RAID solution handled by the operating system.

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1answer
413 views

How do I keep mdadm from renaming my RAID array upon reboot?

So I have a system (a large instance running ubuntu-11.10 on Amazon EC2) where I've done something like mdadm --create bigdata --level 0 --raid-devices=2 /dev/xvdb /dev/xvdc I get a RAID device ...
2
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1answer
578 views

What was the default chunk size in previous versions of mdadm? Is there a way to set data/super offset? Trying to recreate a raid 5 md with all spares

I have a 6 device raid 5 array which had 1 disk go bad and then due to a power outage, the machine shutdown and when it started all the disks were showing up as spares with the following mdadm -E ...
2
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1answer
650 views

Can I move an entire software RAID1 array containing Linux to another machine?

I want to move an entire array of drives from old server hardware to new server hardware. There are 3 SATA drives with two partitions each; a small boot partition and a data partition. There are two ...
1
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4answers
96 views

Building a raid with 6 hdds which can handle 2 fails

I had a massive data lost with my last raid5 (with 1 spare out of 4 hdds) using mdadm, because 2 drives failed within 1 day (unfortunately). Now I bought new hdds and now have a total of 6 hdds. I ...
0
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1answer
1k views

md2_raid1 takes HDD IO up to 99 %

Iotop tool reports that md2_raid1 takes HDD IO up to 99 %. The server's HDD becomes busy and it's impossible to do any operation on it. Here is the output of cat /proc/mdstat: Personalities : ...
7
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2answers
1k views

Linux mdadm software RAID 6 - does it support bit corruption recovery?

Wikipedia says "RAID 2 is the only standard RAID level, other than some implementations of RAID 6, which can automatically recover accurate data from single-bit corruption in data." Does anyone know ...
0
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1answer
395 views

Move OS from Software RAID (PERC S300) to Hardware RAID (PERC H700/H800)

A client of ours has a server running Windows that is installed on a PERC S300 software RAID. We want to upgrade this to a larger capacity, so we are also upgrading to a hardware RAID card (PERC ...
0
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1answer
435 views

Which HDD I can replace WDC WD20EARS with in the software RAID?

I have one customer's server with WDC WD20EARS drivers in a software RAID. These disks are of advanced format (4Kb sectors, not 512 bytes). They are configured as follows: Configuration: ...
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0answers
880 views

Best way to change disks with Intel Rapid Storage Technology 10.8.0.1068; only one disk in current array

I have a raid 1 array which is currently missing one disk. I want to change the system over to two completely new disks. I currently have Intel Rapid Storage Technology 10.8.0.1068 installed. What is ...
1
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1answer
369 views

Upgrading Intel Matrix Storage Manager to Intel Rapid Storage Technology, windows 2003

I would like to upgrade the Intel Matrix Storage Manager software on a windows 2003 std box to the latest version of Intel Rapid Storage Technology which my mobo (ASUS P6X58D-E) supports. Can someone ...
0
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1answer
685 views

Intel Matrix Storage Manager RAID rebuild cycles over and over

I am working on a machine that has Intel Matrix Storage Manager on it. It says it needs to rebuild the RAID1 array, but it seems to get to about 35% and then starts the rebuild over again at 0%. ...
2
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1answer
814 views

why does windows 2008 resync software RAID after a power outage?

i had a power outage. before the outage my RAID 5 (4 SATA drives) was fully synced. perhaps I was doing some trivial writes during the poweroutage, but afterwards windows decided it has to do a ...
2
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3answers
1k views

What would happen if I did a raid on a SSD and an HDD?

I am building another server (cheap) and would like to go with a 256GB SSD drive for my boot and data. This will be enough for my needs, but just having one SSD scares me for a couple of reasons. If ...
2
votes
3answers
901 views

Can I convert a raid10 array to raid0?

I have created a raid10 array using mdadm. Metadata version is 1.2. I want to convert this to a raid0 array, is it possible? P.S. I am having terabytes of data, I want to avoid copying the data over. ...
4
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1answer
294 views

What is the meaning of the 'Personalities' feature under /proc/mdstat

On some systems I see this : Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath] [faulty] md1 : active raid1 sdb1[1] sda1[0] 10485696 blocks [2/2] [UU] md2 : ...
0
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1answer
136 views

Raid 1 / Raid 10 - Disk Failure

I have setup Software Raid 1 and Raid 10 using VirtualBox for testing purpose. The partition and raid setup look like this: When I deliberately remove Disk2 and restart a server, it booted to OS ...
6
votes
1answer
1k views

Raid 1/10: Kernel panic- not syncing: attempted to kill init

I have setup Raid 1 & Raid 10 in Virtual Box for learning purpose. The following Partitions for 4 Hard Drives: I make a 100mb partition (/boot) on four drives and make that a raid 1 partition. ...
4
votes
2answers
546 views

Software Raid 10 on VirtualBox?

I want to learn how to use Software Raid 10, is it possible to use VirtualBox by adding four storage images? This is my plan: 4x 100mb partitions (1 on each drive) configured as a raid 1 for ...
2
votes
0answers
320 views

MD Raid can't be assembled

I was running a Raid5 with 3 disks at on my homeserver. But had some problems with the back-plane for the disks. The disks weren't detected reliable. So I replaced the back plane and the disks are now ...
2
votes
2answers
2k views

Cant boot newly created mdadm software raid in Debian linux squeeze

Hello I have very strange problem creating swraid on Debian Squeeze Linux. I started creating RAID1 from existing standard instalation of Debian on single drive. So I bought new drive and started ...
4
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1answer
634 views

does the *physical* order/location of drives in a mdadm-managed RAID-10 array matter?

i've setup a 4-drive RAID-10 array using mdadm-managed, software-raid on an x86_64 box. it'd up & running and works as expected, cat /proc/mdstat md127 : active raid10 sdc2[2] sdd2[3] ...
2
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2answers
8k views

How to setup fake raid for vmware virtual machines?

I have a vmware esxi 5 running on a server with ssd and two hard drives. The server comes with software lsi megaraid and intel rapid storage raid. Neither of them work with esxi. I need to somehow ...
1
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1answer
1k views

Convert to dynamic disk / option disabled

I'm trying to setup a software RAID-1 at a new hosted server. It has two 3TB disks in and I've installed a fresh copy of Windows Server 2008 R2 Web Edition with SP1 on one of those disks. A ...
0
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1answer
258 views

Server Config Software Raid Slow Read

I have 6x WD Caviar Black 1,5 TB in Software RAID 10 / 1 / 0 (Centos 6.2 / mdadm) cat /proc/mdstat Personalities : [raid10] [raid0] [raid1] md0 : active raid1 sdf2[5] sda2[0] sdb2[1] sdd2[3] sdc2[2] ...
0
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4answers
322 views

Software RAID setup questions [closed]

I would like to set up a server at home that will have several roles, but the primary and most critical role would be a file server. It will host family photos and videos among other things that I do ...
0
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1answer
139 views

Install sw RAID 1 on production server from single disk?

Is it possible to install software RAID 1 on a single disk Debian server without erasing/format the data on the original disk? What approach would you recommend?
0
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1answer
94 views

Hard drive performance in small-sized server+RAID 5 [closed]

Disclaimer: I'm an undergraduate intern and this is my first server build I've been asked to build a small server for our team around the office. We are trying to maximize space (our motherboard has ...
2
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0answers
426 views

How do I create a RAID10 array using EBS on Amazon?

Basing this question on information I got in Why does df shows only half the size of a RAID10 array?, how should I create a RAID10 array using EBS volumes on Amazon, in a way that will not be ...
1
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0answers
262 views

After upgrade to SLES11 SP1 - LVM on top of software RAID5 not working anymore

On a system where I have been running OpenSuSE11.1 for some time I performed a fresh installation of SLES11 SP1. The system used a software RAID5 system on top of which an LVM was setup with a single ...
2
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2answers
1k views

Software Implementation of RAID 10 on a Windows Server 2008 running on Amazon EC2

Does anyone know of a software implementation of RAID 10 that will work on a Windows Server 2008? Specifically I'd like to use it on a virtual instance running on Amazon's EC2, connected to EBS ...
2
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3answers
3k views

Creating RAID1 on Windows Server causes not enough disk space error

I have three disks. Disk0 (boot), Disk1 and Disk2. Disk 1 and 2 are both unformatted and unallocated drives. I am trying to mirror Disk0 to Disk1. They are both Dynamic and are both the same size ...
0
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2answers
468 views

recovering data from raid1 component disk

Need to recover data from raid1 component disk using ubuntu live usb disk. The existing software raid was broken. After many attempts, I removed degraded raid setup from BIOS but ubuntu live could not ...
0
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2answers
667 views

How reliable is CentOS 5.x RAID 1? I'm considering the SuperMicro MicroCloud product which has everything i need except for hardware RAID

The SuperMicro 3U blade server looks very promising - MicroCloud! If i configure RAID 1 on the 2 SATA drives in each of the blades, how would that work out in terms of reliability? Compared to 8 1U ...
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1answer
76 views

IRP/DRP for CentOS software RAID

We're finally trying to start doing things right by getting proper servers. We've got a HP server (With B110i but it's not being used as RAID controller) and it's running a CentOS 5 derivative with a ...
7
votes
2answers
2k views

Convert linux software raid from raid5 to raid6

I currently have a file server with 3 1.5TB disks in a RAID5 array. Since it's pretty much full, I got three additional disks (also 1.5TB each). Now I'd like to switch to RAID6 since 6TB space is ...
0
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2answers
147 views

Shrink windows server 2008 software raid

I have a windows server 2008 with 5*2TB disks in a windows server software raid 5. I want to shrink the volume down to 3 disks and use the other two disks elsewhere but can't find a guide on how to ...
1
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1answer
181 views

“hot swapping” linux md raid1 - does re-mounting file-system temporarily read-only enable safe disconnection?

There's is an ext3 filesystem on top of Linux md raid1, array consists of two hard drives. Various services, including databases run on and write to it. Let's say for argument's sake that to minimize ...
1
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3answers
2k views

Creating a partitioned raid1 array for booting a debian squeeze system

I'd like to have the following raid1 (mirror) setup: /dev/md0 consists of /dev/sda and /dev/sdb I created this raid1 device using mdadm --create --verbose /dev/md0 --auto=yes --level=1 ...
2
votes
2answers
350 views

Does Windows Server 2008 software RAID-5 protect against bad clusters?

I have tested rebuilding a Windows Server 2008 RAID-5 after a whole disk fails, and this works pretty well. It's a bit harder to test a few clusters going bad. Will Windows detect this, correct for ...
2
votes
1answer
245 views

Reboot during software RAID1 rebuild?

I have two disks in a software RAID1 in OSX 1.6 One of them failed, and I'm rebuilding it now but it is taking 10 hours to do... I was wondering if it's safe to shut down and continue this at ...
5
votes
1answer
176 views

Recovering linux software RAID array without removing it's items

I have linux software raid (RAID10), md2 : active raid10 sda6[4](F) sdd5[3] sdc5[2] sdb6[1] 390620160 blocks 64K chunks 2 near-copies [4/3] [_UUU] which has degraded state. Can i start recovery ...
1
vote
1answer
2k views

Ubuntu EC2 Raid0 Ephemeral — SSH connection after reboot

First, I launch a fresh large instance using the Elestic AMI ami-c162a9a8. Initially, I run: df -h /dev/xvda1 9.9G 814M 8.6G 9% / udev 3.7G 4.0K 3.7G 1% /dev ...
0
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1answer
151 views

Software Raid 5 in Enclosure - Server Crash - Hope?

I'm a software guy. I have inherited a Windows 2008 server that had a 4 disk raid enclosure (one of those Rosewill ones from NewEgg I think) connected to it via eSata. The Windows server was ...
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1answer
486 views

Filesystem encryption settings during install?

I'm installing CentOS 6.1 on a server and exploring the encryption settings in combination with software RAID. Should I encrypt the drive partition, the software RAID device, or both? Should I ...
0
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2answers
657 views

Forgot to create a second RAID for swap partitions in Software RAID 1. Will it work?

I have a Ubuntu 11.10 headless machine setup with Software RAID 1. It has two drives, each drive has a main boot partition (sda1 & sdb1) and a small swap partition. I created a raid for the boot ...
2
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1answer
405 views

Does my server have software RAID 1 set up?

I recently got my dedicated server it has 2x 1TB HDD's, so I asked for software RAID 1 on set-up and my provider asured that server have RAID 1 (software). I tought that if I will run RAID 1, I will ...
0
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1answer
95 views

Bandwidth efficient software RAID [closed]

I have this crazy idea .. that might just work if I find my missing piece Take network with 40 windows workstations (on 24 hours) Each machine uses 20 GB out of 500 GB capacity Install free copy of ...
2
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2answers
209 views

UnRaid software raid - CentOs

I have a linux ( CentOS ) server that has 2 hard drives, and it configure by software raid1, Now I need to un-raid hard drives, and use both of them. How can I Un-raid them ? ( I just has SSH access ...
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3answers
532 views

SAN Distro with iSCSI and software RAID 5 [closed]

Im looking for an OS, to install on a server, which has 4x 1Tb disks. Id like to couple those disks as an RAID-5 array, and share it over iSCSI to VMWare ESXi 5. Im not sure if this exists... I have ...
0
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1answer
308 views

Redundancy on the Freenas install itself?

I'm wondering what kind of redundancy I can put in place for the Freenas install itself. If the drive that Freenas is installed on fails, does that mean all my raid volumes are gone since its all ...