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Questions tagged [software-raid]

RAID solution handled by the operating system.

Software RAID is implemented in the OS. It uses CPU to handle the RAID setup. It is cheaper than hardware raid. It often doesn't support features which you can find with hardware raid like:

  • hot spare
  • fast rebuilding of an array
  • hot swapping
  • high write throughput

Another problem is that it uses the CPU and memory of the computer to perform all the tasks (hardware raidcards have a special cpu and memory for this task). Therefor generating more load on your system.

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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 the array without having to pull the data off and…
mahle
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mdadm on ubuntu 10.04 - raid5 of 4 disks, one disk missing after reboot

I'm having a problem with the raid array in a server (Ubuntu 10.04). I've got a raid5 array of 4 disks - sd[cdef], created like this: # partition disks parted /dev/sdc mklabel gpt parted /dev/sdc mkpart primary ext2 1 2000GB parted /dev/sdc set 1…
Ben Williams
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OpenFiler and Raid 1

I am looking to deploy a new OpenFiler NAS box. I have setup 2 1TB drives for Raid 1 (software raid built into OpenFiler)and the boot is on a 320GB HDD. When trying to simulate a crash (remove one of the 1tb drives)the system hangs...and…
CZhale
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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 14) my Windows 2008 R2 server just crashed and…
userb00
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Rosewill RSV-S5 and WIndows Server 2008 RC2 Software Raid

I have just bought a Rosewill RSV-S5 http://www.newegg.com/Product/Product.aspx?Item=N82E16816132015 because i want to move the hardisks out of my case. I have 5 disks now in a software raid 5, made in Windows Server 2008 RC2. My question is can i…
Androme
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2nd drive in RAID 1 keeps failing

I have a bit of a problem here. I have a Ubuntu Linux server set up with 2 SAS drives in a software RAID 1 (created with mdadm). The RAID will run fine for a day, I can do cat /proc/mdstat and it shows that both disks are active and everything is…
Safado
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Raid array Devices are not removed

cat /proc/mdstat Personalities : [raid1] [raid0] [raid6] [raid5] [raid4] [linear] [raid10] md11 : active raid10 sde1[3] sdj1[4](F) 286743936 blocks 64K chunks 2 near-copies [4/1] [___U] [1:1:3:0] [=>...................] resync = 8.0%…
santhosha
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Cannot replace broken drive in software mirroring

I'm running a SBS 2003 server which uses Microsofts software RAID, mirroring mode. A few days ago, one of the disks started to show problems, and a new one was aquired. However, I can't get it to replace the old one (The disks are same make and…
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add new partition - software raid - windows 2008

I order a new web server , windows 2008, it has 2 hard drives which has software RAID1. I need to split hard drive to 3 partition, how can I do this? Thanks
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Can't transfer software RAID-5 volume from Windows Server 2008 R2 to Windows 7

I have a very strange problem with MS SW RAID-5 volume. On a workstation, I have Windows Server 2008 R2 with System volume (HW RAID 1) and Data volume (SW RAID 5, consisting of 4 disks). I wanted to install Windows 7 Ultimate there, so I replaced…
Robert Goldwein
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Mirrored and stripped HD drives in Raid10

I have ubuntu server 10.04 installed on a Raid10 array (MD) using 4 HD drives. As it is known, Raid10 is Raid 1 + Raid 0. So, two HD drives are stripped and they are mirrored (or the other way around). Is there an easy way to figure out which two of…
Khaled
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Server doesn't detect/show partitions of disk in /dev

for some reason one of my disks doesn't show its partitions in /dev/, however when I check it with cfdisk they are there, and writing the partition table to it again makes them reappear. This is kind of annoying as I want to use it in a raid config,…
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How do I replace a raid-1 software raid array on Mac OS X with a larger one?

Here is my current situation: Mac Pro Server with 1x normal OS drive and 2x 750Gb data drives in a raid-1 configuration. I'm starting to fill up the space on the data drives and would like to replace the array with a set of 2Tb drives. There are…
user57821
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How to install Ubuntu server on a Dell R210 with S100 raid controller

I'm trying to install Ubuntu server on a R210 with a S100 raid controller. It's a software controlled RAID, and it's not recognized in Ubuntu. So I guess I have to disable it and use the software raid provided in Ubuntu (mbabm). I'm a bit lost about…
Jonathan
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Expand Windows Server 2008 RAID 5 array

I have a Windows 2008 Standard server. It currently has 3x 1TB drives in Software RAID 5 (as per the Disk Management Console). I need to add another 2x 1TB drives. Is there any way to add these two disks into the existing RAID 5 array without any…
Mark Henderson
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