Degraded raid set now missing

I have or should I say had 2 250GB mirrored raid set. They would no longer boot I bought a new drive (same size) and attempted to rebuild the set. This went fine for a time but then failed. Now I can no longer see the raidset. I have tried booting from the server CD and it will stay booted just long enought to show me the raid set is gone or to open terminal then it shuts itself down.
I desperately need the data on this server. My most recent backup to tape was the end of January.
G5 Server Mac OS X (10.3.9)

Both hard drives were ruined by a power surge.

Similar Messages

Degraded RAID set

Hi All,
Dual Core 2.0 running 10.4.2. I set up a raid set and one of the drives almost immediately reported a SMART failure. So I replaced it. No problem, no downtime, even. The machine functioned fine with just the one drive.
Now...
Bought a replacement second drive. Added it to the RAID set, rebuilt it. No problem, but the RAID set still reports as degraded. I cannot delete the damaged drive because I don't have it anymore (hindsight is 20/20). How can I delete the non-existent drive?
Thanks,
Danny
Dualcore 2.0 G5 Mac OS X (10.4.2)

Yeah, but if you've only got 2 slices and one of them
is out to lunch, well, it's not rocket science to
know what your risk is ...
Well, actually, one failed and has been replaced. It was pretty easy to add the new drive to the RAID set (just drag and drop into the RAID and then rebuild it). The machine worked ave without the failed drive hence...
What worries me is that I don't know for sure
if the RAID array is actually working as designed and
I haven't found a definitive statement about what
exactly 'degraded status' means. Does it mean
'not working as well as it should but still doing the
job' or does it mean 'this RAID array isn't doing
diddly and sometime soon you're gonna be up the
creek.'
As you could see, the RAID was working very well. One drive died and the machine continued working fine, so there was NO downtime (except to switch off the G5 and yank out the failed drive). I'm guessing degraded means that one of the registered slices is missing. But if you have another registered slice, then you're fine.
More specifically, if my primary drive actually does
die, is there a complete dupe on the second drive in
the array or not?
As in my example, that's exactly right. The hard drives are exact copies.
I guess I should go ahead and do a hard backup on an
external drive and then just pull out the primary
drive (it's hot-swappable) and see what happens.
Yes, RAID is not back-up. If you have a corrupted directory structure due to software, then you would have to rely on a back-up. But it's nice to have both, really, as the most common problem with disks is hardware failure and this minimizes problems involved.
To tell you the truth, though, I'm not sure I'd bother again. I find that using psync (available from bombich.com under the Carbon Copy cloner section) works fine. It creates a fully working system disk and can be set to clone the start-up drive daily. If the main disk fails, most people won't even notice that they're starting up from the second one.
So back to the question: how to remove this degraded status?

Degraded RAID set (mirror)

I am running a pair of 2 GB external drives in RAID 1 (mirroring) using the OSX Disk Utility. Recently I noticed that the set shows it's RAID status as Degraded and one of the two drives is indicated as "Missing," which keeps the "rebuild raid set" button grey. However, I can verify each of them separately and they appear to be okay. Only one of the drives appears to be partitioned correctly; the "missing" drive simply shows a RAID slice for the entire 2 GB.
I would recreate the mirror set, except that I don't have anywhere to store the 1.3 GB still on the good drive, and I believe I cannot create the set again without erasing the contents. (I back up to the RAID set as well as use it for un-backed up storage, which I think is safe as long as the RAID set is working.)
Any ideas how to get the "missing drive" to reappear, so the system can rebuild the set? Or any other ideas to get out of this problem? Thanks.

It doesn't change the problem, but obviously I meant TB (not GB)

Degraded RAID set help

Hello Support Community,
I have a 4 bay RAID set that all of a sudden is showing as degraded. I have two pairs of disks each striped, and then have those two pairs mirrored. Not sure if this is a correct RAID format, but it is what it is right now. So both striped sets say online, with no problems, but my mirrored set of those two pairs shows that it is degraded. See below.
Any thoughts as to what might be happening? I have the options set to automatically rebuild the RAID. How do I know this is happening? How long should I expect this to take? It's a 4TB raid in it's current config, and there is about 3.7TB of data on this RAID. I have everything backed up in two other locations. Am I better off starting from scratch? Or should I just let this thing run for 2 weeks and see what happens? Any help would be greatly appreciated.
Thanks
Dave

No, I was doing all of this in disk utility. I left the arrary running overnight, and it's back online now. Not sure what got screwed up.
Thanks

WinXP booted after BIOS update cleared RAID setting, now won't boot in RAID mode

I updated the P965 Platinum BIOS to 1.7 and my system stopped booting. After much experimentation I discovered it would boot if I unplugged the monitor and mouse, so I was able to "upgrade" to 1.6, and it's working again. However, the first time it booted blind with 1.7 it got all the way to Windows before I realized what happened.
My system was set up with a RAID1 pair, but the BIOS upgrade cleared the SATA mode to IDE, and it booted Windows before I changed it back. Now Windows won't boot when I set it to RAID. It complains <windows>/system32/hal.dll is missing or corrupt. It seems to work (mostly) when I put it back to IDE mode. How do I get it back to RAID1?
P965 Platinum
Core Duo 6600
2GB RAM
2x320GB Seagate SATA hard drives
Samsung IDE DVD-RAM drive

Quote from: erikFC on 05-November-07, 23:41:04
I updated the P965 Platinum BIOS to 1.7 and my system stopped booting. After much experimentation I discovered it would boot if I unplugged the monitor and mouse, so I was able to "upgrade" to 1.6, and it's working again. However, the first time it booted blind with 1.7 it got all the way to Windows before I realized what happened.
My system was set up with a RAID1 pair, but the BIOS upgrade cleared the SATA mode to IDE, and it booted Windows before I changed it back. Now Windows won't boot when I set it to RAID. It complains <windows>/system32/hal.dll is missing or corrupt. It seems to work (mostly) when I put it back to IDE mode. How do I get it back to RAID1?
P965 Platinum
Core Duo 6600
2GB RAM
2x320GB Seagate SATA hard drives
Samsung IDE DVD-RAM drive
Hi,
Why did you upgrade to 1.7 bios?
Also, you do not by have by any chance a Nvidia based card in system?
Del

Suggestion for fixing broken raid set

Jesus. Again. Twice in 6 months. Raid set failure.
2:58pm today : Drive 3:50014ee2aede46eb missing - Previous drive status was inuse
2:59pm today : Degraded RAID set RS1
2:59pm today : Degraded RAID set RS1 - No spare available for rebuild
Jesus...
After launching the Raid Utility, I notice that one drive is actually missing from the drive bays.. Its just gone, and I have not done anything to it. This happened last December as well. Hard booting the drive (pull out, push back in) worked last time to get the drive online, but jesus. Twice? I should maybe replace the drive? I am using Apple Raid Card, people say it turns to be pretty strict about the drives state, but why the **** it keeps disappearing from the system?!
I was already on the phone with one Apple consultant about this, and I think everything is pretty OK. I have good backups, and gladly, the OS RAID set is ok. Only our accounts and work files were in there, and all is secured. But this is really stressful.. Feels like I can't trust these drives one bit. And they are good drives, standard hardware what comes with Mac Pro.
Just when I was starting to think that everything is finally working smoothly..
Any recommendations about how to act now. I know what I have to do but, it would be encouraging if I would get some steps to how to fix it. Working order etc.
Everything works tho, taking one separate set of backups at the moment just in case. I just need to get my act together and fix it. God I am annoyed tho.
Good weekend to everyone tho. Comments are appreciated.

Yeah, I already ordered a new drive.
I can't do any tests for the bad drive cos it just disappeared from the system totally. I guess it could come online if I hard boot it again (like when the raid set broke last december), but I don't feel like doing it before I get the new drive. Need to analyze it on another computer.
The consultant I talked with earlier mentioned that the RAID card is pretty strict about the condition of the drive. But I would like to know if that is why the drive keeps disappearing, if it really totally ejects it from the system . I heard that some cases the the Raid Utility just shows the red light what indicates the drive state if there is a problem, but for me the drive is just gone totally.
Hope that the new drive arrives soon. Will the Raid rebuild itself if I insert the new drive and mark it as global spare ? That's what I understood from reading the Raid Utility manual.

Why a Apple RAID controller card cannot delete a RAID set?

Hi,
I just have a problem with my RAID set created with RAID Utility. My configuration is as follows:
     Mac Pro (early 2009 model) 2 x 2.66GHx Quad-Core, 16GB DDR3 1066Mhz Memory
     Apple RAID Card (HW Ver 2.00 and FW Ver E-1.3.20)
     1 x 1TB HD (Apple original) in Bay 1 as boot disk configured as Enhanced JBOD
     3 x 2TB HD (WD black series RE) in Bay 2 to Bay 4 configured as RAID 5
     Mac OS 10.7.4
The RAID Utility showed the following messages:
Degraded RAID set RS2 - No spare available for rebuild
Degraded RAID set RS2 - No spare available for rebuild
Degraded RAID set RS2
Drive 3:50014ee20352f5e8 missing - Previous drive status was inuse
Drive 3:50014ee20352f5e8 failure detected - Primary disk port unusable, previous drive status was inuse
Furthermore, RAID Utility shows:
1) Bay 1 (RS1 boot drive): Assigned, verified, Status good. viable (good)
2) Bay 2 (RS2 RAID 5): Assigned, verified, Status good, viable (degraded)
3) Bay 3 (RS2 RAID 5): Roaming, verified, Status good
4) Bay 4 (RS2 RAID 5): Assigned, verified, Status good, viable (degraded)
It also showed "Severe Events" message: "Degraded RAID set RS2 - No spare available for rebuild."
I tried to delete the RAID set using Apple RAID Utility but nothing happened. Can anyone help as I have to rebuild the RAID set from scratch? Thanks.

Hi flognoth,
flognoth wrote:
I have swapped the drives in bays and it is always bay 2. I'm coming to the conclusion that either the RAID card is failing in bay 2 or there is a Lion / Mountain Lion issue with the RAID card.
I would say this is not "a Lion / Mountain Lion issue with the RAID card", as I have an "Early 2009 Mac Pro" that is running Snow Leopard (10.6.8), fully patched, that is exhibiting a similar issue, after about 4 years of no such problems.
My RAID configuration is just like yours: 4x 2TB drives, with Bays 1 & 2 as RAID 1 and Bays 3 & 4 also as RAID 1. I keep losing either Bay 1 or Bay 2 disk, and after reboot typically see it as a good disk, in the green, but now unassigned to a RAID set, and marked as "Roaming". When I assign it as a spare, so far the RS1 RAID Set begins to rebuild, and things are okay for a short while.
Initially this happened about once a month, starting about 3 months ago, now it is a weekly or several times weekly event.
I've put in new disks (several), restored from a Time Machine backup, and just came in today to find the Bay 2 disk "Roaming".....
I'm going to try a new Mac Pro RAID card, as I have a spare - just looking for information about whether the replacement RAID card will pick up the RAID sets from info cached on the disks (I hope!), or whether I have to newly create the RAID Sets & Volumes, and then re-populate from Time Machine / the old disks.
I will say that I've been running 8 "Early 2008 Mac Pro" computers with RAID cards, each configured as above, and 4 "Early 2009 Mac Pro" computers similarly configured. These were all deployed between late 2008 and the beginning of 2010. I've had little difficulty with them, and they've been wonderful when an actual disk failure has occurred. I've had about 6 actual disk failures among all these setups.
cheers!

Need help with RAID Card and degraded Raid-5 errors

Dear all,
I recently purchased a used Apple RAID card for my 2008 Mac Pro 8-Core. The installation went smooth, the card was immediately recognized and the battery reconditioned within one night.
So I started setting up a Raid Set with the 4 identical drives which I already used before as a software Raid. But each time the Raid Level-5 Volume is created, somewhat later the status turns red and the Raid is listed as "degraded"!
A closer look at log reveals:
+19:42:54 Drive carrier 00:01 inserted+
+19:42:27 Background task aborted: Task=Init,Scope=DRVGRP,Group=RS1+
+19:42:27 Degraded RAID set RS1 - No spare available for rebuild+
+19:42:26 Degraded RAID set RS1+
+19:42:22 Drive carrier 00:01 removed+
+15:10:57 Created volume “R1V1” on RAID set “RS1”+
So it seems that the drive from Bay 1 somehow gets lost (removed) a few hours after the volume is being created and anysoon later it's being "reinserted"...
Of course, the drive is NOT removed, nobody touched the Mac Pro! Also I did the same procedure 3 times and the result was always the same.
I also tried setting up JBOD and different RAID levels which do all work without a problem. Only when choosing RAID5 (what I intentionally bought the card for), the problem reappears
Anyone any solution or hint for me concerning this problem? Many thanks in advance!

One drive completely broke down later. Replaced that drive and since the problem's gone!

Offline Disc In Degraded Mirrored RAID Set

I have a 2 disc (300GB each) mirrored RAID set that has worked fine up until recently. One slice appeared failed so I attempted to rebuild it. 7 hours later it still showed up as failed. I attempted a rebuild once more and the same result. I then shut everything down and re-booted my whole system. Now the RAID set is still degraded but the slice now shows up as offline as opposed to failed.
I checked the connections and it's all connected fine.
I have run First Aid several times and no repairs were necessary.
Anyway I can get this back 'online'?
If not, can I delete it, repair it and if it's repaired add it back to the RAID set?

It sounds like one of the drives in the mirrored set has lost its mind (i.e., failed).
This is exactly the situation Mirrored RAID is good for.
Remove the failed drive, insert your spare drive of the same or larger size, and assign it as a spare. Then you should be able to get the RAID to rebuild onto the spare and bring it up to date in the next half-a-day or so. Then the mirror will show as working again.
Make sure your Backup is up-to-date. A second failure now (before the array has rebuilt) will give you data loss.

Mirrored RAID set has degraded following power outage.

Hello,
Following a recent power outage our Mac Pro running Leopard OSX Server with 2 x 1TB discs in a Mirroring RAID configuration (with an installed RAID card) developed a 'severe error' message.
The Raid Set R0-1 has a Viable (degraded) status.
Drive One (or bay 1) is 'Good' and 'Assigned'
Drive Two is 'Good' but with the State - 'Roaming'
Also, the events display describes the failure of a drive 3 (there isn't one) and that the R0-1 is Degraded and no spare is available.
So, we're a little confused.
1. Is the Drive 2 no longer part of the RAID mirror (i.e. Roaming)
OR
2. Something more significant has happened hence the bogus Drive 3 message?
Any suggestions or advice would be much appreciated as always.
Thanks
Steve

Yes. Verification with the GUI tool is the first step. But... hmm, if you are dropping communications with the card, that is not a good sign. Make sure you have a backup and then try a PMU reset on the system. Maybe there is something wacky in the power manager. Then try any/all of these from Terminal to get more information:
raidutil list status
raidutil list eventinfo
raidutil list raidsetinfo
This should provide feedback. If these commands fail, then I fear that the card is not responding. Do you have AppleCare? It might be time to call for a replacement card.
Hope this helps

Raid drive periodically "missing"

I have an xserv 2.8 quad xeon with an internal raid (3 drives, RAID 5). Drive in bay 3 periodically showed up as missing and the raid set was degraded. I marked it as a spare and the raid set rebuilt. This happened several times so I replaced the drive with a new identical drive. Now it the same thing is happening again.
So my assumptions for possible causes are:
1. Raid card has failed (unlikely?)
2. The new drive in the same bay has failed (unlikely?)
It takes almost 3 days to rebuild the raid array so it is very time consuming to troubleshoot. What steps can I take to determine the actual cause of the failure and fix it permanently?
Thanks,
Eric

I'm having the exact same problem, or at least really similar.
I thought I'd configure everything as RAID-0, all brand new drives. Those shouldn't crash very fast.
Big mistake of course... But the weird thing is, in the RAID_Utility it says all the drives are "green" smart: checked and status: good. But it removed one of the disks from my raid. Is there any way I can "plug" that drive back into my raid set? Because the drive is ok, but it's just de-coupled from the set....
ty!

Performance degradation after setting filesystemio_option=setall from none.

Hi All,
We have facing performance degradation after setting filesystemio_option=setall from none on my two servers as mentioned below.
Red Hat Enterprise Linux AS release 4 (Nahant Update 7) 2.6.9 55.ELhugemem (32-bit)
Red Hat Enterprise Linux Server release 5.2 (Tikanga) 2.6.18 92.1.10.el5 (64-bit)
We are seeing lots of Disk I/O happening. We expected "*filesystemio_option=setall* " will improve performance but it is degrading. We getting slowness complains.
Please let me know do we need to set somethign else along with this ...like any otimizer parameter( e.g. optimizer_index_cost_adj, optimizer_index_caching).
Please help.

Hi Suraj,
<speculation>
You switched filesystemio_options to setall from none, so, the most likely reason for performance degradation after switching to setall is the implementation of directio. Direct I/O will skip the filesystem buffer cache, and and allow Oracle to read directly from disk to the database buffer cache. However, on a system where direct I/O is not implemented, which is what you had until you recently messed with that parameter, it's likely that you had an undersized database buffer cache, but that was ok, because many (most) of the physical I/Os your database was doing, were actually being serviced by the O/S filesystem buffer cache. But, you introduced direct I/O, and wiped out the ability of the O/S to service any physical I/Os from filesystem buffer cache. This means that every cache miss on the database buffer cache, turns into a real, physical, spin-the-disk, move-the-drive-head, physical I/O. And, you are suffering the performance consequences.
</speculation>
Ok, end of speculation. Now, assuming that what I've outlined above is actually going on, what to do? Why is direct I/O lower performing than buffered, non-direct I/O? Shouldn't it's performance be superior?
Well, when you have an established system that's using buffered I/O, and you switch to direct I/O, you almost always will have to increase the size of the database buffer cache. The problem is that you took a huge chunk of memory away from the the O/S, that it was using to buffer your I/Os and avoid physical I/O. So, now, you need to make up for it, by increasing the size of the database buffer cache. You can do this, without buying more memory for the box, because the O/S is no longer going to need to use so much memory for filesystem buffers.
So, what to do? Is it worth switching? Well, on balance, it makes sense to use direct I/O, and give Oracle a larger database buffer cache, for the simple fact that (particularly on a server that's dedicated to being an Oracle database server), Oracle has far more sophisticated caching algorithms, and a better understanding of the various types of data being cached, and so should be able to make more efficient use of the memory, than the (relatively) brain dead caching algorithms of the kernel and filesystem mechanisms.
But, once again, it all comes down to this:
What problem are you trying to solve? Did you have any I/O related issues? Do you have any compelling reason to implement direct I/O? Rule #1 is "if it ain't broke, don't fix it." Did you just violate rule #1? :-)
Finally, since you're on Linux, you can use the 'free' command to see how much memory is on the box, how much is free, and how much is dedicated to filesystem cache buffers. This response is already pretty long, so, I'm not going to get into details, however, if you're not familiar with the command, the results could be misleading. Read the man page, and try to be clear about understanding it before you make any assumptions about the output.
Hope that helps,
-Mark

Advice on RAID Sets, Volume Sets, and RAID Levels of the Volume Sets using an Areca Controller

I have read through a lot of information on disk usage, storage rules for an editing rig, users inquiries/member responses in this forum and I thank each and every one of you – especially Harm.
In building my new workstation, I purchased five (5) WD 1T, 7k, 64M SATAIII hard drives and an Areca RAID card, ARC-1880ix-16-4G, which I plan to use primarily as my media/data disk array. The workstation will use a 128GB SATAIII SSD as the OS/program drive and I will transfer two (2) WD Raptor/10k SATA 70GB drives from my current system for pagefile/scratch/render use. I tentatively plan on using a mobo SATAIII port for the SSD and mobo SATA ports with a software RAID (level 0) for the 10k Raptors.
In reading the Areca Instruction manual, I am now considering exactly how I should configure the 5 physical 1TB drives in terms of RAID Level(s), Volume Sets, and RAID Sets. I must admit that I like the opportunity of allowing for a Dedicated Hot Spare as I am generally distrustful of the MTBF data that drive vendors tout and have the bad experience in the past of losing data from a mal-configured RAID array and a single drive hardware failure (admittedly, my fault!).
In line with the logic that one doesn’t want to perform disk reading while trying to write at the same time (or vice-versa), I am thinking the approach above should work OK in using the mobo disk interface and both software and external hardware RAID controllers without having to create separate RAID level configurations within a Volume Set or further dividing up the physical drives into separate RAID sets. I know in forum messages that Harm noted that he had 17 drives and I could envision a benefit to having separate RAID sets in that situation, but I am not at that point yet.
To some degree I think it might be best to just create one RAID Level on one Volume Set on one RAID Set, but want to solicit thoughts from veteran controller users on their workflows/thoughts in these regards.
Anyone care to share thoughts/perspectives? Thanks
Bill

Thanks for the speedy feedback Harm - I appreciate it.
I was thinking RAID level 3 as well.
Of course, it's always something! I purchased the Caviar Blacks by mistake - which are non-TLER. I will work with EggHead to return the ones I purchased and replace them with RE4 versions as I'm not thrilled about the possibility of the controller declaring the volume/disks degraded unnecessarily and although I have the DOS utility WDTLER where one is supposed to be able to enable/disable TLER on WD drives - I suspect WD is way beyond that now anyway with current builds.
I agree with you about just testing the performance of the options for the raptors - on the mobo and then on the controller. When I benchmark them I'll post the results in case others are curious.
Thanks again....off to EggHead!

RAID Set not showing up - 3 severe events

Intelle Xserve running 10.6 RAID Card running firmware v E-1.3.2.0, Two it drives set up with I think RAID 5.
The main person for the system is away as well as his backup. So I'm running on very little information at the moment.
Log:
Called in due to user not able to access shared files (Also shared FileMakerpro databases and Portfolio server). Only access to server was via screen share.
Could not connect. After trying all that I could, powered down the server. Restarted, got a login startup permissions error for an item to run at startup. (I'll have to check what exactly that was). Started the Portfolia server and the FileMakerpro databases. Users able to access and use.
Next day same thing. User lost connection with the server. Restarted, start filemakerpro databases and portfoilio services. User able to access.
I suggest pulling over the files needed to work just in case it looses connection again, User starts to pull over some files which is transfering.
About 15 minutes later I get a call that the user lost connection again.
Restart the once again. This time get errors from the RAID utility:
Non-viable RAID set RS1 and all associated volumes are offline
Drive 3:500 missing - Replace immediately or acknowledge loss of RAID set RS1 and associated volumes
Drive 3:500 missing - Previous drive status was inuse
The RAID utility does not show a RAID set.
The drive appear to be OK
The drive shows up on the desktop but when I go into the drive the folders etc are showing. Access the main folder results in a loop where it bails out and just shows the desktop again.
I'm going to get some files to the user from the timemachine backup for now.
Is it possible that the data is OK and maybe the drive are marked off line for the set but still OK?
Any info would be great,
Thanks

Yes the 160GB has the OS. I'm coming into this cold as the main person and the backup are currently away.
I have got the users a work around so they can do thier work. The backup person has very limited email contact and he had thought it was a RAID 5.B But I would agree this looks to be a RAID 0 or 1 since there are only two drive available for data.

Apple RAID Utility Raid 0 one disk roaming making raid set not viable

Hello!
I have a problem with RAID 0. In the picture below you can see that one drive was set to missing and RAID set RS1 has been set to non viable. However all four drives(Bay1-4) are set to be verified with status good. However as can be seen from the picture Bay 3 is set to status: Roaming
I don't know what I can do here. There was some talk on other discussions but nothing that helped me
Thanks to anyone that read this and try to help me. If you need more detail I will be more than happy to give them to you.
http://shrani.si/f/G/Z9/1KO4CaVc/screen-shot-2012-10-17-a.png
http://shrani.si/f/41/yG/2o1mIfV/screen-shot-2012-10-17-a.png
http://shrani.si/f/3p/v/35kiFJyD/screen-shot-2012-10-17-a.png
http://shrani.si/f/1m/lg/KcXG8j/screen-shot-2012-10-17-a.png
http://shrani.si/f/1Q/ET/2UkxU4ml/screen-shot-2012-10-17-a.png
http://shrani.si/f/R/ma/6jYOaty/screen-shot-2012-10-17-a.png

An error with drive in bay 3 threw it out of the RAID, breaking the Striped RAID. You data will be very difficult to recover, since the data are striped on two different drives, and one of them is no longer part of that RAID set.
You now need to re-initialize the RAID set (which destroy what is left of the data) using the same or different drives, and restore the data from your backups if desired.
I recommend writing zeroes to every block on the troublesome drive before even thinking of returning it to service.

Degraded raid set now missing

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