Questions which refer to software RAID implementations.

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1answer
255 views

Windows 7 Mirroring Drive Failure

I had a few questions when a drive fails that is setup with software RAID 1 in Windows 7, e.g. Dynamic disk mirroring: Will it still boot using the good drive (assuming boot drive is RAID 1), or ...
3
votes
1answer
280 views

I'm trying to mirror drives of the same model, but one appears to be slightly larger

I'm trying to mirror a drive using Disk Management in Windows Home Server 2011. The target drive (Disk 1) is the exact same model as the source drive (Disk 0), but the target drive appears to be 1MB ...
1
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1answer
3k views

Performance of RAID 5 with mdadm

I have set up a software-raid 5 with mdadm on a 1.3 GHz AMD Neo 36L dual core machine using 3 1.5 TB Seagate Barracude Green drives (4k sectors). The chunk size of the raid is 512 KB. On top of the ...
4
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3answers
401 views

Three-way mirrored RAID in Windows 7?

I sometimes find bit-rot in some of my files. This is rare, but does happen. It annoys me that this is a) undetected for long periods of time and b) not fixable (except from backups), even with the ...
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2answers
916 views

Does chunk size affect the read performance of a Linux md software RAID1 array?

This came up in relation to this question on determining chunk size of an existing RAID array. The general consensus seems to be that chunk size does not apply to RAID1 as it is not striped. On the ...
2
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2answers
11k views

How to install software RAID using Mint Live CD

I wish to install Linux Mint 11 with RAID 1 for my /home. I was wondering if I can install RAID 1 during the installation from the Live CD. I have managed to set up RAID from the Live CD and install ...
0
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1answer
452 views

How can I deal with a full striped volume?

I created a striped logical volume in Windows 7 x86 that is across 3 x 2TB drives. It's almost completely full, and I smacked my forehead when I realized today that you apparently cannot add drives to ...
2
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2answers
3k views

How to setup RAID 5 - Windows Home Server

I am planning to install Windows Home Server 2011 on my new mini server. I have 3 x 2TB hard drives and another hard drive for the OS. I can't find any tutorials on how set up RAID 5 on Windows Home ...
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3answers
4k views

Bad performance with Linux software RAID5 and LUKS encryption

I have set up a Linux software RAID5 on three hard drives and want to encrypt it with cryptsetup/LUKS. My tests showed that the encryption leads to a massive performance decrease that I cannot ...
4
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2answers
1k views

P4 vs. I3/i5 *T in power consumption and performance

I am running an Intel P4 prescott with HT on my home server (linux file server on encrypted disks on software-RAID5 and virtualisation host for three further machines). The performance for this ...
0
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1answer
406 views

Possible to load old software raid array on new system? Ubuntu

I am looking into a more redundant solution to my home server. I know raid is "not" a backup, but I am looking into a raid 5 solution for these reasons. I would be very annoyed if I lost my data, ...
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1answer
864 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
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2answers
7k 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
693 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
513 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
312 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
169 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
365 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?
1
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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
475 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
530 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 ...
7
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 ...
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2answers
368 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
14k 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 ...
15
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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
288 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
559 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
votes
1answer
461 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
725 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
votes
2answers
529 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
951 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
211 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
954 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
213 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
533 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
votes
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
921 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 ...