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RAID

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 One of my disks failed in my RN10400 device, i have replaced the disk but now the error above appears. There are 4 disks in a raid 5 . I can't get into the OS - i have tried reinstalling this.
 anyone have an idea how i can get this back working or recover the data?
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Hello,
We have an HP ProLiant ML350 Gen9 E5-2620v3 Server using a Smart Array P440ar controller. Smart storage administrator shows the Logical Drive 1 is queued for rebuilding, this is a RAID 1 array.
We can find no reports of a problem with either of the hard drives, our managements system does not show any evidence of faulty drives.
This is a 2012 R2 server, has anyone seen this? And if so what did you do to correct it?

Thanks All!
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A collegue is asking me for help working with a server that has sensitive data on the Raid 5 array.  It will not boot for whatever reason (bad boot sector).  Tech onsite is attimate that we can't just swap one of the disks to see if that will enable the server to boot.

He is suggesting we make a bootable usb, then somehow transfer the data from the logical drive to the usb (it will be at least 1 tb) then we can migrate the data to another newer server.

Is this possible?  If so can you tell me how to do this?
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I had this question after viewing IBM Server 1780 Fixed disk 0 failure.

I didn't see a clear answer to this issue in any of the comments...
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Hey Guys,

Have a HP ML310 G5 server here, a real fun one.
We had a disk failure in a Raid1 Array.

The server we are dealing with has following circumstances.
* 250GB Raid 1 Array.
* Server has only 1GB of ram.
* No HP support or warranty
* In the OS we cannot access "HP Array Configuration Utility" it fails to find the controller???? Instead there is a utility called "HP Storage Manager" installed outside the usual HP configuration tools. This does show the degraded array.
* We were initially unable to kick off the rebuild, so I installed a Pro Liant Support Pack Firmware+Software.
* Now in the BIOS level raid manager I can see the array is marked as "Building" it has been like this for about 16 hours now.

We need to get the server up and running as soon as possible. I do not want to reboot it until at least COB today to avoid any issues with the rebuild being affected.

Any ideas on this? My current stance is to wait another 8 hours , I am considering waiting another 20 hours until work starts tomorrow. Then reboot and check the status in the OS hopefully it either is finished building or continues building from here like it should.

Fun fun
M
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Forget it that they're failed, but why are the RAID and Mirror volumes here also displayed under Disk 0 and Disk 1 in the attached? the RAID volume E is also seen in both disks while the mirrored volume G is in Disk1 with both Volume E: and F: Can someone explain the scenario please?
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We have two 1 TB drives using RAID 1 in a PC that contains the boot partition.  Ever since we upgraded to Windows 10, We've been having problems with it constantly having to re-sync, taking several hours to come back online, all the while experiencing very slow performance.  Here are my questions:

1. Is it possible that one of the drives is bad?
2. If I break the mirror, do I have to do anymore configuring, such as having to program new boot information?
3. Will rebuilding the mirror help correct this issue?

Thanks!
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I have an HP server A DL 360e Gen 8 with a smart array b320i raid controller card that has two drives saying ready for recovery....there are two logical drives on this system.  I am not sure how to start this with the server being up.  I really can't have this server down....really at all.
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Hi All,

Is there any suggestions for creating a CentOS image template for CentOS?

Below are some of the information of what i am trying to achieve.

- Installed CentOS and virtualized it. Used Clonezilla for V2V and V2P on the hardware it was prepared on works.

Problem: Tested Using Clonezilla on another hardware e.g Dell R610 with Raid Controller doesnt work. It goes to dracut recovery mode. In dracut recovery, blkid does not show any hdd.

Reading suggestions online, some suggested to try baremetal backup and recovery tools such as shadowprotect/acronis still has issues with unable to boot.

Any suggestions would be appreciated.
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I’m looking at replacing our current w2k8r2 Storage Server based NAS sometime next year.  Currently we have two DELL NX3200 each with about 15Tb of storage.  The storage is RAID10 and is split into 8 basic volumes (to stop things getting too big) the biggest volumes being around 2.5Tb.  We have 4 volumes that are shared amongst our users and use user based enumeration as well as NTFS permission, a volume for users Home Dirs (with a quota) and two volumes where users can “archive” stuff, basically like their HomeDirs but with no quota, and finally a scratch volume (basically a dumping ground). So each user gets (depending on permissions) a couple of mapped drives to shared volumes, a mapped drive to their home Dir and a mapped drive to their “archive”

We use DFSR for some of the smaller volumes and RSYNC to sync other larger volumes a couple of times a day.  Users are mapped to one of the servers and the other is there purely for a basic DR.
 
I’m looking at improving on this without spending too much cash!  So I‘m after some ideas, but am thinking Storage Replica with server 2016.  I was thinking of getting a couple of DELL xxx servers with say 8*4Tb RAID 6 giving around 24Tb RAW with a 14 bay server I’ll then have room for a couple of boot SSDs, a Hot Spare and room for a couple of SSDs for the logs and a spare bay.  I could then set this up as a basic server-server replica and put it in to our DFS to give us a manual DR failover (don’t really need any more than that so…
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Hello Experts

One of my clients recently had a RAID failure.  We discovered it in time to lose a second drive, and thus the entire system.  I happened to be in front of the server for another issue and noticed the message on the front of the machine.  I ordered the replacement drive, but before we could make the replacement, the second drive failed.

I really need a RAID monitor.  One that will alert me via email when there is a problem.

Any suggestions?

Thanks

thedslguy
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Wanting to squeeze a bit more life out of an old home server.

Is it possible to replace the disks in a RAID 1 array with SSDs?

Current raid uses Sata drives on sata 2.

Replace one drive, let it rebuild, then replace the other.
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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
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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.
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Experts:

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: 1.3.6.1.4.1.674.10893.1.20.130.15.1.4.1
Controller: 1.3.6.1.4.1.674.10893.1.20.110.13.0
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"
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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?

Thanks,
Robert
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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?

Thanks

Denten
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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
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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:)?
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Hello!
 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.
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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 ??
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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 ?
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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.
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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,
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Need to replace the raid controller with different type ,I need instructions for how to install without loos data ?
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RAID

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.