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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How can I check if my server have RAID-1?

With lsblk command I get: NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 232.9G 0 disk ├─sda1 8:1 0 32G 0 part │ └─md0 9:0 0 32G 0 raid1 [SWAP] ├─sda2 8:2 ...
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8 views

HP Dynamic Smart Controller B140i not rebuilding

We have a HP dl380g9 with a Dynamic Smart Controller B140i which as 2 Arrays in it: 2x 250GB SSDs in a RAID1 4x 1TB HDDs in a RAID5 One of the 1TB HDDs failed and we have replaced it but the array ...
0
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1answer
13 views

How do I reconfigure my disk array on a Dell machine under Linux?

I have a Dell R620 with a PERC RAID controller (lspci shows "RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS 2108 [Liberator] (rev 05)"). I had placed a single disk in it, made it a ...
0
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0answers
8 views

Install CentOS on RAID1 + RAID10

I'm trying to reproduce this raid configuration with a fresh CentOs installation making experiments on VM. I have the current setup composed by (4x) HDDS sda, sdb, sdc, sdd partitioned in the same ...
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1answer
26 views

HP Array P410, HDD changed, but still predict to fail soon

On HP Proliant DL G6, one disk in RAID 1 on P410 array broken. It was HP EG0300FBDBR. I changed it on compatible HP model - HP EG0300FAWHV. (both 300 Gb, 10K) But HP Array Configuration Utility still ...
0
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0answers
11 views

How to backup mdadm RAID superblock info?

I'm Looking for a simple command that will backup the mdadm superblocks on a RAID volume. A quick way to scan you system would be: mdadm --examine /dev/sd[a-z]* > raid-volumes.txt Now after ...
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0answers
14 views

Is it possible to ask ReFS to use hardware RAID6 for parity calculations?

Does ReFS use FPGA-based XOR engines for RAID parity calculations? If not, is it possible to get it to use such tech?
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3answers
30 views

LVM and RAID setup

I am relatively new to LVM and RAID. I have a Server (HP ProLiant) with a Hardware Raid (RocketRaid 2710). Given two HHDs (500 GB) I wanted to setup RAID 1 (Mirroring). When installing Ubuntu I made ...
2
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0answers
52 views

Can't stop and reformat /dev/md0

I want to reformat /dev/md0, which is a RAID0 array consisting of 4 disks (sd[bcde]). However, when I tried to run the command mke2fs, I received the following error message: /dev/md0 is apparently ...
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22 views

HP Proliant DL160 G6 compatible RAID controller [closed]

Does HP DL160 G6 support Adaptec or other manufacturer RAID controllers? Do you have any experience? Thanks.
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0answers
28 views

Got kernel panic with 3w-sas driver after kernel update

I use CentOS 6.7 and I've got kernel panic related to LSI 3ware 9750-4i Controller after kernel update from 2.6.32-431.17.1.el6.x86_64 to 2.6.32-573.12.1.el6.x86_64. It is minor update, so I think it ...
1
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1answer
46 views

What speed should I expect from an MSA60 attached to an HP p212

I have an HP DL380 G5 with a P212 controller and a 256MB cache card/battery. The P212 is hooked up to an MSA60 enclosure, which for testing, I have populated with 8x 500GB 7.2k SATA disks. I know ...
6
votes
3answers
693 views

RAID with three disks (RAID 5 vs RAID 1E)

I am upgrading a server which has four drive bays. I'll be putting a new Adaptec RAID card into the server so it will support large drive sizes. I need to squeeze as much capacity as possible out of ...
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0answers
3 views

How to Safely Remove Drive from Raid 1 [migrated]

I have a Raid 1 mirror where one of the disk is showing S.M.A.R.T. events so I want to remove it while leaving the data on the other disk intact. My machine windows 10 64 bit uses Intel Rapid Storage ...
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1answer
25 views

Where is the right place to install the ESX vSphere?

I have one server with 6 hotplug 300G SAS HDD. Where is the right place to install the ESX vSphere? 6 HDD RAID10 for datastore and ESX vSphere together -------- OR -------- 2 HDD RAID1 for ESX ...
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0answers
15 views

How add drive to array using LSI Megaraid Storage Manager

I have an LSI 1068E raid card, with 4 disks, configured as 2 RAID1 pairs. I'm not sure how, but I've ended up with a pair in a degraded state, and one of the disks from that pair shows as ...
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0answers
37 views

HighPoint RocketRAID 2740 passthrough

I'm currently extending my server and about to buy a HBA. I stumbled across the HighPoint RocketRAID 2740 which is quite cheap at the moment. I am going to extend an existing MDRaid + LVM ...
0
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1answer
27 views

Raid Controller: Activating Write Back [closed]

We need to activate "write back"-mode on a raid controller in a storage server. Do i need to reinstall the operating system or rebuild the raid setup after activating write back? We can´t test it, ...
1
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1answer
23 views

How to find out raid in linux: cat /sys/block/sda/device/raid_level vs dmraid -s in Redhat?

I am trying to find what raid level and what storage controllers are there in my remote HP server. I can find out the following details which storage controller, size of the disk, model etc. But ...
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1answer
64 views

HP P410 Windows Server 2008 R2 will not boot

I have a HP ProLiant DL160 G6 with a P410 1GB FBWC controller. I have 4 x 4TB SATA drives. When an array has been created, I can start the Windows Server 2008 R2 installation, and it goes fine until ...
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1answer
11 views

#raidctl - Operation not support with volume of this level [duplicate]

I am having problem to create a RAID volume on the internal disks of a Sun Server (Sunf Fire V440) When I type the below command raidctl -f -c -r 5 c1t0d0 c1t1d0 c1t2d0 c1t3d0 it displaysOperation ...
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1answer
37 views

Setup SunFire 440 Raid Configuration

How can I setup Internal Hard disk RAID5 configuration? I have SunFire 440 machine with 4 internal hard disk. I have never worked on Sun systems except for now and I am exploring google for the above ...
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0answers
10 views

Raid Array disappeared and a reboot made it return.

We have an LSI raid card in a RAID 6 configuration. Yesterday our NMS system reported a problem with the machine and on investigation the drive was missing from Windows. Disk management didnt report ...
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0answers
62 views

XenServer 6.2 VM Performance (SSD, RAID-10, Quad-core)

Greetings everyone :) My configuration is the following: HP C3000 tower enclosure 1st HP Proliant BL460 G1 quad core xeon 2.66GHz 12MB L2 cache, 24GB RAM, BIOS I15 5/2/2011 partnered with HP ...
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3answers
2k views

Can “enterprise” drives be safely replaced by near/midline in some situations?

When specifying servers, like (I would assume) many engineers who aren't experts in storage, I'll generally play it safe (and perhaps be a slave to marketing) by standardising on a minimum of 10k SAS ...
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0answers
10 views

Debian 7.9 with RAID 1 3w 9750 slow disk transfer

I have very strange problem with RAID 1 on Debian 7.9 every disk operation read or write is very slow. I have tried to copy one 240 MB folder it take more than 4 minutes. The RAID controller is LSI ...
1
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1answer
14 views

Cannot mount partitions from LSI Software MegaRAID

I have a ThinkServer RD440 running RHEL 7.2 with a LSI MegaRAID which is configured as a RAID 10 over 4 disks. It is configured on a partition level, not the raw disks. The root partition is not part ...
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0answers
226 views

Replacing failed RAID 1 drive on Windows Server 2008 - new drive not bootable

I'm trying to replace a failed RAID 1 drive in Win Server 2008 R2 Foundation and am running into difficulty. See the image from Disk Management: Disk 0 is the good drive from the original RAID ...
0
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1answer
13 views

recover original file system from raid6 iso's

I started with 5 drives. 1 has failed (i.e. fails to communicate anything) and 2 more are returning read errors. My plan is to use ddrescue to store the 4 working drives to iso files. After this I ...
0
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1answer
18 views

Integrated raid exception detected. Volume (00: 009) is currently in state degraged

I have IBM x3200 M2 Server. Currently there are 2*500 GB hard drive installed in it. Raid 1 is configured in this server. I have hosted an windows application in this server. Currently this server is ...
0
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1answer
35 views

Adding disks to add more space to RAID 1+0 array

I have a HP ProLiant DL380p Gen8 server running Ubuntu 14.04.1 LTS. During the installation I had setup RAID 1+0(which I believe is same as RAID 10?): hpssacli ctrl all show config Smart Array P420i ...
3
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0answers
22 views

SAS expander or better controller?

In the past, servers I've put together have all had 8 or fewer disks, so I've not had to give the storage controller much thought - a standard controller like the P440ar (my experience is with HP) ...
0
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0answers
21 views

How to get information why I cannot set a HDD to unconfigured(good) with megacli

Having this HDD in state unconfigured(bad). Enclosure Device ID: 32 Slot Number: 2 Enclosure position: N/A Device Id: 2 WWN: 5001F830xxxxxxxx Sequence Number: 6 Media Error Count: 0 Other Error ...
2
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1answer
49 views

Mdadm raid1 says the last drive attached has failed

I have a software raid1 array. Today I found one of the drives failed to sync, and I got this: $ cat /proc/mdstat Personalities : [raid1] md0 : active raid1 sdb1[0] sda1[2](F) 153597312 ...
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1answer
25 views

ServeRaid M5210 high temperature

I have a serveraid M5210 card on X3650 m5 (raid10) And a M5110e raid card on X3650 m4 Both raid card is high temperature (70-75 C) images: http://i.imgur.com/oa2O7ba.png ...
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1answer
26 views

RAID configuration of a Sun Blade X6270 M2 Server Module

One Sun Blade X6270 M2 server module has four 146GB disks, but the running RHEL5-x64 O.S. finds only a 146GB disk. I guess two from the four disks are a RAID 1 volume -- the one found by O.S; and the ...
0
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0answers
13 views

Best practices for sizing RAID 6 arrays? [duplicate]

I'm wondering what the best practices are for sizing raid 6 arrays. For example: At what point is it better to use multiple arrays or RAID 60? is spindle count the only factor? If reliability is ...
2
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0answers
66 views

Ubuntu 14.04 Software RAID 1 - md0 inactive

I have my root filesystem on /dev/sdc, and a software RAID 1 spanning /dev/sda and /dev/sdb (I think). I physically moved my computer and ran software updates today (either of these could be the ...
31
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6answers
3k views

Why is RAID 0 classed as RAID when it's not redundant?

I've worked in IT quite a number of years, so I know what a RAID array is, what RAID 0 is, RAID 1, 5, 6, 10, 50, 60, etc., but something sprung to mind in a recent conversation at work; if ...
1
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1answer
28 views

LSI 2108 RAID 5, one disk dead, one more with bad sectors; how can I recover the data?

I have a server with a RAID LSI Logic / Symbios Logic MegaRAID SAS 2108 [Liberator] and 4 disks of 3TB attached, configured as RAID 5. Unfortunately after 3 years of good services one disk died (the ...
0
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0answers
44 views

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 ...
2
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2answers
68 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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0answers
46 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 ...
1
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1answer
92 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 ...
0
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1answer
43 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 ...
0
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1answer
21 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 ...
3
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2answers
84 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
37 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
22 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 ...
0
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2answers
33 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 ...