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 server with raid card megaraid SAS 9265-8i and when I created a Raid 5, one of the new hard drives failed and then I replaced the hard drive with other new and after rebuild and pass a week the same bay failed with the new hard drive  any suggestion why always the same bay ?
We are running the HP smart array Configuration Utility but it is not picking up any Raid cards

We are running ACU version
The raid card is a Smart Array P410i controller driver version
The server has all windows updates installed
The server is an HP ProLiant DL370 G6
The server has been restarted several times.

Does anyone have any suggestion on how we can get the Smart Array Configurator to show the Raid controller
How I can create Traditional RAID 5/6 on IBM V5030 SAN Storage?
I have a PowerEdge 2950 that we just upgraded to ESXi 6.0 with some performace issue
I also have a PowerEdge 2900 (older) that is running the same ESXi 6.0 version without any problem.
RAID adaptor is the same (Perc6i integrated)
HDD type are identical (300 Gb 15krpm SAS 6 Gbps)
Raid level is identical (Raid5 5 disks)
Memory is the same 32 Gb
Processor are a lillte different
2900 has two Intel(R) Xeon(R) CPU           E5430  @ 2.66GHz
2950 has two Intel(R) Xeon(R) CPU           E5405  @ 2.00GHz

Disk write/read on VM to local disk are twice as slow on the 2950 than on the 2900
Network speed is 10 time slower on the 2950 that on the 2950
Network speed is better with the E1000 adaptor that with the VMX NET3)
Firmwares were updated on the 2950 (no change in performance)

Any idea ?
Symptoms: Slow network
I am trying to delete a logical drive, when I select f8 i get the following notice.
Note: For more configuration options use HP smart Storage Administrator or ACU press <ESC> I cannot see any whay to access SSA or ACU
I have a Dell PowerEdge R510 (Windows Server 2008 R2) and I have a predicted failure on a hard drive.  Currently my Raid 5 (PERC S300) is listed as normal.  My question is... can I hot swap a new/refurbished HD or do I need to go offline?  Also, if my Raid has a normal status what will happen with my Raid once I remove the bad and replace with a good HD?  Will it automatically start rebuilding using the new HD?
We have server ML350G9 with SmartArray 440ar with 5 disk in RAID5 . We have add 2 HP SD WRITE INTENSIVE 480GO in RAID1. The benchmark IOPS test are slow. We have done test with Cache On/off and with SmatPath On/Off. We never reach more than 10000 IOPS !

Do you know what's happened ?

Hi Guys,

Which will be the best RAID configuration to run on a server with 2 x 1Tb drives as well as 2 x 2Tb drives?
Windows can not be installedRAID Driver Download Page from HPW2012 Driver FilesBrowse to Driver FolderNo Signed Driver FoundHi,
 I have HP Proliant ML310 with HP Dynamic Smart Array B120i SATA RAID Controller running Windows Server 2008 R2 OS and am trying to upgrade this to Windows Server 2012.
 I downloaded W2012 ISO file into W2008 OS desktop and ran Setup.exe from C:\users\User1\downloads\W2012 folder. During the install, I saw the message saying "Windows can't be installed on drive 0 Partition 2 because of "missing driver". I assumed that it was looking for Windows 2012 Driver for B120i SATA RAID Controller. I downloaded W2012 driver files  from HP website ( and pointed to the folder (where I extracted driver files), but it says "No signed device drivers were found".

Have I downloaded wrong driver?
Do I have to boot from the W2012 OS CD and supply the W2012 RAID Drivers via USB Stick?
I thought I could run Setup.exe right from W2008 OS desktop.

Thank you for your help in advance!
Our file server (Win Server 2012 R2, soon to be migrated to 2019) has a single share (on a RAID) that is now over 3TB in size and it keeps growing. Since it's a VM I can easily expand the VHD. However, I am approaching the storage capacity of the physical hard disk on which it lives. Splitting up the share is not an option, as the entire organization uses this file server and UNC paths to files are used by everyone. I am considering just moving the entire VM to a larger RAID, but having a single 3TB VHD worries me. What is best practice for large file shares? Any recommendations? (I don't have a SAN. I'm happy with the performance of the Hyper-V VM)
Had our server Raid array fail and this had the key, how can I restore without they key

We are in the process of building a new server for all of our vessels. With the G8 DL380 we used all mechanical SAS drives in a raid 1 config with 2 arrays.

In order to duplicate the server (all our vessels run the exact same server) we would simply switch off the server and remove slots 1 and 3, place them in the new server and boot - no problem, worked every-time as long as you pressed F2 to accept that there was drives missing from the array. We would then put new drives in and mirror both arrays before being able to repeat the process.

Now with the new Gen 10 its not so simple it seems. When we have the drives in the new server it will recognize the the arrays, if we go into the array controller we can see that its aware of the missing drives and presumably would mirror OK however we have not tried. The problem is that it will not boot, even if we set what the boot volume is in the array controller. If we try to use Hirens boot USB with the array controller driver added it will see the SAS SSD (boot array, we use SSD for boot as the vessels need faster boot times in case of emergency) however the disk is not initialized and wont. The mechanical SAS is seen with a volume but its not accessible.

Does anyone know what process we should follow to move the array? We are making sure the source server is fully shutdown before we take disks 1 and 3 out. The drives are new HP drives. The process has been tried twice. Hirens boot USB can see the volume's OK on …
I have a HP ProLiant DL360 g8 (2 processors, 64GB RAM, 2x quad port Gigabit LAN cards, and a HP P420i RAID Controller that can handle all RAID configurations including Raid 6 because of the Advance License) that I am upgrading to server 2016 enterprise edition from SBS 2011. I have 8 10K 900GB SAS drives that I would like to configu workre in a RAID configuration with various volumes built on top of the RAID array(s).  I am taking 6x 300GB 10K SAS drives out of the machine (to be used else where as needed).

The server will host at least 2 hyper-v VMs's - one to host exchange 2016 and the other as a file/app/web server which will require SQL Server Professional to run on the second VM. There might be a third VM to host sharepoint but this might be hosted elsewhere.

Additionally, I have an external raid array in a standalone device that is connected to the server via USB 3.0.  I also have 2 1TB SSD drives likethat I would like to attach the server via a dual USB drive cradle connected via USB 3.0.  There are also multiple USB 3.0 8TB external hard drives that are connected to be used as drive/data backup using Windows Server Backup (differencing backup running at least 1 but probably twice a day with replication to a remote off-site QNAP as a backup several times a week).

What is the best raid/volume confugaration for this setup. The Raid card does not have the optional battery installed.

OPTION 0: Should I do 4x 2-drive pairs in RAID 1, each for a different purpose …
I have a PowerEdge T610 with a Perc 6/i Integrated controller. when i look at it in Open Manage i can find the predictive failure drive and have i identified it by enable blinking on the drive. but i can't tell if it is a RAID level drive so i can replace it without shutting down the server? OpenManage shows 2 connector(s) the first Connector 0 RAID has 4 drives 0:0:0:0, 0:0:0:1, 0:0:0:2 and 0:0:0:3 all on line and good status. the other connector, Connector 1 RAID only shows 1 drive ID: 1:0:4 Physical Disk: Status show Non-Critical.  Drive details below. what i am trying to figure out is, is the drive part of a RAID array? Seem odd to have 1 drive sitting by itself not as part of a RAID.  Also, what data is on this specific drive?
in the OS Disk Manager is shows.
Disk 0  basic, Online and it has System Reserved and C: 323.15 GB NTFS (Boot)
Disk 1 Basic, Online and D: 930.50 GB NTFS
ID 1:0:4
Status Non-Critical
Name Physical Disk 1:0:4
State Online
Bus Protocol SATA
Media HDD
Failure Predicted Yes
Revision 1AJ30001
T10 PI Capable No
Capacity 465.25GB
Used RAID Disk Space 465.25GB
Available RAID Disk Space 0.00GB
Hot Spare No
Vendor ID DELL
Serial No. S2B6J90ZB04626
Part Number CN06R63F695180B701ISA0
Sector Size 512B
SAS Address 1221000004000000
3ware raid 5 assigning wrong unit number to replacement drive
Dell PowerEdge T320 H310 RAID controller does not recognize all physical drives?
I have two identical T320 servers with Perc H310 controller. I'm trying to add an additional RAID 1 virtual drive for data partition. I purchased compatible drives for this server and installed then. When I enter the controller BIOS I only see drives 0,1 and 3 don't see drive 2. Both servers are giving me the same result. I thought it may have been a defective drive but I was able to eliminate that theory. I have updated both servers to the lasts BIOS, iDrac and controller firmware's. Any thoughts?
We have a PowerEdge R410 with a PERC S300 Raid Controller.  We had an issue with one of the drives not being recognized by the Raid controller, so we decided to rebuild the RAID and reinstall Windows.  The RAID appears to be set up fine in the card, but no OS installation is able to detect it.  We've tried Windows 2012 R2, Windows Server 2016 and Linux, but none can see the virtual drive.  Any suggestions??
hi experts:

intel rst is monitoring  the PC with raid 1.

how to remotely get the report / health information?

powershell / wmic , etc are welcome.

no vnc / rdp to screen dump, please :)

I have HPE ProLiant DL380 Gen8. 8 HDDs with RAID 1+0 configured. Hdd at bay 1 corrupted. Mistakenly unplug HDD at bay5. Then BSOD BAD_SYSTEM_CONFIG_INFO error appear. Please help.
RAID StatusHi,
I have DELL PowerEdge T320 Server with three 600GB SAS HDs. First two HDs are in RAID 1 and third HD is a hot spare.
Current light status is as follows:
1st hard drive (Physical Disk 0): Foreign (toggling between green and amber)
2nd hard drive (Physical Disk 1): Failed (blinking amber)
3rd hard drive (Physical Disk 2): Online (blinking & solid green)

I understand that 2nd hard drive is shot and needs be replaced.
But what does "Foreign" mean in 1st hard drive?
Is it fair to say that only 3rd hard drive is keep the system going at this point or 1st hard drive and 3rd hard drive is being mirrored?
Can anyone suggest an exact model of raid controller card (along with web purchasing link) that I do not have to reflash and is ready to use with my HP z800 workstation/server:

It needs to:

be compatible with vmware ESXi 6.7?
support at least 4 sata/sas drives with 6.0Gb/s transfer speeds
meet my budget of 200$ or lower

I am looking to use sata drives with the controller card to configure 2 or 3 - 2 TB drives in a raid configuration - considering this drive potentially:

However i am not sure on which raid level to choose - i know it will have to be raid 1 or 5 but am not sure which one to choose. I would like the option to potentially start with 2 or 3 - 2 TB drives in some raid configuration but then add more disks as i could afford them. What raid level number would be best to achieve this functionality? Or is adding drives after the raid is built not even an option with raid?

Thank you for all your time and effort to answer my questions. I really appreciate it!

We have a client who is using NAS QNAP TVS-882 with 5 drives(6TB NAS DISK EACH) configured in RAID 5.

She uses this to edit videos from her PC. The main problem here is when she edits the video, video lags and becomes slower than editing a file from a local PC directly.

She only uses one SSD as cache pool.

What would be the best solution to improve the read/write performance?

Would it be possible to add two SSD into RAID 1 and keep the RAID 5 with existing HDD? Then create a logical drive for only current editing files in the SSD. Keep the nonediting files in the RAID 5?
Hello, I am trying to extend my C:\ drive on a server that is running RAID1 on a dell FC630.  It’s a hardware raid that is a Dell PowerEdge RAID Controller H730 and would like to just replace one drive at a time and once the RAID rebuilds go into the controller and extend the disk.  Can anyone tell me if there is an issue with this? This server is a SQL server that is clustered with two nodes and running Windows 2012 R2.
Thanks for any and all advice.
I have a client that has a Dell PowerEdge T420 with Perc S110 Raid controller. This server has Lifecycle Controller 2 on it. The os is Windows 2008 R2. There was a power outage and when it came back up it went into recovery mode. It won’t repair when I do the repair. I can go to the command prompt and it shows x:\windows\system32 If I try to go to c: or any other drive letter it does not exist. If I do diskpart and do list disk it shows no disks list or the same on list vol. But I can click F8 on boot up and get the normal boot menus, I have tried safe mode, command prompt only, boot log, and last good boot nothing works. It looks like it’s going to boot even has black screen with mouse that you can move around then it reboots. When I go into the raid controller it shows all disks online. I have also tried to but from Windows 2008 r2 and windows 2019 server from usb and it does not see any disks. Does any body have any Ideas?
I am in the process of setting up HP Proliant Ml110 G7 Server. I am a novice at this and would appreciate some help. I just had a rAID 0 setup and lost three of my hard drives. I am using my server for streaming movies. I wil be using Esxi VMware-VMvisor-Installer-6.7.0.update02-13006603.x86_64 and Windows Server 2008R2.   I have 4TB HDD and four bays in my server. I was told to use a RAID 6 but my HP only has RAID 50, 5, 1+0, and 0. I would like to install ESXi on to a USB drive and have the server use this to boot off. Is this possible. If someone has instructions on how to setup from beginning to end that would be appreciated. I am even willing to setup live.


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.