Mounting xserver raid

Folks,
We have a xserve raid box set up and connected via fibre channel to a xserve box. What steps we need to do to mount the drives? What's the osx equivalent to vfstab and what device names reference them?
Powermac G5

That's exactly what you need to do. At this point they could be UFS, HFS or whatever you want. You need to partition and format them to your liking. Once they are formatted they will mount automatically on boot.
If you have more than one connected computer (or you use a fibre switch) you can use fstab to control mounting at boot time as per Unix regular usage. I have never been able to get an authoritative answer on whether Disk Utility honors fstab. I have a feeling it doesn't - or can be forced to override those settings - but I have tried it to see. Next time I take the servers down for back-up or maintenance I'll try it and see. I have 500GB of my 6 disk RAID5 carved out for my webserver - the rest of the side and the other side are for the fileserver - and I control their mounting with fstab settings. But I've never tried to forcibly mount the webserver volume on the fileserver.
Don't worry - the formatting is faster than than the initialization.
Good luck,
=Tod
G5/2.0x2, Dual XServes x2, XRAID, beige G3 501Mhz

Similar Messages

Mounting Xserve Raid Volumes

I'm relatively new to Xserve RAID and I hope this isn't a topic that's already been covered.
If I unmount (or eject) a RAID volume, how do I re-mount it. Other than rebooting the system.
The RAID volumes don't appear in /etc/fstab. Where exactly does the system store the volume which are to be mounted at boot.
Thanks..
-- Bob

You might see the volumes in disk utility, and you can remount them from there.
Otherwise, you could unplug and re-plug the cable, and they'll show up, if you have physical access.

XServe Raid won't mount after drive replacement

We had a drive go bad on an XServe Raid. We replaced the drive. It went through the rebuilding process. Now we can't mount the raid. The verify in the disk utility is successful but it still won't mount. What are we missing?

I have managed to fix the problem (at least it's still going at the moment...). We were just about to return the Fiber Card to Apple, but just before I removed the card from the G5 I had one last look at the settings on the RAID. Previously I had noticed that LUN Masking was on. I didn't take much notice of this before, as I read in an Apple manual somewhere that LUN Masking is always on while the Xserve is initializing the disks. As a last resort I thought to try and force LUN Masking to be disabled. I changed the array to JBOD, so the disks wouldn't be initialized, and entered the advanced settings. I then went to the LUN Masking section and turned off masking for both controllers. I then shut down the Xserve and unplugged it for 10 minutes.
I then turned on the Xserve and the G5 and to my utter delight, the G5 said "Unrecognized disk inserted"! The G5 was finally seeing the RAID.
I then formatted the RAID and everything has been fine since (4-5 hours).
I have no idea how LUN Masking turned on, the masking list had no devices in it, so the RAID was basically disallowing anyone access through fiber. Upon turning masking off, the RAID reappeared on the G5. Apple support said nothing about LUN Masking when I on the phone to them. I guess they though resetting the RAID controllers would reset the LUN Masking, but it doesn't seem to. I repeat: Resetting the RAID controllers does not reset LUN Masking.
All along this was the problem, but no-one at Apple or the reseller we purchased the Xserve RAID from thought of it!
I hope this helps someone out there.
Elijah
PowerMac G5, PowerBook G4 Mac OS X (10.4.6) G5: 1.8Ghz 1Gb RAM Geforce 6800. PowerBook: 100Gb HD, 1.25Gb RAM

Our XServe-RAID volume does not mount anymore...

Our XServe-RAID volume does not mount anymore.
On /var/log/system.log I could find the following.
Feb 22 09:52:29 ogre kernel: jnl: open: journal magic is bad (0xf433f != 0x4a4e4c78)
Feb 22 09:52:29 ogre kernel: hfs: early jnl init: failed to open/create the journal (retval 0).
It appears the the journaling is badly screwed.
I tryed to disable the journaling with no success.
Here is what I get.
ogre:/var/log root# diskutil disablejournal disk2s3
The selected journaling request does not appear to be valid
After some googling I foud this :
--- QUOTE ---
The more serious problem occurs when the contents of the journal file are corrupted in such a way that the operating system does not proceed to mount the volume. Fortunately, this problem is extremely rare (I have seen three reports of corrupted journal files at the MacFixIt Forums and Apple Discussion Forums since journaling was introduced).
Starting the journaling process is one of the first things that happens when a volume is recognized by the operating system. There appears to be no way to intervene in single-user mode before the journal file is examined. A message about �bad journal magic� appears. Unfortunately, every tool that can turn off journaling requires that the volume already be mounted.
If the Macintosh can boot under Mac OS 9, dealing with a corrupted journal file involves restarting under Mac OS 9 and using a utility (such as our free TechTool Lite 3.0.4) to make visible these two invisible files at the root level of the volume:
/.journal
/.journalinfoblock
Once these files are made visible, they can be deleted. Mac OS 9 does not support journaling, and recognizes nothing special about these files. Neither of these files can be seen in Terminal or in single-user mode in Mac OS X, because they are considered part of the disk directory.
If the Macintosh cannot boot under Mac OS 9, but the drive has Mac OS 9 drivers installed, the drive can be put into a Macintosh that can boot under Mac OS 9, or an ATA/IDE drive can be put into a suitable FireWire enclosure.
The possibility that you may need to remove these two journaling files under Mac OS 9 is a good reason for making sure that all volumes you use have Mac OS 9 drivers installed. The drivers must be installed when the drive is formatted.
--- [END] QUOTE ---
Well, my disk is part of a RAID 5 matrix.... so the solution proposed does not work.
Does any one of you has any idea ?
XServe Mac OS X (10.3.9)

I've seen an article about volumes not mounting and was wondering if this relates to your problem;
http://discussions.apple.com/thread.jspa?messageID=1239224&#1239224
The thread doesn't refer to journalling but may be of use?
HTH

XServe RAID volume does not mount

Without any modification to the system, a panic log from our XServe indicates:
"Thu Jan 18 17:28:58 2007
panic(cpu 0): HFS: corrupt VH on PBSRaid1, sig 0x4100, ver 0, blksize 0"
The volume PBSRaid1 does not mount anyway from that date.
Diskutil reports:
"Verifying volume “disk2s3”
Checking HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Invalid extent entry
The volume PBSRaid1 needs to be repaired.
Volume check failed."
DiskUtil is unable to repair the volume.
My configuration is:
XServe bi-G3 1GHz, MacOSX Server 10.3.9
XServe RAID with 5 disks RAID5 on the left side (OK) and 4 disks RAID5 on the right side (the bad volume)
All the controls are "green" and nothing wrong appeared in the events log obtained via RAID ADmin.
Any suggestion to repair are welcome, as we have many data from confocal microscopy on that volume.
Thanks
Jean-Pierre
XServe bi G3-1GHz (oct 2003)+ XServe RAID Mac OS X (10.3.9)

Right, Dave.
DW 4 rebuilt a preview folder which contains all the files in correctly named folders.Only 3 files among thousands has been saved in a Rescue folder !
It also restored the right volume label, lost in DiskUtil, fsck, pdisk and others.
Very nice tool.
While DW was building its preview, the disk 9 lighted red and a lot of failures of the controler 2 appear in the events log of the XServe RAID.
At this time, the RAID is rebuilding with our spare disk.
I think we have to change both the disk 9 and the controler 2 despite it lights green currently.
Jean-Pierre
XServe RAID (2003- 5xIBM 180Go RAID 5) +(2005 -4xHitachi 250Go RAID5) Mac OS X (10.3.9)

Apple Xserver Raid, 1 raid mounts and the other raid does not mount

Apple Xserver Raid, 1 raid mounts and the other raid does not mount but all the lights on the drives are green

Kind of lacking in detail there...
Did the other volume mount in the past? and it stopped working? When? What changed?
What does Raid Admin.app have to say about it?
Does it see the drives? a RAID set on those drives? A link on the fiber channel connection?

Xserve RAID won't mount on G5.

Hi,
We purchased an an Xserve RAID yesterday that has 4 x 500Gb ADM's in it. I was checking out the different options in RAID admin and the Xserve was working perfectly, the unit was mounted on the desktop. I changed the RAID type from something I was experimenting with back to RAID 5. This was fine, after erasing the RAID, it showed on the desktop. I copied around 250Gb of data to the Xserve, and it was going fine, until the last Gb or so failed because the name of a file was too long. I thought this was odd, as both the source and destination devices were jHFS+. The RAID then stopped responding, and this required me to forcibly restart the G5. Upon doing this, the RAID didn't show on the desktop. I went into Disk Utility, and there was nothing.
I restarted both the G5 and Xserve multiple times, reseated the fiber card, fiber connections, drives, control modules and reset the control modules. This still didn't work. I deleted the RAID array and created another, the RAID was still invisible in Disk Utility. System Profiler reports that a fiber connection is established. I can't remember the LUNs it shows though.
Does anyone have any ideas?
Any help is much appreciated.
Thanks!
Elijah

I have managed to fix the problem (at least it's still going at the moment...). We were just about to return the Fiber Card to Apple, but just before I removed the card from the G5 I had one last look at the settings on the RAID. Previously I had noticed that LUN Masking was on. I didn't take much notice of this before, as I read in an Apple manual somewhere that LUN Masking is always on while the Xserve is initializing the disks. As a last resort I thought to try and force LUN Masking to be disabled. I changed the array to JBOD, so the disks wouldn't be initialized, and entered the advanced settings. I then went to the LUN Masking section and turned off masking for both controllers. I then shut down the Xserve and unplugged it for 10 minutes.
I then turned on the Xserve and the G5 and to my utter delight, the G5 said "Unrecognized disk inserted"! The G5 was finally seeing the RAID.
I then formatted the RAID and everything has been fine since (4-5 hours).
I have no idea how LUN Masking turned on, the masking list had no devices in it, so the RAID was basically disallowing anyone access through fiber. Upon turning masking off, the RAID reappeared on the G5. Apple support said nothing about LUN Masking when I on the phone to them. I guess they though resetting the RAID controllers would reset the LUN Masking, but it doesn't seem to. I repeat: Resetting the RAID controllers does not reset LUN Masking.
All along this was the problem, but no-one at Apple or the reseller we purchased the Xserve RAID from thought of it!
I hope this helps someone out there.
Elijah
PowerMac G5, PowerBook G4 Mac OS X (10.4.6) G5: 1.8Ghz 1Gb RAM Geforce 6800. PowerBook: 100Gb HD, 1.25Gb RAM

Xserve RAID will not mount to my Mac Pro

We just moved the Xserve Raid to another Mac Pro with 2x3 GHz Quad-Core and 16 GB of Ram. I installed the Xserve card, plugged the cables into the tower and into the Xserve, powered it on, installed the updated Raid Admin, but it wont mount. I checked disk utility and I dont see it there either. The lights on each drive are an amber color so I know something is not right. I wanted to find out what step am I missing, if I am missing some software, if pulling the drives out before moving it caused a problem, or any other suggestions. Any help would be greatly appreciative. Thanks!

If you're not worried about the contents of the drives that a good start because I don't think that's recoverable. What does RAID Admin say about all the other components? Are the controllers green? Technically the yellow lights on the drive are supposed to signal drive issues but I don't know why all the drives would suddenly be an issue without a deeper issue.
Fire up RAID Admin and see what's going on - you're going to need it to delete and try and recreate RAIDs anyway.
Good luck,
=Tod

Switching to Xserver/Xserve RAID

Hi boys and girls...
I was looking for a little assistance in switching over to Xserve. Let me give you some background info first.
Were a small studio in London, with only 11 people in-house and the majority working externally whether free-lance, from home or from another country etc. Were mostly Mac based, though 4 machines are those little beige pc things all running XP 2002. At the minute its 1 G5 and a collection of G4 tower's and G4 power book's, G4 cube's and so on. Were all connected to a G4 server running Mac OS X Server 10.2.8 with a very small dual 120GB HD raid thing running Retrospect.
Our problem is, this system was set up some time ago and were starting to outgrow it.
What were looking for is a way to backup all of our current work and archive all of our old work. Most users like to work directly off the server as theres so much file sharing between the macs and pc's, directly updating files so there isnt any duplication etc.
First question, is it possible (and a good/bad idea ?) to have 10-15 users working directly from a Mac server, that stores the archived work for users to reference and also current work which is backed up to tape and duplicated (as we currently have) to another HD?
Secondly, Is the ideal way to be running things? Is there a more efficent way?
Finally, what kind of spec should we be looking at? There's such a huge difference between servers, while were willing to invest, we dont want to go crazy (maybe a little) on costs.
I look forward to your responses and thank you in advance
Marcus

There are certainly some drawbacks with your current setup that mean you should make some changes.
In general, there's nothing wrong with working with files directly off the server, however, 10.2.8 has some issues with multiple users accessing the same files at the same time, so you should look to move to 10.4 ASAP to address that issue, regardless of any other changes you make.
I am assuming that the remote users don't work this way - uploading/download files as appropriate - it would be painful to work off the server remotely.
The only real disadvantage with working with files directly off the server is that if a file is changed erroneously and saved, there's no easy backup.
If the file was copied to the local drive and saved, it's easy to roll back to the previous version by re-copying it from the server, but if that change is saved directly to the server the only rollback involves pulling out Retrospect.
The other change that would make a difference is installing a gigabit switch and connecting the server to it. Even if all the host systems don't have gigabit ethernet, the extra bandwidth to the server will definitely help.
As for a new server, 10-15 file sharing users are not likely to stress the server, do you don't need a top-of-the-line configuration.
You should first decide how much disk space you need. With 500GB drives, the XServe can handle up to 1.5TB on its own, without any additional XServe RAID. However, you might want to consider RAID (using RAID you're limited to 1TB of RAID 5 storage, or 500GB of mirrored storage in the box).
In addition to your current data usage, consider using an online disk backup where multiple copies of the data is stored on the server itself before (or in addition to) backing up to tape.
While tapes offer several long-term archive advantages, they really don't work so well for quick restores of a file or two. Having a snapshot of the last couple of days data online makes it trivial to step back a day or so without having to resort to tapes. This may mean, though, that your 100GB of data requires 200 or 300GB of disk space.
If you do decide than an XServe RAID is the right solution, consider getting it right-sized from the get-go rather than buying it small (e.g. 4 drives) and adding later. While it can be done, adding drives to an existing array is a PITA.
If you do opt for an XServe RAID, and you don't currently have any rack-mounted equipment, consider using a PowerMac G5 as your server rather than an XServe. While similar in terms of performance, the PowerMac can work out cheaper depending on configuration.

Clarification on how to use Xserve Raid and Fibre Channel without xsan.

First let me apologize for not responding earlier to your response, I tend to get busy and then forget to check back here.
Tod, the answer to your question is No, only one computer is accessing the xserve raid files at any one time and that is via Fibre Channel. However I do have the xserve raids set up as share points via ethernet.
Maybe I should turn that off and only access the files with the one computer that can connect via fibre channel.
I never thought of that. I will try that while I await for your answer, thanks again.
Todd Buhmiller
I have the following setup:
Xserve: 2x2Ghz Dual Core Intel Xeon, 5Gb of Ram, Running 10.5.8 Leopard Server
Xserve Raid with firmware version 1.5.1/1.51c on both controllers, and
Qlogic Sanbox 5600
Apple Fibre Channel Cards in Xserve, and Mac Pro Tower; Apple 2 Port 4Gbs Fibre Channel Card
Mac Pro Tower-Quad Core Intel Xeon 2.8Ghz, 16Gb of Ram, Running Snow Leopard 10.6.4
Here is the problem.
The directory for the xserve raids keep getting corrup, and I use disc warrior to rebuild them. Is there a way to keep the directories from getting corrupt? I am a few pieces of equipment before I can build an Xsan as that is the ultimate goal, but until then, I just need to be able to have the raids funciton as storage without having to rebuild the directories all of the time.
Anybody have any suggestions?
Thanks
Todd Buhmiller
Widescreen Media
Calgary, Alberta Canada
Tod Kuykendall
Posts: 1,237
From: San Diego
Registered: Oct 11, 2000
Re: Xserve Raid Mounts, Corrupt Directory tired of rebuilding directory
Posted: Jun 27, 2010 1:25 PM in response to: Todd Buhmiller
Are multiple computers accessing the same data on the RAID at the same time?
If so then NO. This is the source of your data corruption and I'm surprised if you were able to get all your data back every time if this is how you've been running your system. Each fibre channel assumes it has full and sole control of every volume it has mounted, no data arbitration is practiced and data corruption will occur if this assumption is wrong.
The only way this set-up will work is to use partitions or LUN masks so the volumes are accessed by one computer at any time. As long as one computer relinquishes control before another mounts it you will dodge arbitration issues but this is a dangerous game. If you screw up and mount an already mounted volume - and there is no easy way to tell if a volume is mounted - corruption will then occur. Sharing data simultaneous at fibre speeds is what XSAN does and to do this you need it.
HTH,
=Tod
Intel Xserve, G5 XServes, XRAID, Promise

+The xserve raids will mount automatically to any computer that I connect the qlogic fc switch to+
This is source of the corruption to your data. Any computer that attaches to a drive/partition via fibre channel assumes that it alone is in control of the drive and data corruption is inevitable.
+Is that the issue, should I disconnect the xserve from the fc switch and leave it connected via ethernet?+
Short answer: YES. The ethernet connections are fine because the server is controlling the file arbitration through the sharing protocol. Fibre channel connections assumes complete control over the partition and no arbitration of the file access is performed. It's like two people independently driving trying to drive the same car to different locations.
Depending on your set-up it is possible for the two machines to see and use different parts of the Xserve RAID storage but they cannot access the same areas without SAN doing the arbitration.
Hope that's clear,
=Tod

Xserve RAID lost RAID 5 array on right/bottom controller

I cleanly shut down an Xserve G5 with an Xserve RAID attached and then powered off the Xserve RAID this morning. I replaced a failing memory module in the Xserve and moved the rack 6". I then powered on the Xserve RAID, waited for a couple minutes until it was fully booted, and then booted the Xserve. When it came up, my RAID 50 volume failed to mount. Upon further investigation, it appears that the RAID 5 array on the right hand disks is "gone". In RAID Admin (Disks and Drives tab), the left side array is visible, but all disks on the right side list status as "OK" and Type: as "Spare".
Configuration: Xserve RAID with 14 250 GB disks. Each side was configured with 6 disks in a RAID 5 array and one spare. These were striped using Software RAID on the Xserve into RAID 50 and mounted as a single volume. The RAID firmware is currently 1.5 and the Xserve is running OS X Server 10.4.3.
To summarize today's activities: under Apple's guidance (as this entire system is covered under a Premium Support contract), I swapped the (bottom) controller for the right side, updated firmware (from v1.3/1.20a to 1.5/1.50), multiple resets of both controllers, repeated forced firmware updates, etc.
Also, I swapped the left set of disks for the right set, and the array from the left set now shows up on the right side, and the missing array from the right is still missing with the disks on the left side. I replaced the disks to their original positions with the same results.
RAID Admin's Utility "Recognize Array" will not perform any operations on the rigth side disks and Apple tells me that there's nothing further that I can do with it.
None of this has solved the problem or substantially changed the issue, and the disks on the right side are still missing their associated array. Apple is unable/unwilling to offer any further help except to refer me to 3rd party data recovery services.
Does anyone have any suggestion at all that might possibly recover the missing array? Is anyone aware of any tools that I might use to recreate the RAID 5 array on the right controller? I was hoping that there might exist some low-level tools with which the disks could be recreated into an array by hand? Are there any commercial products that would work on this? Any other ideas?
Many thanks for any suggestions.
- Martin
Xserve RAID (14 250GB disks) on Xserve G5 Mac OS X (10.4.3)

Not sure why you swapped the controllers back and forth
William, I don't think I was clear on this. I swapped the controller with a new controller that I had in a spare parts kit. This was at Apple's request.
really, RAID is not a backup...
I'm well aware, but despite my incessant warnings, users will become lulled in to a false sense of security when something "just works" for a very long time. This array wasn't intended to store valuable data that couldn't be lost, but...
It may be possible for Apple to re-create the RAID set, did you ask AppleCare about the possibility?
Apple has told me more than once that there's nothing else that they can do for me...and yet I keep calling back.
I was surprised that this array was lost when there were absolutely no prior signs of a problem and the system was merely shutdown and restarted cleanly. I'm more surprised and quite disappointed to learn that Apple will do nothing else for me (under a Premium Support contract) to attempt to repair a damaged array. When I asked questions about where the RAID information is stored, I received the answers: "I can't tell you that" and "Apple doesn't release that information". I did not get the feeling that they were working with me, but rather holding my hand while they walked me through published documentation.
I expected that there would be utilities (analagous to filesystem repair utilities) such as RAID Admin's "Recognize Array" that could help repair and recover damaged array data. I think that the lesson that I've leanred today is that I was naive to have expected such a thing without actually having investigated it ahead of time.
Anyway, thanks for your input, William.

Added a 2nd Array on my Xserve RAID, Though it's not appearing in disk utilityt

I have an Xserve RAID unit. Up until now I have just been running 1 side of it with 7 drives on RAID 5 = about 4TB. I recently picked up another identical RAID unit with 7 drives to fill out the right hand bay of the unit doubling our capacity. I have installed these and initialised the array which took about 48 hours, it's now showing as online and green lights all the way.
Now I've gone to make use of the extra space but it is not showing as available in the mounted RAID icon on the desktop, nor will the new array appear in disk utility. When I access server admin however, on the overview screen it shows I have 8TB on offer. Contrary to this in the system profiler the 'Fibre Channel Domain 2' is not reporting any SCSI devices unlike 'Fibre Channel Domain 0' - Not sure this is related.
If anyone can help me gain access to the new found 4TB I would be greatly appreciative.

it is not showing as available in the mounted RAID icon on the desktop
It won't.
The XServe RAID is really built as two independent RAID controllers and drive sets in one enclosure.
The 7 left-most drives are connected to the top controller, and the 7 right-most drives are connected to the bottom controller. They are independent. There's no way to build a single 14-drive array - the best you can do is build two 7-drive arrays.
What you should find is that if you connect the bottom controller to your server, the second array should appear on the desktop, separate and distinct from your existing volume.
If you really need to expand your volume to cover all 14 drives then you'll need to use software RAID 0 (striping) on the server to meld both of the 7-drive arrays into a single logical volume.

Volumes folder on my xserve raid

Hey all!
When my network users login, they can see the root level of my xserve raid. Shouldn't this ve hidden?
What if someone decides to trash my Volumes folder or decides to make any folder they want?
When I try to disable sharing on the root level, of course, the subfolders are inacessible?
Any advice, please?

I assume you mean when your network users log into their workstations they mount the XServe RAID volume shared via some host on the network, right?
If that's the case your solution is to just change the sharepoints on the server to share subdirectories on the XServe RAID rather than the entire RAID.
Use Workgroup Manager to designate other sharepoints on the server. You'd need to look at how the clients are mounting the RAID in order to determine what changes you need to make there.
BTW you can't delete the /Volumes directory, so don't worry about that part.

Maximum size for Xserve RAID modules

What is the maximum storage size for an Xserve RAID module?
Years ago, an Xserve RAID was out of my price range. Now, I'm looking into getting one on eBay and playing around with it.
I have been making Mirrored RAIDS with Western Digital 3 TB My Books.
Can I put 3 TB drives in an Xserve RAID? It probably depends on the controller firmware or something.
Thanks for thinking about this.
Doc

Short answer is no, you can't.
The XServe RAID has IDE drives mounted in a carrier. The maximum size drive shipped by Apple, supported under 1.5.1 firmware on the controllers is 750GB, though finding these on the used market is farily difficult. Aside from that, any IDE drive can be put in the carriers. If your unit has 'blank' slots, these are indeed just blank slots - you will need to get carriers / drive modules if you want disks in the slot if that makes sense.
People on the Internet, myself included, have experimented down the route of using IDE to SATA bridges in the carriers with 2.5" SATA drives which are more freely available. This way you can utilise cheap drives in your drive modules, or even SSDs (which offer little benefit I have found). Some users have had success with 1TB 2.5" SATA drives in this method, but not with anything bigger it seems. Myself, I've had suceess with 500GB SATA and 256GB SSD with this hacky method.
Hope that helps.

Xserve Raid and Windows Machines

Hi All,
I need some help, first and foremost I am not familiar with Xserve Raid units. We have one in a remote office that is connected to all our macs via Fiber. I need to connect a windows box with a fiber card to this SAN also to backup the SAN. How do I go about mounting the volume within windows and what software do I need to connect?
Thanks,
Greg

Are the computers using the RAID as directly attached storage or are they using XSAN (or another product) to access the storage as a SAN?
If they are using XSAN then I'm afraid you're out of luck as we there is no Windows client for XSAN. If they are using a different SAN product then perhaps you'll have more luck with finding a windows client.
HTH,
=Tod

Mounting xserver raid

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