There are a number of RAID levels which provide improvement of performance and/or hardware redundancy. See raid tag for examples of RAID configurations. This tag refers to implementations where the RAID is built in software (BIOS, OS Kernel, or user-space) rather than on the hardware (such as a ...
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A ZFS or LVM or MD redundant heterogeneous storage proposal
I have the same problem most people have: how to create a reliable personal storage solution with the fact that:
Hard drives fail with alarming regularity. Losing files is unacceptable.
I will buy ...
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mdadm raid5 read error not correctable
I have a software raid5 setup existing of 4 disks.
sda, sdb, sdc, sdd
Since everything was up and running I wanted to test the array. To do this I pulled the plug on one of the disks (sdd).
Everything ...
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How to identify raid1 disks
I would like to know how mdadm identifies physical disks of raid1 .
I think it is managed by uuids not device file like /dev/sdc2 /dev/sdd2.
But I can`t confirm such information of raid1.
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XFS Can't Read the Superblock
I awoke this morning to find an email from my RAID host (Linux software RAID) telling me that a drive had failed. It's consumer hardware, it's not a big deal. I have cold spares. However, when I ...
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Is there any freeware software to ghost a RAID 1 disk?
Where I can find freeware software to ghost a RAID 1 disk?
I installed Windows XP on a Dell server with a supported RAID card. I tried to ghost it using FOG project, but I think it doesn't support ...
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2answers
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chkdsk on a mirrored drive
I am running Windows 7 and have two 1TB hard drives mirrored using Win7 disk management. (They are not the system disk.)
I am getting NTSF Error events that say "The file system structure on the ...
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1answer
45 views
Win7 soft-RAID failed, computer “jumped back in time”
I just rebooted my computer and upon logging into Windows, things seemed a little bit "off". I figured out rather quickly that everything was like it was two weeks ago. It was literally like ...
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52 views
Resize a raid1 ntfs partition
My computer is running windows 7 on a software raid1 (ntfs obviously) partition.
I would like to reduce the size of the partition (currently the on whole disk) to install a raid0 (or 1 I don't know ...
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2answers
79 views
How do I mount a software RAID1 (mirror) created by windows in Linux using mdadm?
I'm switching my Windows server to Ubuntu and am trying to get my software RAID1 (mirror) that I created in Windows to show up in Ubuntu. I have read that this is possible here using mdadm, but I'm ...
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68 views
degraded mdadm RAID5 array
My /dev/md0 array just died last night. I got this email
This is an automatically generated mail message from mdadm running on
A Fail event had been detected on md device /dev/md0.
It ...
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2answers
39 views
improving an old pc - using two HDDs
I have an old Athlon machine with 1.5GB ram and two HDDs and will install Windows 7 on it (for my mom to browse and mail). Can I get some extra performance out from the two disks? I see two scenarios:
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43 views
Is Online Capacity Expansion possible in Windows 7 software raid?
Many low-end raid cards now offer Online Capacity Expansion (OCE) and Online Raid Level Migration (ORLM). This explains both.
Can I do OCE or ORLM on my Windows 7 software RAID to add disks and/or ...
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296 views
Install Linux mint with Raid
My MB supports fake raid (Intel DH67CL motherboard). But I was using the system in 'software raid' as I could not correctly set up fake raid in Debian. Now, I decide to use Linux Mint 12. During the ...
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1answer
77 views
How do I create a complete disk mirror in Windows Server 2008?
I'm trying to mirror a full Disk in Windows Server 2008, however I don't see any options to mirror a full Disk, only Volumes.
Both disks are the same brand, size and are configured as Dynamic Disks, ...
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27 views
Windows 7 Raid - Drives can't see each other
I'm trying to stripe two drives using the disk management tool. Both partitions give me the option to stripe them but when I use the wizard the other drive doesn't show up to allow me to raid to it!
...
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Need to replace OS drive on ubuntu system, how do i keep soft-raid partition?
So right now I have a HTPC with 5 drives in it. One drive is an OS drive (mounted on /) that is starting to fail, SMART is telling me continually that I have bad sectors. The other drives are 4 ...
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86 views
Update grub for whole disks added to software raid
I have a raid-1 running under rhel6 (/dev/md0) that is mapped to /. It contains two unpartitioned disks (/dev/sda and /dev/sdb). I'd like to be able to boot from either disk. But grub won't let me ...
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3answers
122 views
RAID-1 in RHEL 6; can't get partitioning on identical devices to look identical
I have a RHEL 6 fileserver. It contains two identical 2TB SATA drives. Both are supposed to contain one partition that takes up all the space on the drive (and this used to be the case). When I had ...
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3answers
85 views
Several questions about software and onboard RAID 5
I have a few questions on how software and onboard RAID 5 compare:
Is there any way to add a disk to an existing RAID 5 array using either software or onboard RAID?
All motherboards I'm interested ...
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65 views
Reformat soft RAID-5 Ubuntu
I built a linux (Ubuntu) box a year ago and decided to have some fun and use a soft RAID 5. I followed the instructions here.
Things seemed to work fine, but now it's time to reformat the computer ...
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1answer
126 views
Sharing an Intel RST between Windows and Linux
I have an Intel z68 motherboard, which makes use of Intel Rapid Storage Technology (RST) -- Version 10.5. If possible, I'd like to split my RAID 1+0 RST drive equally between a Linux and Windows ...
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95 views
CentOS - mdadm raid1 drive won't mount to default location
I'm running CentOS 5.5, the system, boot, swap, etc. is all on /dev/sda and I have two identical single-partition drives /dev/sdb1 /dev/sdc1 that are configured in RAID1 (using mdadm). It was working ...
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163 views
Raid 0 failing on a mac mini server
I'm trying to set up a software striped raid configuration on a mac mini 2011 running lion server. The procedure seemed to be pretty straight forward, but the result was far from the expected. Here's ...
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34 views
Hardware RAID 5 and software raid
I want to know if I have hardware raid 5 with 4 disks. Do I need to have software raid/ mirror partitions?
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331 views
How-to change the name of an MD device (mdadm)
Here is the output from mdadm -Esv:
ARRAY /dev/md127 level=raid0 num-devices=2 UUID=d89d9d45:9a420812:c44c77eb:7ee19756
devices=/dev/sdb8,/dev/sda8
This is a v0.90 array. The question is as ...
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45 views
How to remove swap partitions from RAID 1 Array on Ubuntu?
Can anyone point in the right direction on how to remove SWAP out of a RAID1 configuration on Ubuntu 10.04 server? According to the Ubuntu Advanced installation guide, here, it said to add swap to the ...
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146 views
Why do motherboard manufacturers continue to include fake RAID? [closed]
Windows 7 is becoming ubiquitous and offers a simple software RAID solution within the OS. Modern desktop Linux distros have good software RAID capability as well.
But mid to high end motherboards ...
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1answer
54 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 ...
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1answer
56 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 ...
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1answer
312 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 ...
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2answers
79 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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79 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 ...
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Ubuntu mdadm RAID 10 performance on Atom D525 [closed]
I am thinking about moving my 2 x 2TB drive software (mdadm) RAID 1 to a RAID 10 setup. I have been reading online and it looks like RAID 10 has good performance and redundancy.
I currently have the ...
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1answer
1k 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 ...
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1answer
79 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 ...
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2answers
458 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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543 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 ...
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313 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 ...
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131 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
264 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, ...
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805 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 ...
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85 views
flexraid - how does it handle very large files?
What happens when using FlexRaid (or possibly other similar solutions) and large files that exceed the size of a particular drive?
For example, if my FlexRaid NAS or volume is 2 TB, made up from 4 ...
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1answer
211 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 ...
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1answer
105 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 ...
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1answer
39 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 ...
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3answers
906 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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1answer
121 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 ...
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1answer
81 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 ...
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183 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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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 ...
