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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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According to the document :

PVSCSI adapters are not suitable for DAS environments.
PVSCSI adapters are best for environments, especially SAN environments

If I setup a new server with Local Storage ex : SSD Drive RAID 10 setup and I created a VM with PVSCSI boot disk and data disk.

My questions :
Why it is not suitable for local storage ? I will not see any significant gain of performance ?

Any technical issue we might expect ?

Not suitable means not functional or not supported ?

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I have a Dell PowerEdge R320 with a PERC H310 controller
I did a CNTL-R at boot created a RAID1 with two SSD drives and installed Server 2012 R2 Standard
This RAID1 is two 256GB SSD drives, just a couple minutes and the RAID was done and ready

Now I added 6 SAS drives 1.8TB
Did a CNTRL-R and I'm building a RAID5
This is taking a very long time, I started at 1:00 pm and 2 hours later it's at 16%
does this sound normal?
I have proliant DL380P GEN8 , I'm going to deploy sage 300 ERP system ,and use the sever to host the company's website..

I have 8 SAS HDD (2TP 10K SAS),

my questions plz:

1- what's the best RAID configuration for my HDDs?

2- Is it better to use HDDs in bay 1 & 2 as RAID 1 logical drive and install Windows server 2012R2 on each of them??.

3- Is there any way to protect my HDDs from damaging ,as 4HDDs suddenly stopped working and during powering the server on asked to replace them


any advice would be appreciated

thanks in advance

waiting your reply
Have a netgear readynas 4360 with 12 raid 10 drives in it for my main volume/share. Recently one of the 10 TB drives failed and netgear said it needed to be replaced so I just replaced it to at 5PM today and it has seriously degraded my production environments performance which is currently running on the volume/share. I was considering rebooting the 4360 while the sync was in process to see if it helps productions performance or the disk to sync any faster as it currently show it will take 83 days to finish syncing????

Is it safe to reboot the 4360 during a disk sync?
HP Proliant ML350 G4 won't boot after Raid 5 Adaptec 2610SA drive failure. After finding the array which has a Group1 Raid 5 with 3 disks, no hot spares, & Volume for data with 3 disks Group 2. The Group 1 was in failed status. I had to recreate the Group1 without writing over the data. Then I was able to add the new replacement disk.(Long story). All that worked with no problem. Now both groups show up as optimal. I was hoping to have the data be all intact and it would boot fine, but it doesn't. It passes up the CDrom, hard disk, etc, and then goes to PXE boot and a continual loop. I have cleared the CMos with switch 6 on. No change. It doesn't have the F11 option. I believe the bios is 2007. But it worked fine forever. I do have backup, so if I can just get it to boot, I'll reinstall the OS and repair form backups. OS currently is Windows Server 2012.

I am basically trying to increase The Local disk C of our HP Proliant Dl380 server, OS: Windows Server 2008 R2. currently, we have only 20 GB left of 100GB. we have 500 GB in LOcal disk D which also is 80% full. So we decided to add 2 more hard disks.

Currently, we have 3 300 GB SAS Hard disk configured in RAID 5. I have already bought 2 more of 300 GB.

How should I proceed?

should I create another array and move the local disk D items to the newly created partitions and then delete Local D and extend the LOCAL C?
if I do this will there be any Data LOSS??? is it compatible in HP P410i??

Please tell me know if there is any other way.
But the Windows Server 2008 won't boot into windows. I get a boot error that windows cannot boot up missing boot file. But when I put the failed drive back in the system boots. When it boots up  I go into the Intel Raid Console and right click the non-raid driver (which is the failed drive, its the only one it boots up with) I get "the volume cannot be rebuilt to the selected hard drive due to one of the following reasons; hard drive contains system files, hard drive is not large enough, hard drive had a SMART event, the hard drive reported failed (which it did), the hard drive is in a different encryption state than the volume.

Not sure what is happening.  Does anyone have an idea why and how to work around this to get my RAID back up?
Thanks in advance.
Hi all

Is it possible for a KVM to communicate with the RAID controller and the disks?
I have a degraded RAID due to a failed disk.  It is not hot swappable.  I shut down.  Pulled the bad drive.  Plugged in a drive from a previous RAID and rebooted.  I have cleared the foreign config on the new drive, but when I try to make it a global hot spare, I get the following message:
Physical Disk 0:3: This Physical disk is not suitable to protect all current or potential virtual disks on this controller. Possible reasons include: Insufficient physical disk space, unsupported mix of SAS and SATA type physical disks, unsupported mix of SSD and HDD type physical disks, unsupported mix of 512Bytes and 4KBytes sector size physical disks, unsupported mix of PI capable and incapable type disks and non-SED drive assigned as a GHS when encryption virtual disk is present. Continue with assigning as a global hot spare?

Physical Disk 0:2 and 1:4 are the same.  Physical Disk 0:3 is the one that I have installed.  The only difference I can see from the other two is the other two are Revision KA05 and the new one is Revision KA02.  Below is what the drives show for specs.  Am I ok to go ahead and configure for a global hot spare or do I need to do something else?

ID 0:2
Status OK
Name Physical Disk 0:2
State Online
Bus Protocol SATA
Media HDD
Revision KA05
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
Product ID ST3500514NS
Serial No. 9WJ0KQW7
Part Number …
I'm trying to set up a FreeNAS on a ProLiant DL380 G6. I'd like to use the internal drive bays for my array. But as you know FreeNAS likes to see the disks without a RAID controller in between. Does anyone know there is any way to disable this internal P410i RAID controller and force it into HBA only mode?

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A friend had an old Windows Home Server NAS with 4 drives. He experienced a power outage which seemed to wipe out his NAS (no UPS). He tried to access the drives in a caddy, but couldn't see any data (he thinks it was setup as mirrored or as RAID - not sure). For some reason he formatted the drives and attempted to recover the data (mostly family pics). When images are recovered they are not shown and look corrupted.

Is there anyway these can be recovered?

Please advise. I have a Dell PowerEdge T420 where the hardware is fine but SNMP for Solarwinds MSP Remote Monitoring is reporting a battery issue  for:
DELL PERC H310 SCSI - "Dell - RAID - Storage Management" and "Dell - Battery State - State of battery" is reporting "Unsupported SNMP variable. Everything matches the other working servers. However I want to compare the OIDs from the Dell Server vs. the Reporting Software. For the monitoring software it is reporting (battery) OID:
Please advise
FYI: Could not find matching hardware when I ran the SNMP Walk on the problem server unless I am looking for the wrong thing? Searched for "battery" and "RAID"

Dell Disk storage  array was attached to the sever, I removed the cable  storage to server  and when I boot got this message.

Foreign configuration(s) found on adapter
Press any key to continue, or 'C' to load the configuration utility.
All of the disks from your configuration are gone.  If this is an unexpected message, then please power off your system and check your cables to ensure all disks are present.
Press any key to continue, or 'C' to load the configuration utility

I believe it found RAID info on the disk, we just need to  import the config. Am I right?
We have an new LSI mega raid 9341-8i. This card comes with 2x internal ports. 8643 SAS ports. We need to connect 24 Drives to the card. However we are connecting theses drives through a backplane.

The card says it can connect up to 32 drives in a RAID configuration. How can we connect more than 2 banks of drives using this card. Can we use a SAS Expander and how do we go about doing that?

We recently started getting a bunch of fatal errors listed on our main server's RAID.  checking the status it shows as no errors and system is optimal, but these errors keep showing up and once I started a consistency check it started listing a bunch more.

not sure what to do next as these errors don't tell me much....

and am I at any risk of losing data at this point?


I have a PE T320 with a PERC H310 controller.

We have a RAID 10 setup with 4 drives.  One has failed.  How would I replace based on this picture?  The pic is the back of the PE.

Back of a PE T320
I'm using HP ProLiant DL380 G9. and the below is current status.
Slot 1: 300GB SAS
Slot 2: 300GB SAS
Slot 3: 1.2Tb SAS
Slot 4: 1.2Tb SAS
Slot 5 : Empty
Slot 6 : Empty
Slot 7 : Empty
Slot 8 : Empty

Slot 1,2 : Raid 1
Slot 3,4 : Raid 1

I want to buy 4 more HDD and add a new volume to the Raid 5. The exiting data doesn't want format. The all data must remain.
Is it possible that new HDD add to the new volume(ex) existing c: d: and add hdd to add as e:)?
 Have a client that had 2 drives fail on a HP 212 Smart Array which caused a rebuild.  Upon opening the U1 rack HP server (DL120 G6) I see the raid controlled circuit board looks a little brown, like its beginning to burn up.  The system with the replaced drives is operational and the server reinstall is completed.  For the extra $50 for the controller I don't mind replacing it, however, my concern is will replacing the controller wipe out the array config (3x1tb raid 5).  I don't want to go through the install again. The cables will stay in the same spot, and the array controller only has 1 connection which then branches out to the hard drives.
 Anyone know for certain if replacing the raid controller will be a safe and non-destructive swap?
 Thanks in advance.
Hello guys,

I´m trying to get some information from my LSI raid controller via MegaCLI - running on Windows server 2016...but all commands from help end with errors...
How to use MegaCli on windows properly? Im kinda lost... :(

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We had 2 identical R620's both using K09CJ PercH310 Controller. Our main server went down with error "R620  A bus fatal error was detected on a component at bus 0 device 2 function 2" which turned out to be the K09CJ controller.  We took this controller out of our secondary server and our main R620 started working again.

However, we purchased a good K09CJ controller and put it in our secondary sever and it wont come up ?? What gives ??
System will not boot. The following error message is displayed on the screen:

"PCIe Training Error : Integrated RAID. System halted!"

A bus fatal error was detected on a component at bus 0 device 2 function 2

How can we fix ?
Hi All -

We have a Dell R720 with 8 300GB 15k SCSI drives in a RAID 10. Recently one of the drives reported a predicted failure. Purchased a new 300GB 15k drive and pulled the predicted one and replaced with the new. The RAID started the rebuild and completed successfully. From the Dell Open Manage program - you wouldn't know anything was wrong. RAID is healthy and disk shows happy. What we noticed was that after that - performance dropped. (Its an app server with a few IIS apps and runs SQL)

End users were stating they were getting timeout messages and such and I could tell in the OS it felt like it was dragging. I took a look at the history of the SQL backups prior to the drive placement and post placement and it was indeed 5-10 times longer to do simple transaction log backups so something was up.

I popped the new drive out of the chassis (which of course degraded the RAID) and found the speed came right back and its quick again. I've not had any issues replacing bad drives before where the performance changed post rebuild with the same size and speed drives.

I'm guessing upgrading the PERC H310 Controller firmware may help - it does show out of date (and I'm pretty sure it was previously) and if that doesn't give any relief - purchase a second new drive? Sound about right?
I want to change megaraid_sas code to change some behaviour of my Lsi raid card but till now i am even unable to study the exact behaviour of this code. There is no way to study and change the code.

Please guide me the correct way to go through this code.
I have 6 1TB hard drives that I intend to use in a RAID 5 (So 6TB minus 1TB for parity is 5TB usuable space.
On the 5TB, I am planning to install Windows 2012/2016 server and use the rest of the space to store hyper-V VM servers.
My question is, are there any likely problems with this disk configuration?
If so, what should I do instead to avoid problems?
Hi Friends,
I have a motherboard with Hardware RAID (Megaraid) in my server,
I installed StorCli for management it in Centos 7 ,
so, when i get disk properties from Storcli, it show wwn for disk,
next, i create disk as JBOD for Show in centos,
when i list my disk as:
ls -l /dev/disk/by-id/

it dont show same WWN in Output StorCli,

can you help me for relation between WWN in output StorCli and in output OS , please?

Thanks for your helps,


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.