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 would like to purchase a NAS box  for additional storage for use in a small business. I would like  about 40 TB of hard drive space. and would like to  to have the hard drives  configured with RAID to limit hard drive failure

Can someone give me some recommendations ?
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I have a Dell T410 server with Perc s300 raid using RAID 1.  There was a failure of one drive and the other is degraded.  I replaced the failed drive because I only had one spare available.  In the boot utility (Ctrl-R) I configured the new drive as a hot spare.  When I rebooted and hit Ctrl-R again I see that the Virtual disk is listed as degraded but both drives are listed as hot spares.

I can still boot to Windows Server 2008 R2 and in Open Manage Server Administrator the Virtual Disk name says NONE and status says Failed.  The only task available is Delete.

Under Physical Disks 0:0:0 has a state of Degraded with failure predicted YES and 0:0:1 has a state of Online with failure predicted NO.  For both the only tasks available are Blink, Unblink and Unassign Global Hot Spare.

The system is running but there is a bad sector in the middle of my SQL database.  I cannot perform a successful backup using the installed Shadow Protect nor can I get a successful database backup using SQL Server.

Yikes - I've ordered 2 additional drives.  How can I proceed with having Server Administrator recognize my the Virtual Disk so I can initiate a rebuild.  It's unclear whether or not the 2nd physical disk is actually functioning as a hot spare.  I did try booting with only the second drive and that failed.  I'm concerned that if drive 0 fails I'm SOL.

I'm looking for very specific advice applicable to this situation and the details described.  Please no woulda, coulda, …
I have a Areca ARC-1883ix-24 RAID card with 2 Gigs of Cache. I am using it in a RAID 5 configuration on a NVR system running Avigilon Control Center (NVR Server Software).
I am having issues with playing footage in reverse although things are working fine otherwise.
This is a personal build of the server. I did this because a server from Avigilon cost somewhere in the 50k range and I built this for about 3k
I am using 8 4GB 6Gbs dirves at 7.2k speed.

I am curious about improving read performance of the array.
Will the Cache help? ie. Write Back.
Is it worth upgrading to 8 GB of cache if the above is true?
Is there anything else I can do other than running a RAID 0 setup? Although I might consider doing a test with RAID 0 to verify the system is capable of playing footage in reverse without issue.
Will upgrading to 12Gbs drives help this issue?
Could the back plane be causing issues? (the case is a piece of junk and has a built in back plane. Norco RPC-4216)
Is there anything else you can recommend to help this issue?

Dear Experts,

I have 13 Lenovo SR650 servers.

I tried to run Acronis and of course the hard drive could not be detected.

What type drivers do I need to run on the acronis is it raid drivers or hdd drivers?
Hello There,
I have Server DELL POWER EDGE T620 IT HAS RAID 6 AND WORK very will.
 I need create mirror for this Array Raid 6.
So i poet this steps :
1. I will buy The new H.D The same size and the same type .
2. i will take out the old hard drives out the server, that already has OS system and
     Application    and data.
3. i will BUT THE NEW HARD Drives on the server, then i will   build the same RAID .
 When i finch build the array RAID for the new hard drives i need retainer the old H.D to the same Server , this time the Server it has the old hard drive and the new drive,
NOT:  a)the old hard drive It has (windows SERVER 2008 R2, AND APPLICATIONS , and data)
     b)The new H.D  it has the ARRAY
2)IF THE server run the window shod see the virtual HARD DRIVES AS UN LOCATE SPAS?
code i create mirror on this vertical  hard drive ?
All i need just i need the new shards as backups for server any time the system crache      

please can you help me ?
When I open Dell OpenManage Server Administrator, it is correctly showing the inventory of the server, except for the physical and virtual disks on the machine. Instead, it is showing me the physical and virtual disks and RAID-5 array on a DIFFERENT machine. I have tried opening OMSA with localhost, the IP of this machine and its name, I have checked that NSlookup is only reporting the IP of this machine. Is there some way to force it to check the inventory again? I have uninstalled and reinstalled twice now.
We have a HP ProLiant DL360 Gen9 with raid controller Smart Array P440ar which supports SATA and SAS
There are four 2.5" SATA hard drives attached. each two of them are configured with raid1.

The backplane has 8 bays, so I have another 4 bays to use.
My questions is can I use 2.5" SAS drives for the reset 4 bays. my understanding is the physical interface for SAS and SATA is different. I checked all the 8 intereface they all look the same.
Please advise.

Many Thanks

I wondered if anyone out there has ever successfully added a Dell MD1200 attached storage device to an existing PowerEdge host running Hyper-V Server 2012.  As it’s Hyper-V Server, there’s no GUI, so OpenManage isn’t obviously an option.

Currently looking at accessing the basic ACU at boot, but struggling with this also.

Does anyone have any thoughts, or ideas?
We are building a 3 Host ESXi Cluster and are looking at the HP MSA 2052 Array with the Automatic Tiering. We were looking at populating it with the Following Drives
2x400GB SSD RAID 1  - Performance Tiering to 15K
2x400GB SSD RAID 1  - Performance Tiering to 10K
1x400GB SD Global Hot Spare
6x1.8TB 10K  RAID 6
13x600GB 15K RAID 6

1x1.8TB 10K Cold Spare
1x600GB 15K Cold Spare
All would be combined into One Drive Pool. (or?)

There will be 9 VMs at the Start and up to 26 VMs later. We would add a Drive expansion Chassis to the MSA at that point.

On Datastore Creation, does it matter if you create one Datastore or multiple Datastores if they are all coming form the same Drive Pool and all three hosts are part of the same Cluster and will be responsible for the same set of VMs?

Its about 12TB of storage if you don’t include the (2) 2x400 RAID 1 (if they are used really only for Movement of Data vs actual Storage?

Just in terms of ESXi, is there any Benefit to have multiple Datastores mounted from the Same Drive Pool?  Or should we have one LUN, vs 3 LUNs from the same Drive Pool?

DL380 G7 - Raid Config

I have a DL380 G7 with 8   2.5" slots. I have 6 drives configured Raid 1+0 (raid10) with a spare totalling 7 drives currently connected.

Problem trying to solve, is I want to add more space. My questions are below.

Can I somehow stop using the "spare" drive and pop two new drives in and have them on their own array? I have 2x 2TB drives I would like run in raid 1.
If so, how do i do this?
Can it be done without losing any data?
Can it be done without shutting down server
Does it matter that the 2x2tb drives are different to the others?

This server is a virtual host.
The main array has OS/ Exchange and the new room i want to use will be fore other VM's

Any help much appreciated.
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I have a Poweredge T110 with Perc H200 controller.  It's running RAID 1 with 2 600GB 15K SAS drives.  One HDD1 failed so I bought the exact identical 600GB 15K SAS and installed it in place of the failed HDD1.  I held Ctrl-C to go into the controller boot menu and saw both drives and it said that the RAID was degraded.  From dealing with Perc controllers in the past, I figured that I could boot into Windows 2012 R2 and go into Openmanage and make sure that the RAID is rebuilding--at least when I'm working with RAID5.  It still shows the RAID is degraded in Openmanage.  Here's what I'm seeing:

The available tasks are Delete and Change Policy...

I don't even see the second drive anywhere in Openmanage.  The available tasks for PERC H200 are create virtual disk and reset configuration.  I'm not sure where to go from here to setup the second drive as the second drive in the RAID1.  Thanks in advanced for your help!
New TS-412 raid 5 with 4x2tb enterprise drives. Initialization went well, even started installing some apps. about 24 hours in drive 1 reported some errors, I replaced the drive, it came up and the errors were gone. Now I am in degraded state with all 4 drives being seen but the raid reports 3/4/5 online and that I need t install a drive in port 1. Volume manager shows all 4 drives up and good and ready. However logical volume in degraded state file system ext 4. Raid management also shows in degraded state,  however I can do nothing from that page.
A couple years ago I purchased two used Adaptec 8805 RAID controller cards off of eBay and just started using these controller cards two months ago.

Both controller cards keep beeping non-stop while being used even though I have changed and used different known good working hard drives.

These controller cards are unable to maintain RAID 1 or RAID 5 arrays and while they have individual hard drives connected to them (in non RAID arrays) they also don't work properly and say that the hard drives connected to them are degraded.

I want to contact Adaptec tech support to have these two RAID controller cards replaced but first I want to be sure that they will fail whatever tests Adaptec requires that they fail in order for them to be replaced.

So what utilities or other programs can be downloaded or used to prove that these RAID controller cards are indeed defective?
We have an HP DL380p G8 with a 5 disk (5x300GB SAS) RAID that is showing one drive as 'predictive failure' with AMBER light flashing on that drive. The Array configuration utility (see screenshots) confirm this is the case. Now most drives I have to swap out are usually failed (solid AMBER light) and I can thus hot swap them whilst the server is running. Can I actually hot swap this one even though it has not failed yet or do I need to shut down to do it or mark it offline/disable in the array? A replacement drive is on its way.

I have a Synology DS412 NAS that is 93% full.  I have four 2 TB Western Digital Red Drives configured in a single RAID 6 volume with an effective size of 4 TB.  I want to increase my storage capacity by replacing the four 2TB drives with two mirrored 8TB drives.  

I do not have enough room on my server or on any PC to copy the 3.5TB of data that is currently on my NAS.  So I have a separate, brand new WD 8TB external USB3 drive I want to use as a temporary place to store all my data.  My plan is to

1. Backup my NAS to this external drive
2. Backup my current NAS configuration file, just in case
3. Pull the four 2TB drives from the NAS (it is hot swappable but I will likely do this with the NAS powered down)
4. Install two 8TB drives and set them up in RAID1 mirror, create volume labels and user accounts
5. Copy my backup from Step 1 to the new NAS.  

The trick is I need the files in the end to maintain all their original attributes including security, ownership, date stamps, etc. I do not want to lose any files (including hidden or system) and want all dates and paths to match the original.  I also want to be sure I did not lose anything in the transfer.

In an attempt to do this using another external HDD I ran CMD from my server as an admin and used the following syntax:

"C:\CopyRite XP\robocopy.exe" \\\Source\ F:\Destination /V /TS /S /E /COPY:DT /XA:HS /ZB /NP /FFT /XJD /R:1 /W:2 /DCOPY:T /LOG:"C:\1Robo\Pdrivelog2.txt" /V /TEE

PowerEdge t410 has a degraded virtual disk. One of the drives are showing faulty on the lcd screen on the server. I have the disk to replace. Do I need to use openmanage to rebuild the array to healthy? if so do I load openmanage on the server that has the failed drive.  or the RAID controller bios setup? A walkthrough guide would be great. thanks
We have two Dell EqualLogic PS6110VX storage arrays that we purchased second hand approx. 9 months ago.  As such they are not covered by Dell’s warranty / or support.  One of the units has crashed, as detailed below, and I’m not sure if it's recoverable.  

I would value your input to if this can be restored without data loss or if we should cut our losses,  re-initialise the unit and start again?

And YES, happy to pay for your time via the "Live Mentor" option if you know how to get this unit back online without losing any data.

The storage array has 24 * 600GB, 15.7 drives.   22 drives are mounted in one big Raid 10 array and with 2 hot spares.
Last night within a 15 minute period, 3 drives failed.  (What are the chances, hey?)  The failed drive numbers are 8,15 & 23.  We replaced them this afternoon with official Dell drives (firmware EN03).  The system has recognised the drives but has not started the automatic rebuild.

The disk lights on the front of the unit are all solid green and a red light is flashing in the top LHS of the unit

If we go into the CLI console via Putty and a serial cable and run the “su raidtool“ command.  It displays the following:


Driver Status: *Admin Intervention Requested*

RAID LUN 0 Faulted Beyond Recovery.
  12 Drives (0,2,17,7,9,1,4,6,?,?,11,12)
  RAID 10 (64KB sectPerSU)
  Capacity 3,456,711,524,352 bytes

raid status …

I made the mistake in installing most recent RST on an older Intel S3200SHV Server board with Intel® 82801IR I/O Controller, evidently all hell broke loose as i got spinning dots at reboot. In order to address the issue I set the controller to IDE after unplugging one of the drives. I did some research and apparently version is the latest one that would work with this legacy controller, can anyone please confirm this and if so, how can i go back to my RAID setup if the server no longer boots when set to RAID (Latest RST has already been uninstalled).

Your suggestions are greatly appreciated
Hi All,

What could be best option for viewing RAID configurations in x3635 m3 / m4 , x3400m2
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I have an IBM server x3500 and I have problem at boot with it. When it boot , at the RAID controller init, it Write 'Controller manager initializing...' for 15 minutes and after it write 'Controller manager failed'.

As I saw the controller look like a RAM dimm. The controller is an ATB-200 from Adaptec (FRU:25R8076). As the description from IBM and other sites,  it is the whole controller but many told me that is only cache memory.

I already order a new one but I'm not sure it is the problem. When I take it off, the computer does nothing and the diagnostic LED stuck at CPU.

My question is, if the new controller failed, is there any other SAS adapter that I can buy, used or new, to replace my ATB-200 that I can install without delete and reconfigure my existing array? I have a RAID 1 array and a RAID 5 array. Motherboard has pci-e X8 and pci-x connector.

Thank you!

We have a Dell Precision T7600 with a PERC RAID card:

Screenshot #1
We have set it up based on this screen shot below:

Screenshot #2
However, when we go into Windows (this is a brand new install of Windows Server 2016 Standard) it shows up like this:

Screenshot #3
After doing a ton of research I can't figure out for the life of me what I have done wrong.
I have a windows 2012 server that is running out of space on the F drive, I see that I have 185Gb unused in computer manager and was hoping to extend the volume.
As you can see from the picture, this is grayed out. How can I extend the volume ?
This is running on 6 x 600Gb SAS on a raid 5, 1 of the drives is spare.
Please provide me with a list of third generation PCI Express RAID controller cards that are fully compatible with an Intel S2600cp server system board and Server 2016.

This Intel S2600cp server system board is running the latest BIOS (Intel® Server Board S2600CP Firmware Update Package for EFI Version: 02.06.0006).

Attached are the manual and technical specifications for this server system board.

Please let me know if any further information is needed.

a company that we use for back up installed their software, after a reboot our HPE gen 10 server will not boot back into Windows.  The boot cycle eventually ends up with the Choose an Option (continue/troubleshoot/turn off) screen.  ALL choices lead to a reboot.

the server has a raid 10. Looks like it is configured correctly.  When I look in the Marvel Bios utility, there is no indications of disk failure.

When I put  a bootable windows server usb and try to boot/install/repair it takes me back to the choose an option screen/reboot.

I was called into this office tonight.  There is no backup.  They have important data on the server. They need to be open for business on Monday.

Can someone give me suggestions?
We are migrating to RHEL 7.  We will be using SAS SSD drives with an LSI/Avago hardware RAID 10.  The RAID stripe size is 256K.  The RAID 10 has 8 drives (4 drive stripe).  We will use LVM, with an XFS file system.

I would like some specific advice on doing the LVM creation, and XFS creation, in the most optimal way (especially read performance).


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.