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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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.
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Dell PowerVault MD1200 with 8 drives in RAID 5, (2 TB each) (2, 4 drive arrays).
There were 3 arrays but two drives simultaneously crashed so I pulled all 4 out. About 2 weeks later the whole system died. When you unplug it (and reboot the server too) and replug it in, it starts to boot, recognizes all the drives the the fans in both power supplies go FULL blast and REALLY loud.
The virtual drives are recognized by the OS for about 10 or 20 minutes until the system dies again.
Only thing I can find is on the back the EMM light is blinking amber twice at a time but I'm not sure thats it.
I've tried booting up with either one or the other PS plugged in, same result.

Hey guys,

Can I setup (2) Raid 1 on Dell SAS 6 controller?  It does not support Raid 5.  First Raid 1 would be for OS and Second, for Data.  The server has (4) 146GB drives.  Please advise.  Thanks.
HP Proliant BL 460c Gen8 server Disk Read/Write Performance.
Dear Experts,
I am looking for tool to check performance measurement of disk Read/Write speed on my HP Proliant BL 460C Gen8 server. Recently I purchased HP 1.6TB 6Gb SATA 2.5in MU-PLP SC SSD to speed up the server read/write but it has no difference as compare to other disk. When the disk was installed first time, it asked for disabling some cache setting in RAID configuration and than only RAID 1 was configured. The setting exactly I don't remember. Please guide how to check the performance of disk.
Hello Experts,

We have a Dell MD3260 storage array. on one of the two raid modules has a error battery status "Not Available".  The battery has been replaced multiple times and this error still remains.  No amber lights are lit on the raid controller.  Could it be the raid module its self that is the issue?    

Thank you,

Cannot see the Storage Section from the iDrac interface. I have seen other posts where users suggest "this is because iDrac is initializing before the raid controller", but there does not appear to be any solutions referenced. Can the sequence be controlled? Or is a firmware upgrade needed? 

If the latter, why would DELL ever create the system in a manner in which the iDrac could not see their own RAID controller?
About a month ago I placed in service a server with the Intel desktop RAID controller configured as RAID 10 using (4) 1TB hard drives. Install went perfectly but after a week the status on the RAID controller says initializing and it always stops at 16% (waited over the weekend - no change in initializing - still stuck at 16%.  Every time you reboot the initializing starts over and takes about 30 minutes to get back to 16%.  The Intel rapid storage manager also shows initializing 16% but it also indicates the RAID status is normal.  I know for a fact when I first delivered the server the RAID displayed optimal, not initializing.  Now, about every 4 hours the server becomes unresponsive and has to be powered off without properly shutting it down.  I have replaced the Ethernet adaptor in the server plus a new cable and a new desktop switching hub.

My question is one (or more) of the new hard drives failing or is it the controller having issues?
Dear Wizards, is there any CMD or Powershell command to get these information?
- RAID status
- Disk information (Good, bad sectors...)
- LED light status on Hard disk

Many thanks!
my concept
I have a homebrew "server" setup I am trying to condense into a few. I have been replacing hard disks for SSDs and now I have a lot of HDDs laying around, I do software RAID 1 with them in PCs and run Ubuntu server, but I have an idea on how I want to set it up cleanly, however, I do not know what to do, where to search for tutorials.

I attached what I want to do in a picture, if anyone could point me in the right direction, that'd be great.

Again, this is for home use, I just want to learn about servers in general and the software.

Apparently, the image didn't upload, so here goes a second try
We are are a single site, single domain with 70 users. We still run our servers in house. I have a dedicated server running Exhange 2010. It's a Dell Powerdge T430 with 32GB RAM and 5 SAS disks on a single H710 controller card. One channel runs 2 x 136GB disks in a RAID 1 array that contains the OS, exchange program files and the logs. The other channel runs 3 x 300GB disks in a RAID 5 array that contains the information store.

The server is 4 years old now and i am planning to replace it in the next few weeks. When i get the new server i will be moving to exchange 2013. Why not Exchange 2016 i hear you ask? We only have CALS for 2013 and as this is probably the last exchange server we will have in house before moving over to the cloud it doesn't make sense to upgrade the licences.

I would appreciate some advice on the disk configuration for my new server. I'm inclined to go for a Dell T440 with 32GB RAM. However my disk choices last time were based on some best practice info that may well be obselete now and overkill for my set up. Can anybody advise whether for my level of users i could get away with 2 x decent SAS disks in a RAID 1 array to run everything or do i need still need to segment the logs and store even at my low level of usage?
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Dear Expert Friends,

I have a ProLiant ML350 G6 server that was put into services on 5/24/2011. Natually the warranty is out and my customer is dragging their feet on purchasing a new server. At any rate the server is rebooting nearly every morning at the same time and throwing POST errors. After some research I found that the HDDs need their firmware updated. I've lived my entire tech carrer in the Dell world and on top of that I've never had to update firmware on HDDs that are in a RAID configurations. Would someone out there be so kind as to provide me with the proceedure to update the firmware on the HDDs with out destroying the RAID configuration or loosing any data. This server belongs to a medical clinic and is very crucial to their practice. I have very little opportunity for down time so I have to have my game plan down cold. Can someone help with the steps and any management software that might help with this task? I've searched and searched but cannot find anythng that provides me step by step instructions and provides me with reassurance that I will not loose data. See below for specs. Also is there any order in which I should do updates. For example, update BIOS, RAID firmware, then HDD firmware? Have you ever seen anyone loose data doing any of these tasks?

Reason for needing upgrade is the HP Proliant Integrated Management Log Viewer is giving POST error: 1770-Slot X Drive Array -Disk Drive Firmware Update Recommended. When researched I found this
14 Hyper v hosts, managed via SCVMM running on a c7000 blade chassis with 10G interconnects - All intel CPU's, 192 GB RAM etc. Broadcom nics but vmq disabled.

Dell 10GB switch managing ISCSI to the chassis and SAN.

IBM v3700 with 2 expansion trays.
5x400GB SSD's in raid 10 for easy tier, 4 x raid raid 6 arrays of 10k disks. (lets call it 8 disks each array) 1 x large Raid 6 of Nearline drives.

The environment is well loaded and runs fine running a varying number of VM loads.

We monitor extensively all performance etc and know that there are no issues with CPU, memory or disk access etc UNTIL:

If a backup is misbehaving, someone is doing a high disk load activity or something like deploying a templated VM, all users across all VM's notice a slowdown or lockup.

DISK IO on the SAN is neligable, Ram usage, CPU Usage does not spike and there only a small increase in the amount of network traffic.

It seems like everything runs well, but just a small event can cause issues.

Looking for ideas, configuration changes or otherwise.
I have 2 disks in my Proliant DL380 which are mirroring each other.  I need to add another disk for storage.  I do not want it part of the RAID just a disk for storage.  I installed the disk but the Server running Windows Server 2016 Data Center does not recognize it.

Thanks for the help please!
Hi  dears,
I have a RAID Card with 128 disk support and 2 GB RAM, I want use 7200 disk drives 12Gb/s with it,
do you know how to calculate reality (in practically)  max drives that i can use without decrease performance ?
do exist formula or relation between 12GB/s in raid card with number of 7200 disk 12GB/s for get max disks?

very  thanks
The Best Regards,
Good afternoon,

I have a server in our environment that I know is having a file corruption issue.  The server is about 6 years old, is running Windows Server 2008r2 with Raid 1.  From looking in the event logs, it does appear that there is some file corruption going on.  The issue that I am having is that when i try to reboot chkdsk /f /r, and then reboot the server, I get a message stating "Cannot open volume for direct access.  Autochk cannot run due to an error caused by a recently installed software package.  Use the system restore feature from the control panel to restore the system to a point prior to the recent software package installation.  An unspecified error occurred (766f6c756d652e63 3f1)."

I have run sfc /scannow, which returned no integrity violations.  I have also ran chkdsk with no other parameters without issues, as well as verified the RAID array.

Any suggestions on further steps that can be taken to perform a chkdsk?
Hi I'm new to Storage , I want to configure Dell MD3820I with Raid 6 , please tell me how configure storage step by step and how to connect this via my Xenserver , Help much appreciated
i have oracle 9i that is work on windows 2003
the problem  that i get a new server and i cant install it on it the server is hp ml30
i didnt find any driver for raid for windows 2003
can i install windows server 2016 and use win 2003 as vm wihtout any problem and any lose in performance ?
or is there any way to install oracle 9i on windows 2008 r2 ?
How to use a RAID 5 spare to replace a failed drive in an HP DL380 G3?

One of the 4 drives (ID 2) has failed. Do I use the Array Configuration Utility to use the spare in place of the failed drive? IF so, how do I do this within the ACU interface (ver. 8)

Or, do I remove the failed drive and placed the spare into it?

Sorry! - never had to deal with hot swapping failed raid drives before. Thanks!

*Please see scrn shot.
I have an SBS 2008 Dell server that will not boot up. I get to the screen to boot normally, safe mode or last known good. Each one continues to boot then the mouse cursor shows and then the server reboots. It is in a loop.

I went to safe mode with command prompt and ran chkdsk /R but that did not fix it

Server is Dell T610 with RAID 5.

What can I do to get this server back up
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Hi experts

I have old server HP Proliant ML150 G5, 32 GB RAM, 2 hot plug cages, each with 4 drives. I would like to create UNRAID server, but I know that limiation of SmartArray controller E200 is  inability to work in HBA (JBOD/IT) mode. I.e. I would have to create for each drive Array0 - this is stupid in case of recovery, SMART indication not being transferred into UNRAID, need to reboot computer in case of failure. Also this card is able only to handle 2 TB disks at max.

Is there RAID card which I can buy for that server which can use with current cages? there are some prehistorical cablings used there, I will make a photo.

Many thanks for your advices

Inside server 1Inside server 2Inside server 3
I need to upgrade my HDD's for my physical server due to space restrictions on the original HDD's.  It is running Server 2008 R2 Standard and the Raid Controller is a PERC H710.  Is it possible to do this by simply removing one HDD at a time, letting the VD rebuild until all of the HDD's have been replaced and then expanding the VD?
I imagine encrypting server drives would slow down RAID. But what happens if a drive fails and needs to be replaced?
Will the encryption allow hard drive replacement?
Are there any other problems with encrypting Windows servers?
Hi guys,

I had a server that suffered a power outage and when it came it back on the fan just stays at 100% and it doesnt boot, i would like to get some data from this server, its a HP ML310 G%, the disks i imagine are absolutely fine, its just booting up the server.

I have a G$ would i be able to put the disks into that or even swap out motherboard?
Dear All,

I am unable to install Windows server 2012 r2 std on HP ML 310 g8  server .
i configured Raid  1   through Intelligent Provisioning. installing time after copy 99% i am getting error "The wim.xml  file was not generated correctly. this may have resulted from a failed file copy of install.wim.
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 ?


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.