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

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How to resize RAID1 array with mdadm?

I've running Ubuntu 11.04 (kernel 2.6.38-11). I replaced 2x160GB with 2x500GB drives. They are configured as RAID1. The partition tables show the right sizes. Here's sfdisk: # sfdisk -d /dev/sdb # ...
2
votes
1answer
265 views

booting a system with failed devices in a RAID1 array

I have a Linux system set up with 3 software RAID1 devices, each of which comprises two identical partitions on two identical disks. Recently, one of the non-root partitions on one disk began ...
1
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1answer
211 views

Harddrive / Raid1 issues

I'm having problems with the hard-drives in my root-server. It's running with 2 hdds in a software Raid1. After having performance issues with a large MySQL DB, that writes via O_DIRECT and ...
2
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2answers
386 views

Motherboard fried on Windows RAID 1 System, do I have to reformat?

A faulty power supply fried my motherboard and I need some help. I had a spare motherboard lying around and hooked it up to one of the hard drives to see if I could just continue chugging along. ...
2
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1answer
5k views

grub2 does not find /boot on RAID1 md0 device

I have RAID1 md0 for /boot consisting of 4 partitions (sda2, sdb2, sdc2, sdd2). I'm using GPT on 2TB HDDs, so first partitions on each disk (sda1, ...) are 1-megabyte bios_grub partitions. I also ...
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1answer
2k views

SCSI error: return code = 0x08000002, sense key: Aborted Command

The kernel logs: ata2.00: exception Emask 0x0 SAct 0x7fffffff SErr 0x0 action 0x0 ata2.00: irq_stat 0x40000008 ata2.00: cmd 61/08:f0:6f:5b:97/00:00:00:00:00/40 tag 30 ncq 4096 out res ...
2
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1answer
706 views

Hot swap failed software RAID drive with Windows Server 2008

Does Win2k8 natively handle hot-swapping of a hard drive? I have an existing server with 2 hard drives in it that are currently setup in a hardware RAID-1 configuration; they are each hot-swappable. ...
0
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2answers
240 views

Converting system disk to raid 1 on win server 2003

I have a domain controller running windows server 2003. Its running on a basic entry level server. I would like to improve redundancy by converting the disk to software raid 1. I'm looking for any ...
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2answers
1k views

Clarifications on encrypted LVM in Ubuntu, RAID1, and headless server

I’ve pondered about encrypting my hard disk on my laptop and server for quite some time, but never got around to it since I don’t think I understand how encryption affects my day to day usage and the ...
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3answers
3k views

howto import existing linux soft array volume group

I have a server that consists of a boot drive, then two data drives combined to a RAID1 linux array. My boot drive recently became corrupted and I need to re-install the operating system. The RAID1 ...
0
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2answers
491 views

how to get block sizes larger than 4k in reads from an md raid1 volume

I wanted to setup a raid01 configuration (a raid1 composed of two raid0s) with one of the raid0 volumes having the write-mostly state set so all reads would go to the other (i.e. one is disk, the ...
0
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1answer
857 views

Windows 2008 R2 raid 0 over hardware raid 5

I am consider using windows raid 0 and raid 1 over two hardware 4x2tb raid 5 arrays. (thinking Seagate green drives). 2x Rocketraid 2680 controller but that could easily change. So, that would give ...
4
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1answer
2k views

Very slow write performance on Debian 6.0 (AMD64) with DMCRYPT/LVM/RAID1

I'm seeing very strange performance characteristics on one of my servers. This server is running a simple two-disk software-RAID1 setup with LVM spanning /dev/md0. One of the logical volumes ...
3
votes
3answers
1k views

RAID1 performance with madam

I am looking into performance issues we are having. We currently have a 4 drive RAID5 (3+1 fail over) and read performance sucks. Looking at RAID1 with 2 drives (maybe more, any benefit?) but from ...
0
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1answer
496 views

Linux (FC14/i386) is raid1 intact after hot fs install? How to repair?

My older (FC11) install had reached EOL, and I tried to reinstall FC14 on its RAID1 root filesystem. I'm now having suspicions that now, after the install FS is not fully raided. The question is if ...
0
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1answer
369 views

How to tell a disk failure in RAID1

I have an old Dell poweredge R200 in collocation which has 2 hard disks in RAID 1. I am wondering how should I know if one one the disks is failed?
0
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1answer
1k views

Raid1, one disk displaying SMART errors:

I have a HP Pavillion machine, and I'm using the RAID controller built into the motherboard (H-RS880-uATX, some consumer grade RAID controller, not sure who). I got a slew of event log errors from ...
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2answers
164 views

RAID disk format / transferability between controllers

A couple of RAID questions. I think I know the answers, but just wanted to double-check since I am about to play will several years worth of personal data. Do I understand correctly that: If I have ...
0
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1answer
285 views

How to increase size of Raid 1 Allocation?

We had Raid 1 setup with two 1tb drives. I have swapped out the drives and now it was on two 2tb drives, however, the raid array is still only 1 tb in size. Is there a way to increase the size of ...
4
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1answer
724 views

Can you use drives while Raid 1 is rebuilding?

I am going to be rebuilding a raid 1 array. While the rebuild is happening can people still read/write to data in the array?
2
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1answer
415 views

How can I increase the size of a RAID array on the fly?

Right now we have RAID 1 running on 2 1TB hard drives. They are nearly full so I would like to replace them with a 2 TB drive. Is there a master/slave with RAID 1? Am I able to just pull one of the ...
0
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1answer
1k views

Setting up Raid 1 in a dell poweredge R300 server

Hello everybody i have a dell poweredge r300 server, and i want to set up Raid 1, how can i do that? thnx. PS: i cant access to the utility mode.
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5answers
1k views

Kernel panic error

We have a dedicated server with software RAID1 and one of the disk failed recently. The disk was replaced but after rebuilding the array and rebooting the server freezes with a Kernel Panic message ...
0
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1answer
440 views

Raid 1 Mirror - weird data loss for 1 month

I have been running windows software RAID 1 (mirror) on Windows 2008 R2 for a while and recently I experienced something very odd, hope someone can help explaining and share your view. Yesterday (Mar ...
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2answers
11k views

Proliant RAID 1 Rebuild Questions

I have a HP Proliant ML350 G5 server that experienced a power supply failure overnight. The power supply was replaced but unfortunately it got restarted with only 1 disk in the RAID 1 set plugged in. ...
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3answers
3k views

Linux Software RAID1: How to boot after (physically) removing /dev/sda? (LVM, mdadm, Grub2)

A server set up with Debian 6.0/squeeze. During the squeeze installation, I configured the two 500GB SATA disks (/dev/sda and /dev/sdb) as a RAID1 (managed with mdadm). The RAID keeps a 500 GB LVM ...
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4answers
95 views

Breaking a RAID 1 as a way to Provision systems?

Suppose that I have a nix system whose filesystems are entirely supported by two drives in a RAID 1. If I were to breakdown that RAID, could I then use one of the disks to recreate the system on ...
0
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1answer
174 views

Switching from Raid1 to Raid10

we are running a Dell Server with a PERC5i Raid card using a Raid1 setup. Now we are hitting a performance problem with our harddrive performance and think about switching to Raid10. Which steps are ...
1
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1answer
224 views

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 ...
0
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2answers
457 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 ...
0
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4answers
772 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 ...
0
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4answers
787 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, ...
0
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1answer
281 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 ...
6
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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 ...
0
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1answer
3k 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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4answers
2k 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 ...
2
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1answer
720 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. ...
6
votes
3answers
684 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 ...
0
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1answer
308 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
486 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 ...
0
votes
2answers
241 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 ...
3
votes
4answers
385 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
284 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
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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
526 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 ...
0
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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 ...
0
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1answer
550 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 ...