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’ve had two PC’s have an issue where I get the error
From the RAID controller:

RAID -foreign configuration found all drives lost.

The 1st time, not being familiar with the error. I gave the user a new PC, thinking the HD failed.

The 2nd time, I imported the foreign configuration and all seems well.

So my basic question is, does the error:

RAID -foreign configuration found-all drives gone

Mean the drives or controller is failing or unreliable or something else?

Any insight into this issue would be greatly appreciated

Thank you
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Hi I wanted to use software mirroring to mirror a Windows 10 drive, system actually.  I'm going to use like a 250 ssd, don't think that matters.

I know the older version of windows didn't let you software mirror unless you had Ultimate, or maybee Pro.  

Question, Windows 10, what version comes with the mirroring capability.
I purchased a "YK838 - RAID Controller PCI-E SAS 2-Channel SAS6/IR PowerEdge R510 by Dell."

The Amazon URL of where I purchased this adapter from is here.

What kind of cable adapters will I need that will allow me to connect two Serial Attached SCSI (SAS) hard drives to this PCI controller card?
I have two disks in Predictive Failure on a Dell Poweredge C2100 (Using Open Manage 8.2). We got new SAS drives to hot swap in. I started with the Global Hot Swap (in Predictive Failure) and replaced it with the new drive.

At first it gave the Green Check Mark, "ready" and i could assign it to the Global Hot Swap in the Physical Disks Section but got the attached Caution message. It still allowed me to assign it as a hot swap but was not being recognized as a virtual Disk in the Raid Array. Prior to swapping we could see disk 12 in it's own "Global Hot Swap" section under the other 11 disks in the array.

When i tried the "Create Virtual Disk" and "Assign/Unassign Global Hot Swap" options in Virtual Disks it would not show up as an disk i could select.

When i went back to the "Physical Disks" section the new drive is now showing as "Foreign" and i don't see an option to reconfigure it.

Help is very appreciated.

I have a Dell R720XD running a Perc H710p raid card.

I am in the process of setting it up and want to ensure i can increase the raid capacity at some point down the line.  I have read the H710p user guide (attached) which states that if i use Raid 6 i can add more disks and do an online capacity expansion.

To make sure i have setup a Raid 6 using 4 x SAS drives.

I have then turned the server off and installed a further 4 x SAS drives (Same model and capacity).

When i then go into the raid config using either the OSMA or the CLI there is no reconfigure option or even tasks option as per the below link.

The server and raid controller are running the latest bios versions.

I have also attached a screen shot of what i see in the OSMA.

Please help, thanks

I have what I hope is a quick, easy question.

But not being familiar enough with RAID HD controllers, I wanted to check.

Currently I have a  Dell desktop with a RAID controller and an SSD.  The drive, for the user is nearly full, so I wanted to add another SSD.

What is the best way to add another SSD to a RAID controller so it adds to the  HD space available to the user.

I just wanted to confirm I don’t, somehow do something that combines the drives and clears the current windows install of the SSD already in place.

Thank you
We are setting up a new sql server in our office.  It is a Dell PE R440 w/ 32GB RAM and 4 Hot Swap 3.5" drive bays.  We have four SATA 2TB drives in each bay.  The system has a PERC H730 controller for RAID.  We configured a RAID 5 (3+1) with the last drive being designated as the Hot Spare.  The RAID configure without issue, just a little overhead which brought down the over volume size to just under 4TB.  We are using Windows 2016 Standard Edition.  We boot of the disk and start the install.  The problem is that when it comes to choosing the drive to install too, it shows two Drive 0 drives in the install.  One is 2048GB and the other is 1677GB.  I am assuming that is is due too a 2TB limit but Im not sure.  I know there is a way for the system to recognize the full 4TB but I have not been able to find that information out.  We upgrade the System BIOS to the newest version but still the same issue.  Could us some help on this one as we do not want to setup two separate drives for this server.
Intel Rapid Storage (C600+/C220+) series chipset sata raid controller problem.  I had a drive crash, so I replaced it, and it started rebuilding.
I come this morning, and there's an error, that my data is no longer redundant.   Not sure why or how it happened, but can someone point me in the right direction how to fix this?

Has anyone seen this issue before?

I have a client with an AMD raid controller and have configured RAIDXpert2 to send email messages from it. I have configured it to send over the internet to our exchange server 2016. The message gets sent but doesn't get to me. Looking at the Exchange server receive log I see the connection from the remote raid controller, I get Sender OK, RCPT TO: <my email address>, Recipient OK, then instead of the next line being DATA, I get RSET from the raid controller. The raid controller is on a Server 2016 server. It has to be something simple but I can't figure it out!! I have configured  RAIDXrert2 with no username or password and it is sending on port 25. (I can see the connection come through the Untangle box). I get email messages from other remote devices OK so I am puzzled.

Extra Info: The same server uses Cloudberry backup server and is emailing me every day.
Everything I read acts like I can add 2 extra drives to my below server, then use Dell OpenManage Server Administrator (OMSA) Software "RECONFIGURE" to add these drives to my existing 1 array after I do a FULL backup.

  1. Is that correct ?
  2. Anything else I should be aware of ?
  3. Is it true that if I was running RAID10 instead of RAID6 I would need to delete the array and rebuild from backup instead ?
Server = Dell PowerEdge R440
OS = Windows 2016 Standard
Hard Drives = HotSwapable, 1.2TB 10K SAS 12G
Disk Controller = Dell PERC H730P Mini, 10 slots ------- 4 slots have above drives ------- 6 slots are open ------- RAID6
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We have a PowerEdge R610 using PERC 6/i Integrated (Embedded) controller. There is a RAID 1 and a RAID 5 (3 disk). One of the disks failed on the RAID 5, So we purchased additional 300GB disks (1 to replace the defunct, the second to introduce as a hot spare).

The first disk was added successfully into the RAID 5 array. The second disk was inserted, and after trying to add it as a global hot spare, the status changed to 'foreign'. I have been unable to change the status from 'foreign'.

I have attached some screenshots to assist.
Physical Disk StatusVirtual DisksStorage Dashboard
Can anyone assist with this please?

VMware ESXI 6.0.0 hangs when loading vpxa start.  I little background.  This customer had a problem in which some water got into the back of the server and killed the motherboard.  So I replaced the motherboard with the same model, it is a PowerEdge 610.  I swapped in the RAID controller, memory, and processors.  The system now boots up, sees all the memory and starts to load VMware.  However when it gets to vpxa start it just hangs.  I can ping the system but using a browser, nothing comes up.  Trying to login via the client, it times out.  I also tried SSH and it refuses the connection.  This is a small office and this is the only VMware system installed.  I have vCenter running as an appliance under this unit so I do not think it is loading.

I would like to get the server VM files that was running on this unit copied off if nothing else.  I can then reinstall VMware and reload it.  Any ideas on how to get into this system to try and fix it?
I received a E1810 Hard Drive 4 Fault. Review & Clear SEL on my Power Edge T610 server hardware display. This server is out of warranty, and is no longer support.

I am also receiving the following pop ups generated by Dell Open Manager:

         Predictive Failure Report: Physical Disk 0:0:2 Controller 0, Connect 0

      Predictive Failure Report: Physical Disk 1:0:4 Controller 0, Connect 0

      Command Time Out on physical disk: Physical Disk 1:0:4 Controller 0, Connector 1

I have 2 146 Seagate SAS drives configured in  a RAID 1 housing the OS - Windows Server 2008 R2, and 4 configured in a RAID 10 for data. It is the RAID 10 that is showing the failed/predictive fail drive.

I'm feeling all I really need to do is pull the bad drive (hot swap-able) and insert a new Seagate Cheeta SAS drive (same drive as original) to start an auto RAID rebuild. But, nothing ever goes that easy.  I would feel a lot more secure in my pursuit if I had expert advice.

Should I be safe and shut down to change the bad drive, then enter the RAID interface? Should I shut down, replace the drive-boot, then attempt the build from within the Dell Open Manger? Or, can I just hot swap the drive and let the existing RAID perform it's own rebuild?
Hi I have Dell t410 with 3 degraded raid 5 drives and their continually rebuilding.  After reading a few threads i thought i'd ask for some assistance.
Previously I swapped all 3 drives and was able to bring them to an online status. I've now installed new OS which is fine but the drives are continually rebuilding, taking resources and i'm not sure if the raid card is faulty or there's settings to reconfigure?
Can you help please, thanks Steve.
The user does video editing with Adobe Premiere on an iMac with Thunderbolt.
They are looking for a well-priced 16TB RAID 5

Would the following configuration be good?
  • Drobo 5Dt: 5-Drive Direct Attached Storage (DAS) Array with mSATA SSD acceleration - USB 3 and Thunderbolt 2 ports (Empty) DRDR5A21-T  (3.5 stars on Amazon)
  • Seagate 4TB IronWolf NAS SATA 6Gb/s NCQ 64MB Cache 3.5-Inch Internal Hard Drive (ST4000VN008)  (5 of these)

The cost looks to be about $1100.00

Is there another manufacturer that we should look at?
Any problems with Drobo?

I have a windows server 2012 r2 that won't boot that had a raid disk failure earlier this morning (7/30). The server rebooted and now it is attempting to install updates. It gets to roughly 50% and then fails with the error Error C0190003. Which states that there are so many update operations being processed that the transaction log becomes full and can't finish updating. The workaround is to change the transaction log limit in CMD, but the server won't boot into safemode with CMD.  I tried Last Known Good Configuration as well and it attempted to install the updates again and failed.

I am working on  a HP ProLiant 580 Gen9(rhel 6 is the loaded os) I am trying to eject a SAS SSD safely while using the ssacli command line utility. I have the single drive configured in a RAID 0 Array w/encryption. I am basically just trying to unmount the disk while the server is turned on so that I dont receive any health errors and the do not eject light turn off.

Is there any command to be able to achieve this through ssacli
I have an HP DL 320e that won't get past post. After a recent planned shutdown, it just won't restart. If you push the power button, the system attempts to start and then stops right away and the red health light blinks quite fast.

We read some support articles on HPE's website and attempted some fixes such as swapping out the power supply, the power cables, trying a different power outlet, etc and the power supply doesn't seem to be the issue.

We have another server that is the exactly the same and with the same Raid setup but is performing a non-critical task. The Faulty server has a Raid 1 setup with hard drives in Bay 2 and 3. The working identical server has a Raid 1 setup with hard drives in Bay 1 and 2

My question is can I just swap the hard drives between the two servers since they have the exact same Raid 1 setup and are the exact same server?  I don't think its that easy but wanted to check before attempting my next step of swapping out the motherboard.
HP ProLiant ML350 Gen9 Raid issue.


Windwos 2012 R2 Server
Was hot swapping some drives to determine if bay was issue or one of the SSD's was the issue. Something glitched and there was an HP based BlueScreen that said something about there was a problem and we need to restart, but we are collecting some data first. After reboot the server cannot find bootable device.

The hard drives are detected in the raid. The following screens show the issues when in the HP RAID Controller screens after choosing F11 Boot settings:
RAID Controller Screen 1
RAID Controller Screen 2RAID Controller Screen 3
This last screen is my main question. If I cleick REPAIR. Accept data loss and re-enable logical drives(s) how much data are we talking about losing? Everything or just the last sync fo the RAID drives.
RAID Controller Screen 4
If this option will lose everything then is there a way this raid array/logical drive can be repaired without loss of the boot OS?


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Hello Experts,

I need to manage a partition in Proxmox.

I have Proxmox working with a SD drive 500 Gigabits.

I added a RAID 1 12 Terabytes disk volume for storage. I need to manage this RAID 1 volume and make it available for the VMs.  I need to partition the Disk and make it available for the VMs.

I am reading about a BIOS change for the VMs and also LVM management.

Not able to make sense of my Google findings:

In order to properly emulate a computer, QEMU needs to use a firmware. By default QEMU uses SeaBIOS for this, which is an open-source, x86 BIOS implementation. SeaBIOS is a good choice for most standard setups.

There are, however, some scenarios in which a BIOS is not a good firmware to boot from, e.g. if you want to do VGA passthrough. [6] In such cases, you should rather use OVMF, which is an open-source UEFI implementation. [7]

If you want to use OVMF, there are several things to consider:

In order to save things like the boot order, there needs to be an EFI Disk. This disk will be included in backups and snapshots, and there can only be one.

You can create such a disk with the following command:

qm set <vmid> -efidisk0 <storage>:1,format=<format>
Where <storage> is the storage where you want to have the disk, and <format> is a format which the storage supports. Alternatively, you can create such a disk through the web interface with Add → EFI Disk in the hardware section of a VM.

When using OVMF with a …
We have two new HP servers (HP ProLiant DL360 G9) with 3 SSD (Intel SSD DC 240GB S4600 series ) drives in each. I will be setting them up as Domain Controllers (to run 2016 standard). Normally our file servers, etc. those with many drives were setup using RAID 5 and our Domain Controllers with simple mirroring. However, as RAID 5 is now outdated and we only have 3 drives I thought of using RAID 1e since that seems to be the best and recommended option based on my reading (e.g., but could someone who does this a lot (we only build 3-4 servers a year and many are virtual) confirm this or make alternative suggestions with explanations. As always greatly appreciate expert insights and feedback.
Hi, I'm looking for a decent RAID card for around 200 or so.  I wanted a Perc controller, but not stuck on it.  I wanted to run RAID 5 with 3 drives and a 4th as a spare.  I just want it to have sata drives, I don't need the SAS connections, and I really don't want a battery, just something better than the onboard connections and software raid.

Thanks a ton all.
Hi. I have a question regarding a predictive failure on a RAID 1 drive on a Dell Poweredge T620. The specifics are that the T620 hosts 2 server VMs, and has a RAID 1 and RAID 5 array, A drive in RAID 1 indicated a predictive failure, and I'm wondering the viability of adding a new drive (NOT the same model as this server is out of warranty), that is a 600GB drive replacing this failing 300GB drive. Is it possible to plug in the new drive, initilize it via the BIOS, then set it up as a hot spare so that the array rebuilds itself using the new drive? If this is possible, do I have to manually use Dell Openmanage to tell the old drive to turn off (it seems to have options for that), or will it automatically rebuild the array upon detecting the failing drive? Thanks.

The main concern is if using a different drive is possible. Is using a larger one okay? I want to hopefully minimize downtime.
Hello, All.

Before I go any further with the RAID 5 configuration that I currently have set up.

What is the best array to run for a web server running?
IIS, SQL Server, Mail Server, etc...

I currently have 4 - 500GB drives in the ARRAY.

My RAID card gives me these options.

RAID 10,
RAID 50,

I have another server that will be brought into the network by the end of summer, and another server by Christmas.
So, whatever information I get here from this thread, will most likely be used across all servers.

Suggestions are greatly appreciated.
I am still somewhat new to Virtualization and I am currently in the process of upgrading/expanding my VM server farm. I was going through some documents and in of the documents it mentions that I should have a separate disk array for each virtual machine on a multiple virtual machine system.

My question is what do they mean? I have a 6 disk server and would like it to host 3 VM's. From how I read the statement above I should configure server into 3 RAID 1 configurations where normally I would configure either a RAID 5 or 10 then split the array into however many disks I need for the 3 VM's.

What is the correct way? Right now I have all of my VM servers configured as RAID 5 the chop up the array into drives for the VM machines


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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