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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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Need help with Dell PowerEdge T710 with a PERC 6/I RAID controller.  I would like to add two more drives as a separate but new VD.  I do not want to delete or hurt the first RAID 1 VD.  So I have some basic questions.  One, if the drives come up as foreign, do I need to clear this?  Will this only clear the new drives and not hurt the first RAID 1?

Then second, how do I add the second RAID 1 without disturbing the initial RAID 1?  Do I "Create a new VD" then select the two new HDD's?  (I know this seems like a silly question but in years past if you select "new configuration" it would delete the current VD, apparently you had to go to view/add Configuration to see the current VD and add in a new one.)  I just wan to make sure I do not erase my primary RAID 1 VD.

By the way this server does not have the admin tools in Windows so I will need to do this through the PERC 6/I interface during boot up.
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Intel SSD for Video Surveillance recording.

I want to try using an Intel P4600 2TB SSD drive for recording on my video surveillance system. Traditionally SSD was not recommended for this as it is such a write intensive task. These newer drives seem like they might be better suited. I need to know if I have everything right here, how well do you know SSDs???

Actual Drive:

Life Time:
This drive is rated for 11.08 Petabytes Written, or 11,800 Terabytes over it's lifetime? Warranty period is 5 years (1825 days). Which means it can handle 6.47 Terabytes per day?

It has 1.61 GB/s Maximum write. 3.2 GB/s Max Read. The old way of recording the video would be to put it to a RAID 10 array consisting of 10 x 15K SAS drives. Not counting for storage space, would this single drive be able to replace that entire 10 disk array?

Who can check my numbers and see if I am crazy or heading in the right direction?


I've an HP ML350 G9 server that has a failed logical drive, this logical drive was setup RAID 10 and I can only see from the log (see below) that there is only one failed disk why am I getting the "Logical Drive 3 has failed and cannot be used. All data on this logical drive has been lost" the RAID 10 should recover till 2 failed disk drives?

can you please help?


Smart Array P440ar

Critical Status Message(s)

274 0 GB SAS HDD at Port 2I : Box 6 : Bay 6 is bad or missing. To correct this problem, check the data and power connections to the physical drive. For more information, generate a diagnostics report.
298 Array C - 1 Logical Drive(s) contains a failed physical drive. To correct this problem, check the data and power connections to the physical drives or replace the failed drive. For more information, generate a diagnostics report.
271 Logical Drive 3 has failed and cannot be used. All data on this logical drive has been lost. Configuration changes to this logical drive are not allowed until this problem is corrected. Also, if your controller supports Expansion, Extension, or Migration, these operations will not be available for any logical drives in the array until the problem is corrected. Replace any failed physical drives and re-enable the failed logical drive. For more information, generate a diagnostics report.


822 The cache for Smart Array P440ar in Embedded Slot has been disabled because there is no …
Guys I have a server with a degraded raid, however the drives are healthy. I have attached pictures so you guys can see what I am seeing in Dell Open Manage. Looks like I am missing disk 0:1:1 from my first virtual disk. Please advise.Healthy VDDegraded VDVirtual Disks

I have the following errors on my Adaptec Raid.

ad Block discovered: controller: 1 ( Adaptec ASR7805 #3A12130E4B0 Physical Slot: 6 ), channel: 0, deviceID: 6, WWN: 5000C50063A0CF6D, vendor: ATA, model: ST4000NM0033-9ZM, S/N: Z1Z0J8VH, firmware level: SN03 starting lba:7fffffff end lba:7fffffff, bad block recovery possible.

Failed drive: controller: 1 ( Adaptec ASR7805 #3A12130E4B0 Physical Slot: 6 ), channel: 0, deviceID: 6, WWN: 5000C50063A0CF6D, vendor: ATA, model: ST4000NM0033-9ZM, S/N: Z1Z0J8VH, firmware level: SN03  0 Last Failure Reason: .

Please also see the attached files.

I wanted to find out if this is to be expected a normal error that is corrected by allowing the raid array to rebuild.

Or should I be concerned and replacing the hard drive ASAP.

Also if I do go for the replace and it is still in warranty is this type of error sufficient that Seagate would replace the drive?



Event logSmart ErrorsRaid_Failure.pdf

 I have a Windows 10 computer and like to create RAID 10 using both "Storage Spaces" and Disk Management. Currently I have 4 x 160GB SATA HDs (3 HDs connected to SATA ports on MB and 1 HD is connected to external USB Hard Drive duplicator). All four HDs showed up in "My Computer". I deleted existing volumes on each HD in DiskMgmt.msc.
 I tried to group these four hard drives in different combinations (all 4 HDs, only 1st and 2nd HDs, 3rd and 4th HDs), but it does not work. I ran Seatools and all HDs have passed the test.
 Please look at the screenshots and you will see that "Create Storage space" button is recessed.Storage Space - 4 hard drives.PNGStorage Space - Create Pool FailureStorage Space - Pool Configuration
Can you tell me how I can create RAID 10 array so that I have a one drive letter with total space of 320GB?

Is there a way to connect a SAS hard drive to (preferably external) USB A or some other way to format it as a stand alone drive / wipe it / etc?  NOT trying to read data from when it was in a server / connected to raid controller, etc.  Looking to start new with the drive.

I have something like this for SATA.  Looking for something like this but for SAS:

I'd rather be able to connect to the external USB, but would you think this would work?  The description says 'Allows you to connect a SAS hard drive to a SATA controller that supports SAS drives'.  Any idea if most dell optiplex desktops support sas drives?

Reading the reviews for that item on amazon , it seems no, desktops don't handle SAS drives.

So what's the cheapest SAS controller and is there one that connects via USB?  Yes, totally not what SAS is inteneded for (many drives, RAID). I am just looking to be able to wipe / format / write new to it as a JBOD... and bunch being one : )
I have an "Intel RS2WC080 8-port SAS RAID Controller - Serial ATA/600 - PCI Express 2.0 x8" RAID controller card.

I would like to connect this RAID controller card to SATA hard drives that I will be using in a non-RAID configuration. Each hard drive will be connected and accessed through its own drive letter within Server 2016.

Are there any cables available (such as "octopus cables" that I can plug into this RAID controller card that will then provide me with connectors for plugging in 4 SATA hard drives?

If so please provide me with the URL addresses of where I can purchase such cables or adapters from.
what is the recommended stripe/full strip size for a Raid 10 configuration exclusively for SQL 2012 files which used for electronic  transaction authentication
I have two very old servers which have been in production for about 7 years.  They are both HP ProLiant DL380 G5 with dual CPU, dual PSU, 64GB RAM and 8x300GB 10K SAS drives.  They are identical in every way.  Because they're old, I keep a spare PSU and several spare drives on hand, but I've never had an issue.

One was being used for some basic hosting stuff for some of our internal services - FTP for onsite backup replication to our datacenter, secondary DNS server for a few zones; like that.

The other was hosting about 7 virtual machines.  One was an old mail server that was servicing one domain for a friend and it also ran some secondary DNS zones.  All of the others were for customers, but were secondary servers for other services.  One VM had important data that (I found out) the customer never backed up.

Yesterday morning, the VM host server went offline due to a failed array.  The array on that server is a RAID5 using 7 of the 8 disks.  The 8th disk was a hot spare.

Booting into the CLI Array Configuration Utility during POST, I found that disks 1 and 2 weren't listed at all.  Disks 3, 4, 5 &  7 were good.  Disk 6 was bad.  Disk 8 was good and was still the hot spare.

I swapped Disk 6 with a new drive and rebooted and received a "drive mismatch" error in the ACU.

Assuming the RAID controller had died a horrible death, I migrated the services off of the other DL380, removed the drives and placed the drives from the VM server into the chassis in the …
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Is it possible to split a RAID10 config on an HP ProLiant server with an E200i controller?
I have a backup DC in a branch location.
This server has 8 x 146GB 2.5" SFF HDDs in a RAID10 config.
Besides being the backup DC, this server is also a backup file server for that branch.
The primary server in that branch has more space and the amount of data has now exceeded the amount of space on the backup server.
I was reading about RAID splitting but I can't determine if this RAID controller supports it.
I'd rather not have to demote the DC and rebuild from scratch.
I was thinking I could get 8 x 300GB 2.5" SFF HDDs and follow the HP documentation for manually splitting the RAID config.
Hopefully someone here can give me some insight or perhaps let me know of an alternative solution that doesn't require me to have to reinstall the OS.
Thanks in advance.
Walked into a new site.  There are two Virtual Drives set up, and both show as functioning.  But on the 01 Virtual drive only, it shows 3 Foreign Drives on the Perc H710 Controller and one other as ready.  The local person(not Technical) has assisted the previous Tech to add two additional drives recently (i believe after one was already marked as Foreign).  I removed the two that she added when she said she did not do anything after inserting the drives.  Can I clear the config?   Will it affect the working Drives or just Clear the Foreign Config from that one Drive?
I have a dell server that is showing a degraded physical drive at 0:1:0. My question is, is this is this indicative of a hard drive dying to do I just need to rebuild the array? Right now this is what im seeing inside Openmanage:Openmanage
Server 2008 R2. keeps rebooting while trying to load windows.
When i start the server, it says, starting windows and restarting itself

i checked the raid in raid storage manager. it looks good. status is bootable.  and from bios, i can see the harddisk as the first priority to boot.  so i dont think it is an hardware issue. i did memory diagnostic test. no issues found. further, i tried to boot from single harddisk - still same issue. and when i plugged back the second harddisk, raid went to rebuild ? is does not mean i will lose data , right ?

think its something to do with software side. tried to boot from safe mode, same issues. keeps rebooting. dont have a previous versions to restore.
i never did repaired a server. any ideas to do repair or to work around this issue.  ?
I have inherited a Synology RS815+ with 4 - 6TB hard drives.  The RS815+ is going to be used as a backup only, so it will be write intensive.  My question is what RAID level is the best for this application.  RAID 1 would seem the best for speed and redundancy but would not be the best use of all of the disk space, as I understand it.

If I could have 2 Raid 1's that would be ideal.

Take it easy on the replies, my understanding of Raid is at the beginner level
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
Need to replace Intel RAID Module RMSP3AD160F
Want to make sure the RAID algorithm is on the drives and by replacing the raid module, we won't lose the array config and data?
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 ?
please explain What is Raid level 00  and its benefits ?.
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 I am trying to build a RAID system in a PC with 4 x 2TB SSD HDs (model:  Micron 1100 2TB SATA 6Gb/s 2.5" Internal Solid State Drive Part#: MTFDDAK2T0TBN-1AR12ABYY)  and like to hear your recommendations on RAID controller card.
 I usually put LSI MegaRaid controller cards on server, but I have not build a personal computer with a LSI Raid Card, let alone outting SSDs on it.
 Having said that, this computer that I am buying comes with ASUS PRIME Z370-A ATX MB which has built-in SATA RAID 0/1/5/10 option.
 Is it wise to just use built-in RAID since SSD HDs are pretty fast anyway or is it worth the money to buy a separate LSI MegaRaid 12Gbps SAS/SATA Raid controller to hook up these 4 x 2TB SSD HDs?

This computer will be used by one person for graphics related work.

I wish to purchase hard disks for purpose of storing financial tick-data. As per my calculations, 6 TB will be required for 3 months of history. Beyond that I may later decide to keep deleting if I don't need or to buy additional storage if I certainly must store longer history.

I do not want to risk losing any of the latest 3 month historical data due to hard disk failure, that is why I intended to set-up RAID 5.

My question is: Which hard disks should I buy?
My constraints/doubts are:
1)  I don't wish to spend money on SDDs, it's hefty price is not worth the additional read-write speed for my purpose.
2)  I immediately want to buy just one hard disk to take one time data load from someone, but want to make sure I can use this hard disk later (in a matter of  weeks)  when I do end up buying other hard disks, and whatever else hardware is required to set-up RAID etc.
3) Will setting up RAID 5, using say four 2 TB HDDs give me 6 TB of storage?
4) Will this RAID system necessarily need a container (rack) and cooling ? Any recommendations for a cheap but reliable rack if so?  
4) I need the hard disks to be easily removable and mobile (not crash due to speed bumps on road), because I might need to, say once a month, take one out and transport it locally to get it loaded etc.  (can one even do that with a RAID 5? i.e. take out one disk, get more data on it and put it back in the rack and expect all disks to magically "get that data"?)
5) I am not sure whether I…
I have a Dell PowerEdge 2950 with an integrated Raid Controller.  The raid will fail as soon as anything is tried with the drives.
Here are the details.
This is an older unit (10 yr) and it is not a production server.  It is only used for IT dept. testing.  It was originally configured with 8 73gb drives.  It has, and still will run just fine with those drives.  They are a mixture or original Dell drives and Seagate (ST973451SS) drives. The Seagate drives are replacement drives from past failures.  As I said, everything works well, without and problems when using these drives.

I thought I would expand the drive storage on this to allow VMware ESXi to be used and allow for multiple test machines.  Again, when used with the 73gb drives, no problems.

I try exchanging out the drives for 146gb drives, and this is where the problem begins. The drives are Seagate ST91466852SS.
I can put the drives in and boot the server, and get to the Raid controller (Ctrl-R) and the system sees the drives and lets me set up a Raid configuration. (0, 1, 5) I have tried them all.
Tipically I would set it up as drive 0 and 1 in Raid 1, and drives 2 thru 7 in Raid 5.  But I have tried different scenarios and they all react the same.
It will let me initialize the drives after creating them.  All is still well at this point.  I can reboot the server and all is still OK.
As soon as I tried to install and operating system, whether a Server, Windows OS or VMware, the Raid fails.  The install …
Does the attached solid RED light that stays on forever just mean the OS RAID partition is working and I should NOT eject the drive ?

If not, what does it mean since both of my PHYSICAL servers have the same 1st drive in the RAID as solid RED that stays on forever ?
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


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.