PowerEdge HDD/SCSI/RAID

Last reply by 05-26-2022 Unsolved
Start a Discussion

RAID 5 "OFFLINE" - please help

Hi!

My PE 2900 server <Service Tag removed. TOS77> somehow lost power when I was at work a few days ago.
And I have not been able to boot into the OS (Debian 11) since.

I have understood that I can not boot due to that something has happened to the RAID configuration in some way. (Not sure what though.)
But from what I can see, there are three disks that are "missing" and one disk is "ready".

Unfortunately I do not know much about RAID / PERC and I really need your support.

Tried to run DSET (following an online advice) from a Debian Live CD, but I did not succeed.
Also tried booting with "Dell OMSA Live CD" but there were not many options for me to do there, (which I was comfortable with). I have no backup of the disks, so I MUST get this fixed somehow.

I am on sick leave after a stroke and can not afford to leave the disks to a company for help with backups etc.

I really need all the help I can get and even though I have a bad finances, I can pay around $ 50 to the person who helps me get the server back up, or so that I can take a full backup of everything.

 

20220516_192231.jpg20220516_192404.jpg20220516_192532.jpg20220516_202557.jpg20220516_202619.jpg20220516_202716.jpg

Replies (46)
7 Thorium

Are these all the original disks? Did you try swapping or inserting or reseating any of the disks?

See if you have this option:

On the VD MGMT screen, highlight Controller, hit F2, Foreign, IMPORT.

I think so!? I havent installed any disks myself.

I tried to re-seat the ones who where "missing" but that didnt do much.

Im gonna try to import the foreign config as soon as I get home in about 7 hours.

I bought a sata docking station a couple of days ago. But since the disks on the server are SAS i can't use the docking station to backup anything either.

Hello, good luck and let us know how it goes.


DELL-Young E
Social Media and Communities Professional
Dell Technologies | Enterprise Support Services
#IWork4Dell

Did I answer your query? Please click on ‘Accept as Solution’. ‘Kudo’ the posts you like!

The "Foreign Config" is grayed out. (see attached image)Foreign ControlForeign Control

Hello @Guldstrand,


Sorry for the situation. I wish we could help you more. Please, always keep a backup of the data. In the current server condition, if some of the disk failed, data might be lost. For that reason, you always want to have a backup of the information.


So there is no foreign configuration present. Only one option is let, retagging the disks. When you clear the foreign configuration you are deleting the virtual disk. It only deletes the data that describes the virtual disk, so it may still be possible to get the virtual disk back by retagging. Retagging is the process of creating the same virtual disk as before. It will rewrite the data that describes the virtual disk.


If the data is important then you should contact a data recovery company. Not all controllers can be retagged, some controllers force a full initialization on virtual disk creation. A full initialization is a low level format, similar to writing zeros to a drive.


A retag requires that almost everything be the same. You must use the same disks (not failed ones). Predictive failure disks should still be functional, so you can use them to retag.


If you don't have a foreign configuration listed anymore then these are the steps for retagging:


1. Create a new array using the same stripe, RAID level, and member disks as before. The caching options and size don't matter.
2. Do NOT intialize the array when you create it. An initialization is a low level format that will wipe the data.
3. Boot up the server and check to see if the data is present.


Regards.


Diego López
Social Media and Communities Professional
Dell Technologies | Enterprise Support Services
#Iwork4Dell

Did I answer your query? Please click on ‘Accept as Solution’
‘Kudo’ the posts you like!

Thank you very much for your answer and for your consideration.
As I said, I can not afford to leave the server to any "rescue company".

Could there be a problem with the CMOS battery and / or the battery for the raid card?

And should I try re-tagging the disks even though there are four disks that are "missing / ready"?
Should I delete all current RAID configurations and then restart the server?
What happens if I put ONE disk "wrong"?

A link to a video i made during boot.

Guldstrand,

 

It wouldn't be an issue with the batteries, as the cmos battery would cause a loss of settings in the BIOS, and the raid battery is for saving cache data on case of failure.

 

With the retag, the drives would have to be visible to the controller, so if they are showing ready that woul be fine, but missing would be an issue.

If you are incorrect on the placement of the drives in the configuration when you do a retag, it can corrupt the data, as the data isn't in the location it is expected when it boots.

That is why we recommend taking the drives to a 3rd party data recovery company if the data is vital, and you have reservations of the retag.


 

 


Chris Hawk
Social Media and Communities Professional
Dell Technologies | Enterprise Support Services
#Iwork4Dell

Did I answer your query? Please click on ‘Accept as Solution’
‘Kudo’ the posts you like!

Ok, i understand. (i think)
The four disks is shown as missing under "VD Mgmt>Physical Disks" but ready under "PD Mgmt", that´s why i asked.

Does this mean I should start re-taging, after i've cleared/removed any other configs?

Before you do that, I ran across this in the knowledge base article regarding the issue, you can find it here.

You may want to look at the steps there first.

 




Chris Hawk
Social Media and Communities Professional
Dell Technologies | Enterprise Support Services
#Iwork4Dell

Did I answer your query? Please click on ‘Accept as Solution’
‘Kudo’ the posts you like!
Top Contributor
Latest Solutions