RAID, an acronym for Redundant Array of Independent Disks (sometimes incorrectly referred to as Redundant Array of Inexpensive Disks), is a technology that provides increased storage functions and reliability through redundancy. -Wikipedia

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SSD Raid 10 Slow write speeds

We have three IBM servers running windows 2012, all identical, they have a Raid (10) of SSD's. However one of the boxes seems to only be able to write at a third of the speed of the others. The other ...
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2answers
104 views

Debian software RAID1 is not working when I remove hard drive

I have been trying all weekend to get RAID working on an old server computer with the Intel ICH7 / ICH7-R SATA-II controller running dual hard-drive with RAID 1. After giving up in hardware raid, I ...
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76 views

RAID 10 Unexpected sense followed by Initialization corrected medium error

The MegaRAID controller on one of my servers just started spamming Information messages this afternoon. It will send six to ten Unexpected sense messages from PD: 7 followed by roughly the same amount ...
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1answer
224 views

HP Smart Array P212 hangs after firmware update

I’ve just installed a perfect-running HP Smart Array P212 in my server. It comes with 2.72 firmware version. My server runs vmware ESXi 6.0 and, after perform a firmware update to 6.64 version as ...
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1answer
56 views

Dell 2970 with H700 and WD RED SAS-2 WD3001FYYG: Compatible? (YES)

we have an old 2970 and 5 SAS-2 WD3001FYYG 3TB SAS disks. We want to replace the PERC 6/i RAID Controller with the Dell H700. Is this a working setup? Can I simply replace the Perc 6/i with the ...
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1answer
31 views

Finding out which is the failed drive on Intel SRCASRB RAID Controller

There is very old server with Intel RAID SRCASRB Controller with 4 x WD5003ABYX-0 500GB drives connected to it in RAID5 array. One of those drives has failed and I want to replace it. Since server is ...
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2answers
168 views

LVM Raid 1 + SSD Caching

I have three disks: /dev/sda slow hdd /dev/sdb slow hdd /dev/sdc fast ssd /dev/vg0 volume group consisting /dev/sd{a,b,c} Each logical volume (lv) should be raid1 mirrored and ssd cached. With ...
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1answer
68 views

dracut-pre-trigger rd.md=0 removing md raid activation boot fails

The system is Fedora 22, recently upgraded from Fedora 21. The remaining kernel from Fedora 21 boots. The two kernels installed after the upgrade fail to boot. The system is an Intel S-5000 PAL with ...
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1answer
30 views

External Drives on RAID/LVM configuration

I had 2 drives corrupted and now replaced with new ones sitting on RAID 0. After installing the new drives I have attached the 2 old corrupted drives via usb to retrieve data from them. These 2 drives ...
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2answers
35 views

Does data get bottlenecked when copying from one server to another when the two servers have different RAID configurations?

Suppose Server 1 is configured with 8 1TB disks in RAID 5. Server 2 is configured with 8 1TB disks in RAID 0. There is a link between the two servers but for the purpose of this question, lets suppose ...
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2answers
27 views

Raid 10 implemented on server. Need to know about its performance when one of the disk fails

Server will be implemented with raid 10 using two 4TB disks.Can anyone help me answering what will happen to the server if one of the disks fails will there be any interruptions on the server? Thanks ...
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148 views

Strange behavior with Dell Openmanage 8.2 and server 2008 R2 64bit and degraded RAID

I recently had to rebuild a domain controller [DC02] due to AD database being corrupted and not repairable. Additionally, this server had a degraded RAID [RAID 1] due to a hard drive failure. I had to ...
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1answer
51 views

mdadm: can I reconnect a USB disk as SATA without needing a rebuild?

In my server there's an mdadm RAID-1 array consisting of two SATA disks, named sdb and sdc. The sdb disk might fail soon (according to SMART data), and I want to replace it with a newly bought disk. ...
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1answer
26 views

mdadm RAID1 won't rebuild

A drive on one of my Hetzner servers failed yesterday. I've replaced it once before, but this time it just will not work. After I copy the GPT to the new disk, I add one of the partitions to the ...
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1answer
112 views

low write disk speed of windows kvm guest with LVM

I have a trouble with my windows 2008 R2 KVM guest. It write speed to disk extremely slow: But on another VM (windows 10) on this KVM host write speed is ok: # cat /etc/system-release CentOS Linux ...
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1answer
28 views

RAID on VMware, Ubuntu guest

I am doing some local testing on VMware server. I have set up my VM with two hard drives. I am installing Ubuntu Server, and creating manually in the installation the luks above a RAID 1 ...
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1answer
40 views

DegradedArray event on /dev/md2

I am getting the following error on my Proxmox server. It has happened multiple times over the last few days now. How am I able to test if the RAID hard drive is faulty? This is an automatically ...
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2answers
40 views

Dell Poweredge 1950 III Test Server - Swapping Mirrored Disks

I have a test server (PE 1950 III). I would like to run both a Windows Server 2012 R2 Hyper-V environment with VMs as well as a ESXi 5.x environment with VMs. This is strictly for test. Its my ...
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1answer
87 views

What does sunit=0 and swidth=0 mean for XFS file system?

I created an XFS file system using default parameters at the time of creation of a system. Now looking at the output of xfs_info, it show 0 for the values of sunit and swidth. I can't seem to find ...
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0answers
84 views

“personality does not support diskops!” when trying to add a drive to a mdadm raid array

I have a linux (3.19) server which uses software raid (mdadm v3.2.5) and there is a raid0 device (/dev/md2) set up, which currently has only /dev/sdb3. I want to add the unused disk /dev/sda3 to this ...
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1answer
182 views

Linux- Convert 2 disk raid1 to raid0

I have a linux server (3.19.0) which has raid setup with md (v3.2.5). / is a raid1 device with 2 disks. There was a mistake when installing this machine, instead we need those 2 disks to be in raid0 ...
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2answers
91 views

Flashing firmware to hard disks behind LSI controller

We have an Intel RAID Controller RS25DB080 (LSI SAS2208) with four ST2000NM0033-9ZM175 SN03 SATA disks. A hardware RAID10 volume is built using these disks and an Ubuntu Server OS is installed on it. ...
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1answer
83 views

High CPU system time of unknown nature

Environment: Intel Server Board S2600GZ 2 x Intel Xeon CPU E5-2620 128GB DDR3 RAM Intel RAID Controller RS25DB080 (LSI SAS2208) with four ST2000NM0033-9ZM175 SATA disks Ubuntu 12.04.5 LTS / Linux ...
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25 views

Hot Swap Disk With One Disk Failed and One Predictive Fail in Same Array

I have a RAID 10 Array sitting on a HP Smart Array P410i controller. One disk has an error status and one has a predictive failure status. Is it safe to replace the predictive failure disk and then ...
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14 views

Error while mounting /dev/md0 on aws instance

I created an instance with 16 EBS volume in AWS. Then I created RAID and mounted to one of the directory and loaded some data. I detached the volumes and terminated the instance. Again I created an ...
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1answer
140 views

4TB drives in RAID 1 with Promise SuperTrak EX8350

Two 4TB drives are connected to a Promise SuperTrak EX8350 controller with the intention of setting-up a RAID 1 array. Before attempting to create any logical drives, the capacities of both drives ...
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16 views

Raid 1 and Raid 5 with Debian 8 Install [duplicate]

Ive been advised that i should install Debian 8 using the following raid configuration: Raid 1 (2 discs) - for OS Raid 5 (4 discs) for data. This way, i can have 2 disc failures and still have a ...
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1answer
28 views

Change partitions of disk with RAID and LVM

TL;DR: How to combine RAID + LVM partitions online (not touching rootfs)? I have a server which was used for something else before and had a certain partition structure create. df -h shows ...
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1answer
78 views

FBWC and Zero Memory (ZM) RAID Controller on HP DL360p

I got a chance to work on HP DL360p Gen8 server with Smart Array controller P420i/ZM What are the advantage of having FBWC or BBWC Will it be possible to add an external P420/1GB or P420/2GB to ...
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2answers
24 views

Can I convert a single-disk system to software RAID1 without double-copying?

I have read this question: Can I create a "soft" RAID1 array without nuking data? as well as many other tutorials that layout this general process: Create degraded RAID1 array on new drive ...
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1answer
194 views

Can I effectively clone my hard drive by using mirrored partitions in Win Server 2008?

I have a server running Win Server 2k8 R2 Foundation, functioning as a basic file server and CAD software licensing server, with the following situation: Originally installed with 2x 250GB physical ...
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1answer
21 views

For a RAID managed by mdadm, Is there any real difference in specifying devices versus partitions?

I run a RAID10 utilizing 4x 4TB disks, created with mdadm and without a dedicated raid controller (four hard drives plugged right into the server's motherboard). When it was originally set up it ...
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4answers
256 views

Erasing Server RAID Hard disks (SAS and SATA) for decomissioning

We are in a process of decomissioning a handfull of Fujitsu Primergy Servers. Before of course, we want to make sure that the hard disks are completely wiped out. But it seems there is no way to ...
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1answer
90 views

HP ML360 G6 server won't boot after swapping system disk

I am hoping for some help since I am completely out of ideas how to solve this! I have a ML360 G6 server with a smartarray p410 controller. All disks conifured in 4 separate arrays in raid 0 (I know, ...
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22 views

M5015 Disk controller - Replace failed disk used working disk

I have an IBM X3200 M3 machine with a M5015 SATA Disk controller (RAID 5). One of the disks has failed ie orange light flashing on the disk. I intend to replace the damaged disk with a used disk of ...
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3answers
61 views

CentOS 7 server rebooted itself into rescue mode - how can I find out why?

I've switched it back to regular boot and it seems to boot up fine. So why did it reboot? Running "last" doesn't even show a log OF a reboot. What does that suggest? When I try "smartctl -a ...
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1answer
21 views

what are the good ways to migrate the Hdd SAS from bad server to the good server without lose data

I have a problem with a HP ProLiant ML350 G6 with 2 SAS HDD 300GB : I shut it down for add a network card, but it won't start. I have changed (migrate) the HDD to an other good server, But both ...
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1answer
60 views

What RAID configuration for 16x1TB disk? [closed]

One customer has got a Dell server with 16 x 1TB 7.2k Near Line SAS 2.5 HDD and the server will be configured according to my opinion. I cannot change specs as the order is already given. I want to ...
2
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0answers
19 views

mdadm raid1 back to single drive

I have a raid1 install of debian 7 with software mdadm on 2 disks. What I want here is to split this to 2 separate systems and be able to multiboot them. I guess while I have the system running ...
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2answers
109 views

Linux raid10 on 2 disks

Linux mdadm has some quirks, one of them is building raid10 with only two disks. There are some reports that it's way faster (twice, both in read and write) as RAID1: ...
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0answers
28 views

What are these raid errors?

I installed a new server with two sets of mirrored RAID 1 drives. The system sees 2 1TB drives, each of which is a mirrored set. This is a software raid (no hardware controller) done at BIOS level. I ...
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1answer
173 views

How do I clone a single drive onto a new RAID 1 array?

Here's a little background on the situation at hand. I have a DELL Precision T7600 at work that I'm responsible for maintaining, which just lost a hard-drive, thankfully just the /home directory was ...
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1answer
48 views

Why does linux automatically start a hardware RAID1 resync, on two new and blank disks and how do I stop it?

I've looked at similar posts about software RAID, but this is a hardware RAID question, and googling did not turn up anything so I turn to you guys. I understand that hardware RAID has a single-point ...
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1answer
62 views

RAID 6 >80% Highest Active Time with small I/O

I have a RAID 6 with 18 disks. It is used as a storage for small images(5-500Kb). It is about 6TB full of data. I have an utility that reads that images to the ram and then send it over network. I ...
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24 views

Identify which windows drive is mapped to a raid array

My Windows 2012 server is hosting a LSI 9260 RAID card that is in turn hosting 2 logical drives of 1TB each. The drives are mapped to D: and E: respectively. To add more space to the server I need ...
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1answer
277 views

Dell H700 Passthrough drive in other server

We have a server that is configured in a Dell R510 using a RAID controller H700. The drives are presented individually to the OS. Each drive is configured as a 1-disk RAID0 array as the H700 doesn't ...
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11 views

SQL Server Table Partitioning & Impact of Raid Levels

How does SQL Server Table partitioning get impacted by the DISK RAID level ? We have a SQL Server with 8 data disks . The main table in the database has over 200 million rows partitioned by day of ...
2
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1answer
22 views

Raid failed hdd on new server without data lose

How to connect old raid 1 (failed) hdd to new Dell power edge 720 , without losing data. HDDs are SAS 2x 146 gb. Or how can i get data from these hdds. When connect hdds raid controller only show ...
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186 views

wrong # of devices in RAID set on Centos 6.7

I just set up one of our servers with Centos 6.7. It's a machine that hasn't been in use for at least a year. I had to set it up a couple of times but every time one of the problems was with the ...
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2answers
50 views

RAID10 with 24 drives on Linux

I have an Ubuntu server with attached 24x1TB drives, which I would like to use for storage. I would like to use RAID10 with ext4, but all examples I saw (such as ...