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RAID stands for Redundant Array of Independent Disks.

RAID is data storage technology that allows multiple drives to be used together as a single virtual drive for reasons such as fault tolerance, reliability and performance.

There are several different levels of RAID that determine how the data is stored and the level of redundancy achieved across the drives.

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I have a Dell Precision T7600 with a H310 RAID Adapter. there are two Virtual Disks. One for the OS (Ubuntu) and another for data. Two months ago I replaced the data volume with four new Western Digital 5TB drives in a RAID 10. Suddenly, this volume is unavailable. When I go into the RAID Controller and look at Physical Disks all disks are present but all four WD disk show as Foreign. Under Virtual Disks, the data volume shows only two of the four disks. One says Ready, the second says Rebuild and the other are Missing.

It seems highly unlikely that two disks failed simultaneously. There haven't been any electrical anomalies and all the fans and temp sensors in diagnostics are normal. I re-seated all of the drives and RAID Controller connections and no change. I tried Importing, which fails.

The data on this volume is really important. What would be the best way to recover this RAID?

Thanks in advance
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A friend had an old Windows Home Server NAS with 4 drives. He experienced a power outage which seemed to wipe out his NAS (no UPS). He tried to access the drives in a caddy, but couldn't see any data (he thinks it was setup as mirrored or as RAID - not sure). For some reason he formatted the drives and attempted to recover the data (mostly family pics). When images are recovered they are not shown and look corrupted.

Is there anyway these can be recovered?

We have a Dell PowerEdge T710 and there are a total of 8 x 450 GB (15k) SAS.  There are 2 Raid partitions:

- 2 hard Drives = Raid-1
- 6 hard drives = Raid-10

Someone else setup this server and I am not sure which hard drives are set for which raid partition.  I do not want to assume that hard Drive Slots '0' - '1' are set for Raid-1.  How can I verify?  Please see the attached picture.

Replace - 1
I know how big each partition is and I can see what is installed on each partition so I want to know which partition is in jeopardy.  My questions are:

1.  How can I find out which partition the bad hard drive is assigned to, the Raid-1 or the Raid-10?

2.  How can I replace the bad hard drive with a replacement hard drive without loosing the data?
I can obtain an old Poweredge 1950 III server with an Intel Xeon 5420 processor installed  and a SAS6ir raid controller. The spec sheets says it supports virtualization, I plan on using 2012R2 as the host. Are there any issues I need to be aware of as this is obviously an old platform. This config is for testing purposes
I am looking into Dell architecture for Exchange 2016 implementation using Dell servers. In storage section they are saying " Fourteen independent Raid 0 disks can be used to store copies of Exchange databases ( A Raid Controller Can be used to create independent Raid 0 volumes by using internal drives. ) " 

Are they saying to create 14 Raid and each Raid 0 with single disk?  Can any one elaborate this please?

We have a old windows 2003 server with 4gb of ram with hardware raid 5. We are going to retire this server, but before we do so we need to transfer/clone/mirror about 900gb of data.  The problem is that it has almost 6 million files and any type of data transfer I have tried runs really slow.  I am thinking if there is a way to do with clonezilla or any other software that you guys can suggest.

I bought several of these servers off ebay and need to configure RAID (50 hopefully). After pressing F9 how do I get to the 410i controller (or whatever it is) to configure a RAID level?
I purchased four HP DL 380 G7 servers off ebay. The final goal is to eventually load ESXi 6.0 on each, but my question here is about the first step -  configuring the RAID array.

I've looked through some youtube videos and it appears the folks are using HP SmartStart Setup and Install CD (ver8.70) and using the Maintenance/HP Array Config & Diag utility to control the P410i in creating the array.

I had a very hard time finding this software CD. I had to choose HP DL 380 G7 and then choose an O/S in order to see it listed. I saw it listed under Windows 2003 and Windows 2008R2.
Windows 2003      - Shows a 32 bit version
Windows 2008R2 - Shows a 64 bit version

Does it make any difference which "HP SmartStart Setup and Install CD" I choose? I downloaded the 64 bit version from Windows 2008R2  thinking it doesn't matter if all I'm doing is using the RAID utility. Does it matter if its 32 or 64 bit version? Again the end game is to install ESXi 6.0.

Please advise. I have a Dell PowerEdge T420 where the hardware is fine but SNMP for Solarwinds MSP Remote Monitoring is reporting a battery issue  for:
DELL PERC H310 SCSI - "Dell - RAID - Storage Management" and "Dell - Battery State - State of battery" is reporting "Unsupported SNMP variable. Everything matches the other working servers. However I want to compare the OIDs from the Dell Server vs. the Reporting Software. For the monitoring software it is reporting (battery) OID:
Please advise
FYI: Could not find matching hardware when I ran the SNMP Walk on the problem server unless I am looking for the wrong thing? Searched for "battery" and "RAID"
I had a healthy 2012 server with 8 (RAID 5/software RAID) sata hard drives and two raid 1 c hard drives with the Operating system on the C rive/raid 1critical data no back ups. The server crashed and had to rebuild the server. Problem is when I finished building the server and tried to import the drives instead of coming up 8 of 8 drives they come in two sections. One is 4 of 4 disks and the other is 4 of 4 disk. In each of the times I attempted to import it sees the total size but says  and  I am paraphrasing "data incomplete and will be destroyed if ok is selected. I dread importing the data 4 disk at a time because it would destroy the data. Anyway to get the disk computer management to display 8 of 8 and help save all my data.
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Dell Disk storage  array was attached to the sever, I removed the cable  storage to server  and when I boot got this message.

Foreign configuration(s) found on adapter
Press any key to continue, or 'C' to load the configuration utility.
All of the disks from your configuration are gone.  If this is an unexpected message, then please power off your system and check your cables to ensure all disks are present.
Press any key to continue, or 'C' to load the configuration utility

I believe it found RAID info on the disk, we just need to  import the config. Am I right?

We have Dell server poweredge 610T and one of the disk is failed.  We need to replace the disk and rebuild the raid 5.
What are the steps I need to do after I put the new disk.  Can someone explain step by step? Thanks in advance.
Dell R710 - 4 disks in a RAID5
Disk in Slot 3 - Predicted Fail - status light blinking green to amber, back to green to amber..
NO IDRAC in this server
Host OS - XenServer 6.2
VMs - 1 Virtual Machine running on XenServer

Using MegaCli ran the following command to force the drive offline
./MegaCli -PDOffline -PhysDrv [32:3] -a0
(returned that drive was offline)

Verified drive was offline by running
./MegaCli -PDInfo -PhysDrv [32:3] -a0

*** NOTICE LINE BELOW THAT SAYS Firmware state: Offline ***
Enclosure Device ID: 32
Slot Number: 3
Drive's position: DiskGroup: 0, Span: 1, Arm: 1
Enclosure position: N/A
Device Id: 3
Sequence Number: 3
Media Error Count: 21
Other Error Count: 0
Predictive Failure Count: 34
Last Predictive Failure Event Seq Number: 17284
PD Type: SAS

Raw Size: 279.396 GB [0x22ecb25c Sectors]
Non Coerced Size: 278.896 GB [0x22dcb25c Sectors]
Coerced Size: 278.875 GB [0x22dc0000 Sectors]
Sector Size:  0
Firmware state: Offline
Device Firmware Level: 0008
Shield Counter: 0
Successful diagnostics completion on :  N/A
SAS Address(0): 0x5000c50048669fa9
SAS Address(1): 0x0
Connected Port Number: 3(path0)
Inquiry Data: SEAGATE ST3300657SS     00086SJ3FV95
FDE Capable: Not Capable
FDE Enable: Disable
Secured: Unsecured
Locked: Unlocked
Needs EKM Attention: No
Foreign State: None
Device Speed: Unknown
Link Speed: Unknown
Media Type: Hard Disk Device
Drive Temperature :36C (96.80 F)
PI Eligibility:  No
Drive is …
Hi there,

this is a very simple question. What's the Dell utility that allows you to monitor the state of the server, including HD status..?

the point: i worked on a new client the other to replace a HD in a raid system, it was a Dell poweredge t130 i belive, it was running windows.  The utility was loaded on the server and one of the office person logged in into it for me, i was able to see the faulty HD id, sn, etc..

we're replacing that sever but i don't really remember the name of the Dell utility they had me use, i found it so useful that i'd like to purchase along the the new server.

Your help is greatly appreciated..
Hi, I use Dell PowerEdge 2950, controller is PERC 6/i integrated
In OMSA web interface I see a warning related to one of my two virtual disk.
(some times ago I replaced one disk, probably I was not aware that rebuilding failed to start!)

What is correct process (see attachment) to fix this warning ?
In "available task" I have only blink , unblink.
I have one Volume- VOL1 raid 5
Supermicro Server running 2008R2
System Repair does not see an OS listed and I do not have a system image.
I have run diskpart in the command prompt and it only shows DVDROM
Desperate to get the data on these drives. oldest backup is 15 days ago
Hi all,

We've got a server that has a RAID 10 on there and have partitioned the volume into 2, one partition has the OS on it and the other has the data but we've put in a RAID1 pair of SSD's so i was planning on creating the RAID and then cloning the OS onto the new RAID but then how do i get the server to boot from the new drives instead of the current partition ? It's a Dell Poweredge running 2012 R2 ?


We have an new LSI mega raid 9341-8i. This card comes with 2x internal ports. 8643 SAS ports. We need to connect 24 Drives to the card. However we are connecting theses drives through a backplane.

The card says it can connect up to 32 drives in a RAID configuration. How can we connect more than 2 banks of drives using this card. Can we use a SAS Expander and how do we go about doing that?

We recently started getting a bunch of fatal errors listed on our main server's RAID.  checking the status it shows as no errors and system is optimal, but these errors keep showing up and once I started a consistency check it started listing a bunch more.

not sure what to do next as these errors don't tell me much....

and am I at any risk of losing data at this point?


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My client has an HP Proliant ML350G6 server. OS is on a pair of mirrored 145GB drives. Data is on a RAID 5 array of 1TB drives. The OS drives are getting really full after years of updates. These are 2.5" SAS drives. What would be the best way to get the OS on to larger drives short of a new server? Is it even possible? OS is Server 2008 R2.
I operate the HP dl 390 G9 and window server 2012.
the existing server operated as raid0 and logical drive 1. and add 4 more disk(1.2TB) as raid 5 for file sharing. now I can use HDD capacity as 2.4 TB. because 3 hdd operate as raid5 and the last one is how swap. then I can use it 2.4 TB, is it right?
and my question is after raid5 setting, I can see the alarm message "Background parity initialization is currently queued or in progress on Logical Drive 2~~~" then what do I do?
Just reboot the server and format the drive on Window server? or Do I start initialization? how to start it? I can found any menu relate with it
Hello All,

I am currently setting up a Dell server. I am now in the process of Deploying an OS utilizing the "Deploy OS" option in the life cycle controller and it let me select between UEFI and BIOS. I am aware that UEFI has a lot more options than BIOS, but I am not sure if it will work well in my situation and with the configurations that I have been task with. Some of the configurations that I have to perform are the following:

1) Harden the BIOS by securing it with a password

2) Configure 2 virtual disks (both configured with RAID 10) one for OS and second one for data. Both disks ending with 1.7 TB and 10 TB respectively after the RAID 10 configuration.

so with the requirements stated above, I am left with the questions below:

- if I decide to choose UEFI, can I harden UEFI with a password as I can do with BIOS?

- and if I decide to go with BIOS, will it support the size of my drives?

Any help will be appreciated.

Thank you!
I have a PE T320 with a PERC H310 controller.

We have a RAID 10 setup with 4 drives.  One has failed.  How would I replace based on this picture?  The pic is the back of the PE.

Back of a PE T320

I have 4 drives from our server that was configured in a raid 5.   i want to format this drive on my pc but it is not recognized.  I already went into admin tools and looked for the drive and still does not show up.  they were active in the server.

Hello all,

I've inherited a PowerEdge T320 that utilizes a Dell PERC H310 RAID controller.

How would I go about checking the status of the RAID/drives?


RAID stands for Redundant Array of Independent Disks.

RAID is data storage technology that allows multiple drives to be used together as a single virtual drive for reasons such as fault tolerance, reliability and performance.

There are several different levels of RAID that determine how the data is stored and the level of redundancy achieved across the drives.