic Pro.
My plan was to access the hard drives' content on my iMac using a dual-HD USB3 hard drive enclosure. I purchased the ORICO 3529 NAS series, which, while having RAID functionality, I also understood could be used simply as a dual drive unit for normal access of two drives.
So when I got the ORICO unit, I put my two audio drives into it, and plugged into the iMac. I expected to see my drives, but instead I got the message "The disk you inserted was not readable by this computer". I had switched the ORICO to JBOD mode, but possibly not prior to initially powering up the unit - which it appears defaults to RAID mode.
I have since tried the HDs in another single enclosure, as well as putting them in a friend's Mac Pro, and in both cases each disk brings up the same error.
It appears I have somehow formatted these drives to be part of a RAID setup, just by putting them in the RAID unit. I am not sure whether this means that all my data is lost, or whether instead it means that the directory or some other part of the file structure or format have been damaged and need to be re-built. While I am a competent computer user in a music context (using Pro Tools and Logic Pro), I am by no means a programmer, and am not really sure where to go from here.
Two of the very helpful regulars on the Logic Pro forum have advised me that potentially a tool like DiskWarrior might help recover the data, although as we went through some additional troubleshooting, they have since suggested that DiskWarrior may not be the solution, and instead I should talk to a RAID specialist about how to recover some of the data on these disks.
So on that note I thought I would put it out here for any Mac users who might be experienced with RAID and willing to make any recommendations. In the meantime I am not going to try to use any tools (like DiskWarrior) in case they cause more harm when in fact I should be seeking out a RAID expert to work on the solution with me.
If you have any thoughts or have had an experience similar (if you are as silly as me!), I would be grateful for any suggestions you might be able to offer.
Cheers and thanks!
Mike

Also, first thing is don't touch change or modify. Disconnect and get them off line.
The first program that can probably help, http://www.SoftRAID.com - their demo (the support they give is probably worth the cost too). Alsoft Disk Warrior support - even remote login - also can be excellent if or when needed.
SoftRAID 'takes over" the Apple RAID and can do wonders.
What you have is an external device with its own built-in bridge and probably a switch (mirror, stripe, JBOD, None).
You need to get them in a case that has no built in bridge or RAID of its own. A Mac Pro would be excellent.
See what OWC has in external cases. http://www.macsales.com/firewire ( a good place to start looking at any type of external interface for storage)

Both drives failed in RAID 1 array. How do I recover from this?

So I have a large problem on my hands; my RAID 1 array has 2 disks which have both failed. One disk failed at a time with a span of about a month between the 2 failures. Since I hear no clicking noises from the disks and I can still see both of them when I do a "diskutil list", I'm guessing the disk electronics are good as well, so I should be able to work with the disks. Here's the output from "diskutil checkRaid" :
Name: USB RAID Set 1
Unique ID: AD191DE5-49CB-4BEE-9362-D98B690DAC3A
Type: Mirror
Status: Offline
Device Node: disk2
Apple RAID Version: 2
# Device Node UUID Status
0 disk1s3 5D09E4DE-E0E9-4518-8672-F247F5CE0CBB Failed
1 disk3s3 431B65E0-DF51-4045-8C1E-CCB69E95916D Failed
Here's what I'd like to do: Although I have a good idea of which of the 2 disks has the most recent data on it, I'd like to be able to mount disk1s3 and disk3s3 independently and compare which has more data on it. Then, I'm going to plug in another USB hard disk and copy the data from the failed raid disk with the greatest disk utilization over to the USB disk I plugged in. At that point I'll trash the RAID 1 array and start over again. Of course I have no backup of my data, so just recovering isn't an option (my genius thinking was, "Ahh who needs backups, I'm using RAID!" Hah.. good one).
I tried doing the following to mount the slices: # diskutil mount disk1s3 and # diskutil mount disk1s3 force. Neither of which mount the disk. I've also tried specifying a mount point and that doesn't work either. All commands come back with "Volume disk1s3 mounted" but if I type "mount", I don't see it mounted anywhere. dmesg and /var/log/system.log don't give me anything useful about why the slices don't mount... the only thing I see from dmesg are the errors which started this mess:
HFS resolvelink: can't find iNode6487433
USBF: 107524. 33 AppleUSBEHCI[0x27c4800]::DoControlTransfer sync request on workloop thread. Use async!
AppleRAID::recover() member 5D09E4DE-E0E9-4518-8672-F247F5CE0CBB from set "USB RAID Set 1" (AD191DE5-49CB-4BEE-9362-D98B690DAC3A) has been marked offline.
AppleRAID::restartSet - restarting set "USB RAID Set 1" (AD191DE5-49CB-4BEE-9362-D98B690DAC3A).
disk2: media is not present.
HFS: err 6 reading VH blk (RAID 1)
jnl: flushing fs disk buffer returned 0x6
disk2: media is not present.
jnl: dojnlio: strategy err 0x6
jnl: writejournalheader: error writing the journal header!
AppleRAID::restartSet - restarting set "USB RAID Set 1" (AD191DE5-49CB-4BEE-9362-D98B690DAC3A).
AppleRAIDSet::addMember() detected expired sequenceNumber (12) for member 5D09E4DE-E0E9-4518-8672-F247F5CE0CBB
Also here's a diskutil list in case that's useful to anyone:
# diskutil list
/dev/disk0
#: type name size identifier
0: Applepartitionscheme *74.5 GB disk0
1: Applepartitionmap 31.5 KB disk0s1
2: Apple_HFS Macintosh HD 74.4 GB disk0s3
/dev/disk1
#: type name size identifier
0: Applepartitionscheme *931.5 GB disk1
1: Applepartitionmap 31.5 KB disk1s1
2: Apple_Boot 128.0 MB disk1s2
3: Apple_RAID 931.4 GB disk1s3
/dev/disk2
#: type name size identifier
0: Apple_HFS *931.4 GB disk2
/dev/disk3
#: type name size identifier
0: Applepartitionscheme *931.5 GB disk3
1: Applepartitionmap 31.5 KB disk3s1
2: Apple_Boot 128.0 MB disk3s2
3: Apple_RAID 931.4 GB disk3s3
/dev/disk4
#: type name size identifier
0: Applepartitionscheme *647.5 MB disk4
1: Applepartitionmap 31.5 KB disk4s1
2: Apple_HFS DiskWarriorCD 647.4 MB disk4s2
So, does anyone know how I can mount the slices independently so that I can grab the data off the useful slice?

Ok figured this one out myself. So the file system types that the FS is labeled with isn't known by the standard mount program, but really under the covers apple's software raid slice is just a HFS partition. Fantastic.
1) So first you figure out what slice you want to mount, in my case /dev/disk1s3 (oh ya, unlike the diskutil command, you need to actually specify the full path to the device so you need the /dev in there)
2) Create a mount point to mount the slice to "mkdir /Volumes/disk1s3" for example
3) Mount it up! "mount -t hfs /dev/disk1s3 /Volumes/disk1s3"
4) If you're interested in actually using the GUI to view the files, you can place an alias on your desktop by doing a "ln -s /Volumes/disk1s3 /Users/<putyour_user_namehere>/Desktop/disk1s3 "
This probably only works for a RAID 1 or maybe even a RAID 1+0 but in any case it allowed me to pull my data off so that I could back the data up and re-create the RAID 1 setup. You should only be doing this if both your drives get marked as failed, otherwise it's way easier to just use the disk utility to repair the array.

How I can transfer data from the database into a variable (or array)?

I made my application according to the example (http://corlan.org/2009/06/12/working-in-flash-builder-4-with-flex-and-php/). Everything works fine. I changed one function to query the database - add the two parameters and get the value of the table in String format. A test operation shows that all is ok. If I want to display this value in the text area, I simply drag and drop service to this element in the design mode
(<s:TextArea x="153" y="435" id="nameText" text="{getDataMeanResult.lastResult[0].name}" width="296" height="89" />).
It also works fine, just a warning and encouraged to use ArrayCollection.getItemAt().
Now I want to send the value to a variable or array, but in both cases I get an error: TypeError: Error #1010: A term is undefined and has no properties..
How can I pass a value from the database into a variable? Thank you.
public var nameTemp:String;
getDataMeanResult.token = authors.getDataMean(arrayOfNumber[0], dir_id);
nameTemp = getDataMeanResult.lastResult[0].name;
public var nameArray:Array = new Array();
for (var i:uint=o; i<3; i++){
getDataMeanResult.token = authors.getDataMean(arrayOfNumber[i], dir_id);
nameArray[i] = getDataMeanResult.lastResult[0].name;
And how i can use syntax highlighting in this forum?

Astraport2012 wrote:
I have to go back to the discussion. The above example works fine when i want to get a single value of the database. But i need to pass an array and get an array, because i want to get at once all the values for all pictures tooltips. I rewrote the proposed Matt PHP-script and it works. However, i can not display the resulting array.
yep, it won't work for Arrays, you'll have to do something slightly more intelligent for them.
easiest way would be to get your PHP to generate XML, then read that into something like an ArrayList on your HTTPService result event (depends what you're doing with it).
for example, you could have the PHP generate XML such as:
<pictures>
     <location>test1.png</location>
     <location>test2.png</location>
     <location>test3.png</location>
     <location>test4.png</location>
     <location>test5.png</location>
     <location>test6.png</location>
</pictures>
then you'll read that in as the ResultEvent, and perform something like this on it
private var tempAC:ArrayList = new ArrayList
protected function getStuff_resultHandler(event:ResultEvent):void
    for each(var item:Object in event.result.pictures)
       var temp:String = (item.@location).toString();
       tempAC.addItem(temp);
in my example on cookies
http://www.mattlefevre.com/viewExample.php?tut=flash4PHP&proj=Using%20Cookies
you'll see an example of how to format an XML structure containing multiple values:
if($_COOKIE["firstName"])
        print "<stored>true</stored>";
        print "<userInfo>
                <firstName>".$_COOKIE["firstName"]."</firstName>
                <lastName>".$_COOKIE["lastName"]."</lastName>
                <userAge>".$_COOKIE["userAge"]."</userAge>
                <gender>".$_COOKIE["gender"]."</gender>
               </userInfo>";
    else
        print "<stored>false</stored>";
which i handle like so
if(event.result.stored == true)
                    entryPanel.title = "Welcome back " + event.result.userInfo.firstName + " " + event.result.userInfo.lastName;
                    firstName.text = event.result.userInfo.firstName;
                    lastName.text = event.result.userInfo.lastName;
                    userAge.value = event.result.userInfo.userAge;
                    userGender.selectedIndex = event.result.userInfo.gender;
depends on what type of Array you're after
from the sounds of it (with the mention of picture tooltips) you're trying to create a gallery with an image, and a tooltip.
so i'd probably adopt something like
<picture>
     <location>example1.png</location>
     <tooltip>tooltip for picture #1</tooltip>
</picture>
<picture>
     <location>example2.png</location>
     <tooltip>tooltip for picture #2</tooltip>
</picture>
<picture>
     <location>example3.png</location>
     <tooltip>tooltip for picture #3</tooltip>
</picture>
etc...
or
<picture location="example1.png" tooltip="tooltip for picture #1"/>
<picture location="example2.png" tooltip="tooltip for picture #2"/>
<picture location="example3.png" tooltip="tooltip for picture #3"/>
etc...

Win2k Server can't see the drives on Compaq VA7400 Disk Array

I have attached a Win2K server with (10/100MB) NIC to Cat 29478G, then connect the Gigabit Ethernet port to the SN5428. The VA7400 is connected to fc2 on SN5428. I can see all the drives on VA7400 in the SN5428 web admin page. The iscsi driver (v2.2.1) is installed and the status is ok.
However, I couldn't scan the disk from win2k disk manager unless I install the Veritas Volume Manager 3.0
Is it VxVM is a must for Cisco;s iSCSI solution?

Thanks mrfrase.
I am now facing another problem. I have attached all my devices together
I can see my iscsi status is active to the scsi routing instance.
I can see my array is presented in the SN5428 by "sh devices"
i can see my iscsi routing is active in the router
I can ping my server with iscsi driver installed
but the Cisco Psuedo SCSI drive is still not running!!!
(In Windows Control Panel->System->Hardware Configuration)
What is the problem?

How to change the image into byte and byte array into image

now i am developing one project. i want change the image into byte array and then byte array into image.

FileInputStream is = new FileInputStream(file);
byte[] result = IOUtils.toByteArray(is);
with apache common IO lib

Migrating a Single 250GB Drive to 2TB RAID 5 Array

My Mac Pro has the original 250GB hard drive it came with. I just purchased a Mac Pro RAID Card. My intention is to install 2 1TB drives, and create a RAID 5 with the three drives. Obviously the new set will only use 250GB on each of the 2 new 1TB drives. Once the array is fully built out, I plan on removing the 250GB drive, and have the array rebuild on the 3rd 1TB drive. This should leave me at the same place i was with the 250GB drive installed.
What I am wondering is that will the RAID utility now see extra space on all three drives, and subsequently allow me to create an additional RAID 5 set with the available space? I'm doing this in lieu of cloning the 250GB to a 1TB drive, boot from the 1TB drive, and then migrating a single boot volume to a RAID set.
Any ideas is appreciated. Thanks.

A thread that looked into RAID5.
http://discussions.apple.com/thread.jspa?threadID=1070319&tstart=0
A good start, AMUG review of the Mac Pro 2008.
http://www.amug.org/amug-web/html/amug/reviews/articles/intel/macpro-2008/
NewerTech to use ODD SATA ports to attach your OEM and one other drive. Free up your four internal drive bays.
http://eshop.macsales.com/item/Newer%20Technology/MPQXES2/
Alternative to Apple Pro RAID - HighPoint RocketRAID 3522
Barefeats: RAID 3 vs RAID 5 vs RAID 6
http://www.barefeats.com/hard101.html
AMUG Review HighPoint RocketRAID 3522
http://www.amug.org/amug-web/html/amug/reviews/articles/highpoint/3522/
4-drive RAID performance
http://www.barefeats.com/harper13.html
Estimating capacity:
http://docs.info.apple.com/article.html?artnum=306212
Personally, from using RAIDs, don't mix drives with different performance, platters, seek or firmware.

Configuring 2 SATA drives for an OS X RAID 1 array & also for OS 9.

Does anyone know if a configuration like this might work in a G4 AGP Graphics "Sawtooth"?
• A SATA controller card that supports RAID 1, such as one of the FirmTek SeriTek cards at the below links:
[http://eshop.macsales.com/item/Firmtek/SATA1V4>
[http://eshop.macsales.com/item/Firmtek/SATA1EVE22>
• Two 500 GB, 640 GB, or 1 TB SATA drives.
• Partitioning 200 GB of each drive for use by OS 9 when booting directly into it.
• Using the two drives in a RAID 1 array when booted into OS X.
• Not installing a 3rd-party RAID software utility for OS 9.
Specifically, does anyone know what would happen when one boots into OS 9? Would the two drives simply be seen as two separate 200 GB partitions?

Hi-
Would the two drives simply be seen as two separate 200 GB partitions?
That is how it should work.
Go one better, and find SoftRAID 2.2 and RAID the 2 200 GB partitions for use in OS 9.

Xserve SSD OS drive Raid 5 array - What if SSD OS drive is corrupt or fails

Xserve SSD OS Drive option with Raid 5 array - What if SSD OS drive fails or the OS becomes corrupted? Could you just re install the os and then upload all of your server settings and it would be able to talk to the raid array and be good to go?
Additionally if the os is in the raid 5 and becomes corrupted and you are not able to get the os to boot would the raid 5 data not be able to be accessed? Or could you just reinstall the os on the array and be ok?
This would be the same if the os is inside a software mirror set?
Thanks in advance!!!

Hi
If you're asking can OSX Server be reinstalled without a reformat the answer would be no. This assumes you're using the OSX Server Installer DVD. Assuming no other hardware issues you should be able to access any/all data on any of the Drives using Target Disk Mode and another mac. This will at least allow a transfer of important data to another source. Having said that you should be keeping back-ups anyway.
You can export Server Admin's configuration as a series of property lists. You can export Users, Groups and Computer Lists from WorkGroup Manager. You can archive the whole of the LDAP database - which will contain everything except home folder information - using Server Admin.
I'm not sure if this is still the case but one of Apple's Best Practice tips was to setup and configure the Server exactly as you wanted it first. Once you're happy use any one of probably half a dozen methods to make a Bootable cloned backup. A free built-in method would be to boot from an appropriate Installer Disk and save the Server OS as a .dmg to a connected USB or Firewire disk. Or use something like CarbonCopyCloner to do regular scheduled clones to an externally attached drive.
My 2p.
Tony

RAID 5 array on PERC6/i offline

Ok, so we have a 2970 with a PERC6/i. 5 drives in a RAID 5 array, and one hot spare. I apparently lost two drives today, one to a failure, and one began showing as a foreign config. I cleared the foreign config and replaced the drive, but now on my array, I'm showing 3 drives and 2 slots marked "Missing". How can I bring this array back online and good to go without deleting and creating a new VD? Thanks in advance...

IMPORT
ONLY used when an array is OFFLINE (non-functional/failed). If you have a 3-disk RAID 5 and two disks are foreign (or one foreign and one failed or missing), the RAID 5 is dead/offline. You must import in this case. If you replace a failed/foreign drive with a new one, and the new one is flagged as foreign and you import, you will corrupt your data.
CLEAR
ONLY used when an array is ONLINE (up and running, functional). If you have a 3-disk RAID 5 and one disk is showing foreign (meaning that disk is also offline), you must CLEAR it (whether it is a replacement disk or an original), then assign it as a hot-spare.
Typically once you clear the foreign configuration, you do not get a second chance - the drive is then in a Ready state.

Expanding the drives into a raid 5 array?

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