Questions which refer to software RAID implementations.

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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
467 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 ...
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3answers
844 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.
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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
206 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
779 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
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1answer
203 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' ...
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0answers
457 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 ...
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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 ...
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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
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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 ...
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2answers
824 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
734 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
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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: ...
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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
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1answer
942 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 ...
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1answer
337 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 ...
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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
407 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
69 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 ...
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1answer
148 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 ...
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1answer
642 views

Windows7 Create Striped volume

I'm trying to raid0 a data partition on two disks in Windows7 Pro 64bit. Both drives are identical, partition scheme is identical, I have converted them to dynamic disks. But all the raid options in ...
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2answers
3k views

Thinking of a RAID-5 Setup - What is the optimal configuration?

I am planning on setting up a RAID 5 array on my data storage drives using Windows Server 2008 software RAID. I currently have a 500 GB drive for the server OS and two 1 TB drives for data storage. ...
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2answers
2k views

Is it normal for Windows Software Raid (Mirroring) to slow a drive's performance?

I've been doing some performance tests on a few of my drives lately, trying to figure out which combination of drive/raid-level(or not) will give me the best performance (for Hyper-V incase anyone's ...
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3answers
2k views

Will mirroring with an SSD improve read performance?

If you use Windows 7 to mirror a volume across an SSD drive and a mechanical hard drive, will the read performance be similar to a single SSD drive? I.e. is Windows smart enough to read from them ...
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2answers
307 views

Reliable Linux RAID Card

Can anyone recommend an appropriate RAID card for use under Linux (Ubuntu)? I have three Western Digital SATA drives, and would like to setup either RAID-1 or RAID-5. Software RAID has been very ...
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2answers
335 views

Need hard disk recommendation for linux home server

I'm planing to build a little linux homeserver. It will mainly be used for storage and maybe as an media pc. I plan to build a software raid5 with 4 1.5TB or 2TB hard drives. I already decided to ...
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1answer
691 views

What will happen with my RAID5 after motherboard change?

Currently I have ASUS P5Q-EM and 3 HDD in RAID5 using it's on-board RAID controller Intel ICH10R. I want to bye a new motherboard, for example, Gigabyte GA-EQ45M-S2 which also have on-board RAID ...
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2answers
371 views

looking for a solution for a Software Raid on my XP computer

Recently, I purchase 2x1TB drives for my XP computer, I want to use RAID 1 for the redundancy, but the motherboard is little old and can't support that. Some articles introduce how to make it happen ...
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7answers
10k views

Onboard RAID vs Software RAID

My motherboard, an Asus M4a79t Deluxe, advertises RAID 0/1/5 capabilities. My limited understanding is that onboard RAID is better than software RAID. Is this necessarily true? Is an onboard RAID ...
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4answers
2k views

How do I diagnose a bottleneck in an Intel Atom based Ubuntu server?

I have a small media server at home which has software RAID and a gigabit link to the rest of my network. For some reason though, I only get ~10MB/s transfers when copying to/from the server. I use ...
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1answer
2k views

Resize a RAID 1 volume on OS X Snow Leopard - how? (Note: software raid)

I've scoured the Internet in search of an answer to this question, and as usual with OSX-related topics, I often don't find any deep-dive technical explanations sufficient enough to feel confident ...
3
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2answers
12k views

How to install Windows 7 onto software RAID-0

I recently got a new laptop (Asus G73JH-A2) which has two identical hard drives in it. Unfortunately the motherboard does not have a RAID controller. What I would like to do is run the drives in a ...
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2answers
86 views

Which RAID setup to use for a build-computer?

I am wanting to setup a computer(actually multiple with the same setup) to build and compile programs. Security of the data is not important, and space for the most part is not important. (as in, 40G ...
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8answers
70k views

How to get an inactive RAID device working again?

After booting, my RAID1 device (/dev/md_d0 *) sometimes goes in some funny state and I cannot mount it. * Originally I created /dev/md0 but it has somehow changed itself into /dev/md_d0. # mount ...
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1answer
6k views

Can I setup a software RAID in Windows 7 using Virtual Hard Disks?

Well, the title of my question pretty much sums it up, but let me elaborate. The main idea of what I want to do is as follows: 1) I have two separate hard disks, with nearly equal performance. I use ...
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2answers
2k views

Create a mirrored array using an existing drive

Using OS X, I have a 1 TB hd. I have an empty 1 TB that I want to use to create a mirrored array. All the instructions I can find about creating the mirrored array require copying the existing hard ...
2
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3answers
223 views

RAID level hard drives?

My Motherboard has 4 internal SATA ports. I am considering a linux software raid. I plan to use this for backing up my work movies, music etc Do I need to spend the money on RAID Level drives? Or am ...
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2answers
387 views

How do I setup a software raid 1 on 2 newly installed HD's in ubuntu

I setup a HTPC about a month ago, and just expanded my storage by adding two 750GB drives in addition to my OS drive. I am using Ubuntu 9.10 as my OS and need help setting up a raid 1 on the two ...
2
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1answer
1k views

Access Western Digital My Book World II RAID array on my Ubuntu Linux

My WD My Book World II (Blue Rings) NAS has overheated, I think the motherboard is dead. I extracted the disks and plugged them in my desktop PC running Ubuntu Linux. The disks seems to be alive, ...
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1answer
528 views

raid 1 + OS drive windows 7 ep45 ud3p

I have an existing drive with my OS and data on it, because of shortage of storage, I bought two Samsung 2TB drives to form a RAID 1 configuration. I understand that RAID 1 is a redundancy config. - I ...
6
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3answers
11k views

Creating a RAID1 partition with mdadm on Ubuntu

I'm trying to set up a RAID1 partition on my Ubuntu 9.10 workstation. On this dual-boot system, Ubuntu is running from a separate drive (/dev/sdc - an SSD that is quite small, which is why I need ...
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2answers
3k views

Is it possible to enable software RAID 1 on Windows XP system partition?

I have heard, that it should be somehow possible to use just one partition with Windows XP, and be able to mirror that by enabling RAID 1 in XP. I'd appreciate tips how to do this. If this is true, ...
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2answers
2k views

Any performance gain by putting Windows Pagefile.sys onto an Software RAID-0 Striped Volume?

I have a workstation class laptop running 64bit Windows-7 with 8GB-RAM (expandable to 16GB) and Dual SATA2 7200rpm disks. I know my system will be making heavy use of the pagefile since I will be ...
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3answers
3k views

optimal SATA SSD configuration in new PC

I'm sold on SATA SSDs for my next PC but since their prices grow un-proportionally to their size, I'm wondering what would be the best configuration for them (for OS and Programs) would be: 2 SSDs ...
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2answers
714 views

Setting up an 8 drive raid for home use - hardware configuration?

I wish to build an 8x1.5tb file server for home use. I was looking at putting these 8 HDDs into RAID 5 or 6. However most botherboards only come with 6 sata ports so I will obviously need to get an ...
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5answers
1k views

Windows Software RAID 5 Drive Failure Notification

I plan on creating a Windows software RAID 5 array but need to know when a drive goes bum. I don't plan on wanting to check the server every so often, so how can I have an email sent when a drive ...
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1answer
6k views

How do I associate linux scsi device names with disk devices?

I have a CentOS 4.x server running software raid. The server has two scsi disks in hot-swap trays. mdadm reports that the raid has failed, and so I would like to replace it. I examine /proc/mdstat, ...