DELL R900 hd replacement Question

Hello EE,

I have a dell R900 with a 2 drive ( 146Gb) mirrored configuration . One of the disks failed, I have a replacement on route , the replacement drive is a used drive . When I install into the new carrier , turn on the host , all PERC model controllers should detect and rebuild automatically , that is my understanding . My question is , will I need to initiate anything in the RAID setup screen or is this all seamless as the manual seems to elude to. Also, The replacement drive is seagate and the original is Dell , will this cause problems?
davesnbAsked:
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rindiCommented:
I don't know that particular model of server, but if the disks are accessible without having to open the server's cover, you would normally just swap it while the server is up and running (hot-swap). No need to shutdown.

If the new disk is empty, it should then start rebuilding automatically. If it isn't empty, you would have to assign it as being a "hot-spare", and then it should start rebuilding.

Make sure you replace the correct disk, and personally I'd take a full backup image before you swap the disk.

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davesnbAuthor Commented:
So I added the new drive, had some issues with it set to "foreign ", so I removed the original working , put in the 2 replacements, "cleared " those, then reverted back to the replacement in 00 and the original working in 01 . I could make the replacement as a global hot spare , however , it reads as attached with the RAID status as offline. This is a perc 6i controller and R900 dell server . The drives are different make perhaps that is the issue ? the replacement reads as below unusable in VD management

PERC 6i
Hotspare in PD Management

PD management
Also , initially before replacement, I received the error stating " there are offline or missing drives with preserved cache .please check the cable and ensure that all drives are present"

error
PowerEdgeTechIT ConsultantCommented:
Put in the original disk and leave all others out of the system. Does it boot?

If so, WHILE THE SYSTEM IS ON, insert the replacement disk. If it doesn't start rebuilding automatically: If it is listed as Foreign, go to VD MGMT screen, highlight controller, F2, Foreign, Clear. THEN assign that disk as a hot-spare as rindi explained.

If it doesn't boot, don't do anything else yet.
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davesnbAuthor Commented:
It does not boot with just the one working original in . gives the black screen attached.
PowerEdgeTechIT ConsultantCommented:
Ok, with ONLY the original disk(s) in, boot to CTRL-R, PD MGMT ... what is the status of the disk(s)?
davesnbAuthor Commented:
ok, i went back to the original configuration , the original drive that was flashing amber in 00 reads as foreign and the 01 as online as attached

original config
PowerEdgeTechIT ConsultantCommented:
But you can't boot your OS? Where does it stop?
davesnbAuthor Commented:
At the black screen before , " there are offline or missing drives with preserved cache .please check the cable and ensure that all drives are present"
davesnbAuthor Commented:
Also, it takes the BIOS start up screen about 5 -10 minutes to get past the progress bar where it shows the blue DELL logo
PowerEdgeTechIT ConsultantCommented:
At the black screen before , " there are offline or missing drives with preserved cache .please check the cable and ensure that all drives are present"
So, it stops at the black screen? or does it stop at the "missing" message? (You said the black screen before the message is where it stops, so I'd guess there to be no message if it stops at the black screen.)
davesnbAuthor Commented:
Stops at At the black screen , " there are offline or missing drives with preserved cache .please check the cable and ensure that all drives are present , press any key to continue"
davesnbAuthor Commented:
Stops at At the black screen , " there are offline or missing drives with preserved cache .please check the cable and ensure that all drives are present , press any key to enter the configuration utility"
PowerEdgeTechIT ConsultantCommented:
What happened leading up to you replacing disk 00? Was the disk ACTUALLY failed/offline? or was it in a pred fail or online status?
andyalderSaggar maker's framemakerCommented:
> had some issues with it set to "foreign ", so I removed the original working , put in the 2 replacements, "cleared " those,

You sure you didn't make a RAID 0 on them after you cleared them?
davesnbAuthor Commented:
Initially, the vmclient showed 2 of 3 guests as guids . From the host , the 00 drive was flashing amber and the host was not responding to an f12 reboot request . It was powercycled and entered the current state described previous with " there are offline or missing drives...."
PowerEdgeTechIT ConsultantCommented:
Sorry ... was it flashing only amber OR alternating amber and green?
davesnbAuthor Commented:
Flashing only amber
PowerEdgeTechIT ConsultantCommented:
If you go to the VD MGMT screen, highlight the controller, and hit F2, what are your options?
davesnbAuthor Commented:
It shows as below, the "clear config", "foreign config > import / clear" , and "manage preserved cache" are all available .

VD
andyalderSaggar maker's framemakerCommented:
I would import the config but only when your original data disk is the only one in the machine, that will update the controller's config with that on your one remaining data disk. Hopefully it will then show RAID 1 with one disk missing as it says RAID0 at the moment but looks like you accidentally made that. May be best to wait for PET to confirm.
davesnbAuthor Commented:
No its raid 0 rhat is not a mistake
rindiCommented:
If it was RAID 0, then you had no redundancy and your only option is to create a new array, then restore the server from your backups. If you want to avoid this in the future, don't use RAID 0...
andyalderSaggar maker's framemakerCommented:
I think RAID 0 is what the controller has in its current config because you accidentally created an array on the new disks. Hopefully the old config was RAID 1. One way to tell - how much disk space was there available under Windows?
davesnbAuthor Commented:
I swapped in the original rives to another R900 and it worked ok , it was the controller or motherboard.
davesnbAuthor Commented:
Thanks all for the help.
andyalderSaggar maker's framemakerCommented:
The controller is probably fine but its saved settings disagree with the disks metadata. You put it in a machine with a blank config so it picked up the disk config as the controller had no saved config.
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