Questions which refer to software RAID implementations.

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1answer
850 views

Recover Linux software RAID5 array after server upgrade

I recently upgraded a server from Fedora 6 to Fedora 14. In addition to the main hard drive where the OS is installed, I have 3 1TB hard drives configured for RAID5 (via software). After the upgrade, ...
17
votes
2answers
6k views

combining SSD and hard disk in software RAID1?

Does it make sense to build a Linux software RAID-1 (mirroring) using an SSD and a normal hard disk? I want to combine the advantages of SSD (fast transfer rates, fast access times) with the ...
0
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1answer
678 views

Software RAID performance/limitations in degraded mode

Trying to polish the final fine details of software RAID mission critical home-server solution. I am curious about the server performance in RAID-1 (mirroring) degraded mode (where one of the hard ...
2
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1answer
482 views

Software RAID and backup altogether

In this thread I've got most valuable tips regarding the home RAID solution options as well as their pros and cons: RAID for home use I've figured out for myself a few important points (the ...
0
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1answer
82 views

backuppc - will it work with flexraid (or similar)

Will backupcpc work with flexraid? What I do know is Backuppc must run under linux because of the hard links it uses, which means the file system I believe has to be a certain type other than ...
4
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3answers
3k views

Hardware RAID - what happens if the motherboard or controller fails?

I want to set up a RAID 5 array in a machine that has an intel motherboard. It has built in raid (sata). My concern is what happens if the motherboard fails? How can I take those hard drives ...
2
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2answers
309 views

Recover from failed recovery of software RAID5 failure

I have the pleasure ;-) to have been handed the task to try to get data off a server that had a RAID5 array problem and a failed attempt to recover it. Background: the computer in question is some ...
1
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1answer
168 views

OK to use Windows while a RAID array is building?

I've just put together a nice clean, fresh install of Windows 7 x64, and my two primary harddisks are building a software RAID1 array in the background while I type this. But I want to move over ...
4
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2answers
359 views

Harddrives to NAS

Is it wise to go for same brand/model for all the drives in a NAS, or is it ok to mix? What about mixing between different raid groups?
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1answer
92 views

Help with my RAID config

I've got a 250GB SATA2 hard drive. Yesterday I boughy myself a pair of 1TB HDDs which I intend to put into a RAID-1. If I enable the RAID functionality in the BIOS, I can setup the two drives in a ...
1
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1answer
471 views

Adding disk to windows-7 RAID-5

If I have a 3-disk RAID 5, and I want to add a 4th disk to the RAID, can this be done without moving all the data out of the existing raid array and rebuilding it as a 4 disk raid-5 array?
0
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1answer
50 views

What is the tolerated performance difference between HDDs?

I got a server with software RAID1 and two identical HDDs. Using hdparm -tT I get sligthly different results, one gives me 100Mb/s and the other one 97Mb/s. Is this difference tolerable in this ...
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2answers
518 views

Commercial NAS RAID1 disks moved to Software Raid system?

I've got a couple of commercial NAS boxes and I'm wondering if they (ReadyNas duo, DLink DNS-323) or any other NAS is suitable for having their RAIDed disks moved to a software-based NAS. To be ...
6
votes
3answers
4k views

Raid1 with active and spare partition

I am having the following problem with a RAID1 software raid partition on my Ubuntu system (10.04 LTS, 2.6.32-24-server in case it matters). One of my disks (sdb5) reported I/O errors and was ...
0
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2answers
351 views

Redundant storage of select files and synchronization between multiple computers

Historically, I've manually copied personal files onto multiple hard drives periodically to keep them backed up, but I just emptied my wallet getting certain files that were only stored in one place ...
2
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1answer
2k views

Auto-rebuild RAID6 with MDADM

I have an openSUSE 11.3 Linux computer with 5 disks of 1TB (WD enterprise disks) in it. With mdadm I configured a RAID6 device. Now, after a lot of thorough testing, I've noticed that when the ...
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1answer
2k views

Should I include my OS partition on my RAID or separate hard drive?

I plan to build a Linux (Ubuntu 10.04) home file server soon with 3-5 x 2TB hard drives in RAID 5 software raid but I'm not experienced with setting up RAIDs. Should I include the actual Linux host ...
0
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3answers
4k views

Software or Hardware RAID for Home Server?

Now I have searched Server Fault and Super User and have seen that some people recommend software and some people swear by hardware RAID, but I am looking to use it on a home server of mine to store ...
2
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1answer
1k views

external drive enclosure -> software RAID 5?

I have two older PCs on my LAN posing as 'servers'; one running FreeNAS off a USB stick using three 500GB HDDs in a ZFS RAID-Z pool serving as storage for the LAN and one running Debian Lenny with an ...
5
votes
1answer
13k views

How can I add a RAID 1 array in Ubuntu 10.04?

I have an existing Ubuntu 10.04 desktop system setup and running on a hard drive (drive A). I'd like to add two more hard drives (drives B and C, same size) to the system and mount them as a RAID 1 ...
14
votes
2answers
11k views

Does software RAID 1 in Windows 7 improve read speeds?

Does software RAID 1 (mirroring) in Windows 7 improve read speeds? I'd like to set up RAID 1 to help protect my important documents (yes, yes, I know it's not a backup), but performance is also ...
0
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1answer
287 views

What would happen in a Software Raid 1 of one HDD and one SSD?

I'm running my Windows 7 installation and all of my apps from an SSD for performance reasons. Since SSD's can instantly die at any moment, I'm looking for some kind of data backup strategy. Right Now ...
0
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1answer
157 views

Replace mainboard without damage software RAID

I am currently using software RAID on Ubuntu 10.04. Since my mainboard only supports DDR2, I want to replace it with another one. However, I'm worry about the software RAID damaged. Will the Ubuntu ...
2
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2answers
2k views

Raid 1 mdadm (linux) disk failure recovery: DRDY err (UNC) keeps repeating can't reach login

Over the weekend, I got several emails from our network storage server (just a custom box with CentOS 5 and 2 2tb drives software raid 1) indicating SMART detected issues with one of the drives. I ...
2
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1answer
551 views

Software RAID 5 with Multiple Partitions (one encrypted partition)

Can I have multiple partitions using Software RAID 5 on an Ubuntu Server? For example, say using a 4 drive RAID 5 setup, I want one massive partition for storage and a second smaller but encrypted ...
2
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1answer
444 views

How to plan a RAID 5 for expandability?

I'm planning on building a home file server with a few 2 TB drives and I wanted to use software RAID 5 under Linux (most likely ubuntu). Before I start, I wanted to know how easy is it to expand a ...
2
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2answers
696 views

Converting software RAID1 to hardware RAID1 without losing data

I have a home server running Ubuntu Jaunty and housing a 2 x 2TB RAID1 array. It is a software RAID but I'm looking to pull out those drives and put them in a external RAID enclosure to save space. My ...
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1answer
1k views

Can't boot system with raid1

I installed ubuntu server 10.04 on a PC with two HD drives 500 GB each. I used raid1 to provide data protection. After the installation has completed, the system did not boot properly. I got the ...
2
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2answers
512 views

Where is the Missing Disk Space on Linux Software Raid

Purchased (4) 2TiB Drives (actual disk space) and created a RAID5 array expecting to have 6TB of useable disk space, however actual useable space is 5.46TiB. So, the question is where did the disk ...
0
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3answers
898 views

Software RAID0 with drives of drastically different sizes

Is it at all possible to do a software RAID0 (with Ubuntu Server, installing Crunchbang on it though) with drives of drastically different sizes? One of the drives is 250GB while the other is 60GB.
5
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2answers
3k views

Linux RAID1 with only One disk

I have a hypothetical situation in which I installed my operating system using a RAID1 mirror. At some point I decided that this setup was overkill, my machine isn't system critical, I value doubling ...
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1answer
209 views

Reinstall linux with software RAID

I've got ubuntu server on my "home server" with 5 software raid 0 partitions and one software raid 1. I have to reinstall OS. Is it possible to do that without losing existing partitions with data?
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1answer
863 views

How can I downgrade a linux raid0 setup to use a simple partition

I set up my desktop machine to use software raid 0 in ubuntu when I first set it up. Because it turns out that recovery from upgrading ubuntu (which always breaks things) is harder with /dev/md0 than ...
2
votes
1answer
209 views

Does Mac OSX software raid support partial resync?

If I have a software RAID-1 (mirror) setup in Mac OSX and I turn off the system during mirror rebuild, when I turn it back on will it start a whole new resync or just do a partial resync (like linux' ...
1
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0answers
493 views

proper procedure to repair RAID 1 volume in Windows Server 2008 R2

I'ave a windows server r2 with the following configuration 500mb SATA for OS 2 x 1TB SATA in Software Raid 1 (done through the operating system) One of the 1TB drives are bad. What will happen ...
2
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2answers
1k views

Should I use Bios or OS (Win7) raid on my new computer

Which is better in terms of performance first and reliability second, the onboard bios RAID on an Intel 1156 P55 motherboard or using the built in RAID options in Windows 7 Ultimate. I will be using ...
4
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4answers
2k views

Software RAID on dual boot Windows and Ubuntu

Can I successfully implement a software RAID even when I use both Windows and Ubuntu? What software tools in both OSes that can help in this regard? I have 1TB sata on ASUS m4a78T-E and I wish to ...
2
votes
3answers
2k views

RAID-1 - hardware or software?

I've been looking to set up a pair of RAID-1 (mirrored) drives for data archiving. My first reaction was to just go out and get an enclosure with 2 drive bays and a built-in RAID-1 controller. After a ...
2
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2answers
882 views

What versions of Windows support built-in disk mirroring?

I know that some editions of Windows has built-in support for disk mirroring. But on my computer with Windows Vista, I can't find it. What editons of Windows has built-in support for disk mirroring ...
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1answer
798 views

How do I activate software raid-1 in Windows?

I use Windows Vista Ultimate, and have four disks of 500GB. Windows is already installed on one disk, the systemdisk. Now I would like to mirror the system disk using Windows built-in software raid. ...
0
votes
1answer
1k views

mdadm device missing

after a reboot my /dev/md0 device was missing. This is a RAID-1 array from two partitions of two harddrives. On each of the harddrives is another partition, which together belong to dev/md1. However, ...
0
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1answer
100 views

Partitioning 2 SSDs of different capacity for RAID 1

I have two SSDs. One has 64G the other is 32G of size. I'd like to create a RAID 1 configuration with Linux (it would be a software RAID), and I'm wondering if what I'm planning is possible or wise: ...
2
votes
2answers
3k views

misaligned raid partition in Ubuntu 10.04

I attached two identical hard drives to my linux machine. Then using gparted I formated the first 1024 mb at the beginning of each drive as linux swap space. Then I went into ...
3
votes
1answer
964 views

ubuntu 10.04 softRAID 5 partition scheme

I'm trying to create a RAID 5 array which will contain the Ubuntu installation itself. I tried this partition scheme: 2.0 TB for / 6.0 GB for swap This was as per the instructions provided by ...
1
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1answer
356 views

Paritions “appear” in my raid 1 array after reboot, and the partitions in the array have changed names

I am moving my Ubuntu install to lvm over raid 1. I created the arrays with only 1 disk initially, planning to add the second disk later. I got the files moved and the system booted up succesfully on ...
5
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1answer
1k views

Automatic Notification of Degraded RAID Array in Ubuntu

I'm running Ubuntu 10.04 on top of a RAID-1 array. Out of curiosity, I decided to bring up the "Disk Utility" program to inspect the status of my array. To my surprise, the array was listed as ...
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2answers
423 views

Re-Initialize RAID-0 in software after card failure

I'm working on a Friend's WD MyBook "1TB" HDD that is not mounting. When I got in to it, I discovered that it is really 2 500GB HDD's set up as RAID-0. It appears that the drives themselves are ...
0
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3answers
70 views

Bad mobo or drives?

I have a gigabyte UDR5 with 12GB Ram, and i7 920. The os runs of 2 x 80GB x25 SSDs in raid0 (mobo software raid) and I have 4 x 320GB raid5 for storage (2 year old drives). Running windows 7 Ultimate ...
2
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1answer
149 views

Optimal Raid Setup / Usage suggestion [closed]

[Edit] So rather than have HDDs goto waste, I'm looking for some suggestions of implemenation of a RAID setup. Questions to be answered: Using Windows 7 and the following HDDs, is the following ...
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1answer
1k views

how to boot a linux software raid from member disk

i want to boot a working raid-1 linux system from just one of the member disks. i imagine, this could be done with a grub boot parameter, but i'm not sure. reason is, that the vmware P2V converter ...