RAID1 or mirrored RAID uses two disk that have the same data.

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Linux RAID1, with reads restricted to one disk

I'm looking for a way to replicate a all changes on a filesystem between two disks in a master->slave setup. One of the disks is much faster for reads, so I would like to direct all reads to this ...
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2answers
454 views

DELL PowerEdge 2850 - How to change PEDC 4e/Di from RAID-0 to Raid-1?

SERVER : PE 2850 RC: PEDC 4e/Di Raid Config: Raid-0 (Current) Disk: 2 X 300GB I have very little in this server space, Recently I got a server PE 2850 and trying to change the RAID configuration ...
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694 views

CentOS 5.2 not detecting Raid 1 on new Dell R710

I've tried recreating the RAID, but every time I get to the section of the installation where it asks which hard drive to use, it claims there are none available. I currently have two 300GB Seagate ...
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4answers
750 views

Adaptec HostRaid RAID1 1/2 of HDD capacity

I have a server with Adaptec HostRaid controller. It has 2x 2TB drives. If I go to create a RAID0 array (striped), it will set the array's capacity to 2TB, when I go to create a RAID1 array (mirrored, ...
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1answer
278 views

Encrypted partitions with redundancy on ubuntu server

Hey I have to make a file system with an encrypted partition with on ubuntu server. something like Unencrypted: / - 10 GB /home - 10GB /var - 5GB -------------- Encrypted: /opt - 50GB This I can ...
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2answers
1k views

How to make a Linux software RAID1 detect disc corruption?

This is one of the nightmare days: A virtualized server running on a Linux SW-RAID1 runs a VM that exhibits random segfaults in seemingly random codechunks. While debugging I find that a file gives ...
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1answer
2k views

How to move 100mb hidden system reserved partition on Windows Server 2008 R2 to other drive?

I have a server with two 1.5TB hard drives. I was going to install a Windows Server 2008 R2 and create software RAID1 using Windows Disk Management Utility. I instaleld Windows, open this console and ...
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1k views

Extracting data from a RAID 1 array with out original controller

A Dell x346 server crashed (motherboard went bad) and I need to get a few files off of the hard drive. They are 2 SCSI hard drives in RAID 1. As far as I know both drives are fine. Can I just put one ...
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1answer
661 views

MD RAID 1 with external bitmap doesn't fully resync

I have an interesting configuration: dual boot system with a RAID 1 that needs to be visible in both Windows and Linux. The Windows install is Win 7 Enterprise, and the Linux install is Kubuntu 10.04. ...
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3answers
625 views

Would unplugging a drive simulate a drive failure?

I just set up a RAID 1 array, 2 2tb drives mirrored. I am wondering what will happen if one were to fail. Would unplugging one of them be a valid test? I am using the Onboard controller of an asus ...
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293 views

RAID1: Migrate HDD to SSD?

My current workstation uses an Adaptec 5805, with Win2008 mirrored between two 72 GB (10K?) savvio drives. My question is if there's a way to migrate the mirror to use SSDs - I've been looking at ...
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1answer
72 views

Upgrade no raid server to raid

I have just learned that our PDC has a single drive with 2 partitions. I also know that this drive has bad blocks as recorded in the event log. What I would like to do is to convert this to a RAID ...
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3answers
442 views

Why can't I create a RAID 1 on my 3ware 9650SE-4LPML?

I have 4 2TB drives. I want to create a 4TB RAID 1 array. I select the 4 drives in the RAID BIOS, and try to create an array, but my only options are RAID 0, RAID 5, and RAID 10. This controller is ...
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2answers
235 views

Dell Power Edge 2850 running slow on 1 drive?

Would a dell poweredge 2850 running in a Raid 1 (mirroring) config run in a reduced performance state if one of the drives break? We're waiting on a replacement drive and getting numerous errors. Does ...
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4answers
357 views

Can I keep the data on my Raid 1 drives if I move them to a new Raid controller?

I have a couple of servers I'm about to decommission and they each have 2 raid 1 drives. I want to take these drives and put them in a DAS but I am told that I will lose the data because the raid ...
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2answers
265 views

Opened raid1 in raid0, what now?

I accidentally opened my 1 disk raid1 as raid0 with mdadm --create, and this looks like it overwrote the default raid meta info, and makes my device detected as raid0 with mdadm --assemble --scan. For ...
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3answers
3k views

HP Smart Array; Is it possible to convert Raid1 to Raid0 by dropping a failed drive?

I have a server that was running two 60GB drives as a logical RAID1. At some point the second drive was physically removed and the logical drive has been in "Interim Recovery Mode" for several months ...
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5answers
512 views

RAID-1 disk failure question

Assume a 2-drive RAID-1 array on an HP DL 380 G7 server with the P410i raid controller. If the controller determines that one of the two drives has failed, I assume that it will automatically start ...
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1answer
136 views

Boot partition on Raid?

I have a machine with two HD drives. I want to use Raid1 for redundancy to avoid data loss. I have two possible scenarios: 1- Install /boot partition on both drives using Raid1. 2- Install 2 ...
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1answer
534 views

Linux: create software RAID 1 from partition with data

I have a partition /dev/sdb2 formatted as fd and that is mounted as /var. I need to make this partition ready to raid 1 ( for this example /dev/md1 ). I still don't have the second HD, but want to ...
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1answer
71 views

Raid set up question

So I want to set up a server with Raid 1. The machine currently is running Ubuntu server and has a media drive that is shared with people in my house. I would like the media drive, all home folders ...
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3answers
1k views

SSD RAID 1 and INTEL S5520SC

I've a server using INTEL S5520SC motherboard. I was wondering if it's possible to connect 2 SSD 128GB INTEL EXTREME drives in RAID 1 directly to this motherboard or would I need some kind of external ...
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147 views

Install RAID 1 using two disks

I have a Unix server running with 2 disks with the same capacity, but 1 is being used only for backups storage. I would like to temporarily use that secondary disk as a mirror of the first, and move ...
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5answers
1k views

How can I increase the size of a RAID 1 array from 750GB to 1TB? 3ware

3ware 9650SE-2LP Array is 750GB volume, RAID 1. One drive is 750GB, the other is 1TB. Looking to replace the 750GB drive with a 1TB. Will the array rebuild to the max size of 1TB, or will the array ...
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1answer
140 views

What would cause a Windows 2003 Small Business Server to lose a month of data?

A customer we recently took over, suffered a catastrophic failure last week due to (what appears to be) hard drive failure, and possibly caused by a faulty power supply. (Take this time to laugh at ...
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4answers
2k views

Identify disks on an LSI SAS1068E controller

I'm trying to identify clearly which disk needs replacing in a RAID1 array. The controller shows it's PhysDisk 0 id=1. When opening up the machine how do I know for sure which disk this is? (Ideally ...
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4answers
396 views

How “swappable” are RAID 1 drives?

My lab is considering setting up a server with an attached RAID device for storing our large imaging datasets. (probably a Mac Mini server with attached Promise SmartStor DAS w/ 4 1TB hard drives) ...
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2answers
1k views

HP Proliant DL320 G5 Raid Advice

So I just acquired this HP Proliant DL320 G5 Server with two 160GB drives setup in a Raid 1 array. I'm planning sticking this in a colo and installing Proxmox (openvz server) and running two ...
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4answers
481 views

how to know that RAID 1 is installed?

recently we have a server crash, so we decided to mount a RAID 1 in our server. so we asked to the hosting, they told us that was needed to reinstall all the system again. so we make it, and now i ...
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1answer
7k views

Boot from software RAID 1 on Windows Server 2008 R2

I have a Windows Server 2008 R2 x64 system with a single hard drive, and I have a spare hard drive of same size/model that's not being used. I was thinking about dropping in the new drive and setting ...
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1answer
2k views

How can I set up a RAID 1 without losing my Windows install?

I know this sounds like a SuperUser question, but I would rather ask here first. The drives are identical Seagate SATA2 drives. They are 250GB each. Windows XP Pro SP3 is installed on one drive, and ...
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3answers
2k views

Any disadvantages of using built-in software-RAID-1 on a Windows Server?

I have had some problems using hardware-RAID on a server. Now I'm planning to use the Windows Server built-in software-RAID-1 instead. The server will only be used for Business Administrations, so I ...
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5answers
855 views

RAID 6 to RAID 1 with mdadm

My home network is changing and I am moving my file storage solution away from my Ubuntu server and onto a Drobo FS. I currently have 6 500GB hard drives in a RAID 6 array providing 2TB of capacity. ...
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2answers
550 views

Remove dead HD in Raid1?

I am on debian, raid1, one of the drives seems dead. root@rescue ~ # cat /proc/mdstat Personalities : [raid1] md1 : active raid1 sda2[0] 486279424 blocks [2/1] [U_] md0 : active raid1 sda1[0] ...
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What tools can I use to test the real read speed of a RAID1?

Some RAID controllers speed-up read access when using RAID1. Other controllers can't do that. Trying some RAID1 configurations, I want to know if the read speed is faster both on a single file and on ...
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270 views

Can OS-X Snow Leopard Server run Parallels 5 with Win-XP and then have QuickBooks Multi user hosted there?

We have a 2.66GHz Mac mini Snow leopard Server with the HDs in a RAID1 configuration and we have a need to use Multi user QuickBooks 2009 Premiere Contractors edition. Can we install Parallels 5 on ...
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83 views

Debian source control and bug tracking server - what's a good backup plan?

I run a subversion source control server from my house on a debian machine. I will be setting up Jira for bug/project tracking very soon so I now have the necessary motivation to put a proper backup ...
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4k views

Can I rebuild degraded RAID1 on a SAS 5 i controller with a larger mirror drive size?

A drive failed on a Dell SAS 5i controller - see controller bios screengrab: http://imagebin.ca/view/SkZbszA.html The primary is a 160GB 10k sata drive. I added a 250GB 7k rpm drive in the hope that ...
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2answers
509 views

2 HDs in RAID 1 with 2 partitions?

i am not very familiar with raid partitons and am not even sure if this is the right place to ask about it, but i hope that if it is not that some one can point me on the right direction. This is my ...
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3answers
1k views

Exchange 2007 | Mailbox DB Size 180GB

I have a Exchange 2007 SP1 server running on Windows 2008 6 HD Drives in a RAID-1 OS, DB, Logs on separate RAID-1 Disks Size of the Mailbox Database is 183GB and increasing We only have First ...
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1answer
792 views

mdadm cron job sends email that cron has run

I've got an Ubuntu 8.04 server using mdadm to create several RAID1 arrays. I created /etc/cron.hourly/mdadm as follows: #! /bin/sh set -e mdadm --monitor /dev/md0 /dev/md3 /dev/md4 --oneshot ...
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1answer
2k views

Ubuntu: Monitor hardware RAID and notify upon failure?

I am using the 3ware 9650SE-2LP Raid controller for a 2-drive RAID 1 setup in some new Ubuntu 10.04 x64 servers. Is there a way for the server to send me a notification when one of the drives fails? ...
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2answers
881 views

raid 1 and high load average

i have a server with high load average, I think the problem is the raid 1. Server is in one or two points of load average, and in seconds jumps to 10 points (md4_raid1 process), this happens once or ...
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76 views

RAID1 Hard drives with Intel Controller

I have an older server with 2 35GB hard drives arranged as a RAID-1 drive. I have 3 open bays, I'd like to add 2 more hard drives to the open bays and have all 4 drives configured as a RAID-1 drive ...
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3k views

On-board RAID-1 or Software RAID on SUPERMICRO MBD-X7SBE Asterisk Heavy Use?

I am looking using the on-board RAID controller of my SUPERMICRO MBD-X7SBE to setup a RAID-1 array with two Seagate ES2 hard disk drives. We have around 8 or so of these in production. I am going to ...
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223 views

Compatibility Problem: Intel Server Chassis SR1500 + Windows Server 2003 R2 + Seagate Barracuda 7200.11 1.5TB

I got an Intel Server Chassis SR1500. Since there are 3 slots for hard disk, I put 2 Seagate Barracuda 7200.10 320GB to Slot 0 and 1 to make a RAID1. For the last slot (Slot 2), I put a Seagate ...
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744 views

How to determine if a CentOS system is Raid-1?

I've tried searching for this answer, but haven't found anything elegant. I have numerous servers in a colo that is in another state. I need to find a way to check that the servers have RAID-1 on ...
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2answers
464 views

Can I 'un-raid' my raid 1 setup

My dell T7400 has two 300G 15k SAS drives in a raid 1 configuration. I'd like to instead have a 300G 'C" drive and a 300G 'D' drive. Is there anyway to remove one of the drives from the raid ...
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2answers
327 views

RAID1 Broken Mirroring

I'm having a little server with Windows Small Business Server 2003. I'm using RAID1, via a HighPoint Rocket RAID 1640 RAID-card, using two harddrives. This week the server alarmed, and durig reboot I ...
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864 views

How to attach an existing RAID1 to a fresh Linux system?

I have a RAID1 currently operating on a single hard drive (yes, the mirror is absent). Is it possible to reorganize my system using the following algorithm? I set up another single-disk RAID1 (onto ...