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Questions tagged [raid1]

RAID 1 or Mirrored RAID uses two or more disks that store the same data.

RAID Level 1 or mirrored RAID uses two or more disks that store the same data. One disk is mirrored to the other. Write speeds are the same as using one disk, and read speeds are twice as much.

RAID 1 is used when reliability needs to be higher than normal.

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File corruption when copying different file on raid 1

I have a RAID 1 configuration of 2 1TB drives on a Fedora 12 box. Most of what is stored there are video files that are numerical labeled. The problem I'm having is that I had one of the video files get corrupted. I copied a replacement from a…
Stephan
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sda1 (?) raid failed on debian - what to do now?

ispconfig says that my server has raid problems. The server is not mine, it is rented from a hosting company. The OS installation was not my business: the hosting firm did it. cat /proc/mdstat Personalities : [raid1] md0 : active raid1 sda1[2](F)…
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Sync SSD to spindle drive using RAID or DRBD

I'm setting up a server with and SSD as the primary drive, and would like to duplicate the data onto a cheaper drive as a block-level backup (à la RAID1). Since I don't want to hobble the performance of the SSD I was considering setting up DRBD with…
tylerl
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RAID 10 or RAID 1 x 2 for Hyper-V with AD, EXCHANGE on Windows 2008 R2

We have 2 servers which have 6 SATA 7200 disks inside (each). We want to configure both servers so that they will have Window Server 2008 R2 Enterprise installed and on top of it Exchange 2010 x2 (for 300 people) as one virtual machine and AD x2 as…
MadBoy
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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 /dev/vg0/secure is encrypted using dmcrypt with LUKS and…
jdelic
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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 what I have read around, RAID1 with madam doesn't…
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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. To get the RAID to work, I set it up using…
user64744
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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? I would prefer an e-mail notification if…
Andrew Ensley
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mdadm: power failure during raid1 rebuild

RAID1 array created with mdadm; array was rebuilding when there was a power failure. On coming back up, the array seems to be dead. # cat /proc/mdstat Personalities : [raid1] md0 : inactive sdb1[2](S) sda1[3](S) 15627751424 blocks super 1.2 # mdadm…
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Add btrfs devices to raid1 array, increasing total size

I have a btrfs array comprising of two 2TB disks in raid 1. I am running out of space, and I want to add two 3TB disks that I have lying around. The final setup will be 2x2TB+2x3TB drives. One drive failure redundancy is sufficient for me (the data…
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Windows Server 2012 Raid 1

I have a question that might seem like a very basic or noob question but here it goes. Quick back story: Our company has an HP server that holds the databases etc for our POS PC / Cash Registers. The server and our 4 POS systems have been on a lease…
Mr Riksson
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Trouble Installing Ubuntu Server on PowerEdge R330 (Hardware RAID1)

I'm having trouble installing Ubuntu Server 16.04 LTS on a hardware RAID-1 setup on a new Dell PowerEdge R330 Server. I'm using a bootable USB made by Rufus-2.18. (I'm a newb to server setups, so please excuse me for anything ignorant I missed or…
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Raid 1 from already initialized disk

I have 4TB disk (A) with data in it. Now I've bought a new 4TB disk (B), and I want to start a RAID1 so that B becomes the mirror of A, without loosing data on A. I'm under linux with mdadm tool. The only guides I've found by googling are referring…
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How to set up system-drive RAID1 on Server 2016 with two HDD larger than 2TB?

Foreword: As much as I tried to search the internet, most of the tutorials are for regular smaller than 2TB drives. And there are tons of forum posts that say "use hwraid". And I found a method that worked for me, see the 'dd method', but I am sure…
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How should I increase the size of a raided server?

We have a server that was set up with an ubuntu software raid setup in raid 1 with 2 6TB hard drives so that we have 6TB of storage available and backed up so we are safe if one of the hard drives fails. I want to add 2 4TB hard drives to increase…
SomeRandomPhysicist
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