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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Repairing windows 7 Raid 0
I have a raid 0 4 x1tb and 1x 3tb (a bit silly I know) but the partitions are now showing as RAW after I did a ckhdsk! is thair any raid reconfiguration software out there that will fix this? or is ...
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4answers
61 views
RAID 1 on 2 external HDDs
I have an Ubuntu 12.04 server based on my old laptop. It's HDD (160 GB) is too small for the file storage I need, so I'd like to attach a couple of external HDDs to it (through USB ports). The data ...
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1answer
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ubuntu 120.04 software raid 1
my primary partition is sdb. i add new disk on sda. i formated it like it is shown in fdisk. Now i want to install mdadm.
Do i need to create md0 and md1 becouse i already have:
...
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1answer
804 views
Ubuntu 12.04 - Add RAID 1 Array on existing device?
I read this howto
Ubuntu 10.04 - Add RAID 1 Array?
and
http://ascend4.org/Installing_Raid_1_on_Existing_Ubuntu_Server
but i only have 2 disks.
dev/sdb1 -> where is currently ubuntu 12.04 running
...
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1answer
38 views
Ubuntu - inconsistent performance with software raid-1
I'm installing a new system using soft-raid 1 with two physical disks. While running a few tests (after waiting for the initial sync to complete) I found the harddrive speed was highly inconsistent.
...
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1answer
146 views
8 hard drives, very same model, software RAID0, terrible performance
I have 8 hard drives in my PC, assigned as storage.
Three of them are attached to the mainboard.
Four of them are attached to a controller [ SiL 3114 ]
One of them attached to an another ...
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27 views
Measure software RAID I/O performance in Windows 7 / Server 2008
I have a server, where the HDDs are misbehaving. (The I/O performance is well under normal speeds.)
I would like to diagnose the problem. One app I knew for this, is HD Tune. Sad thing is, it shows ...
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200 views
Tired of FreeNAS - other options? [closed]
I am tired with FreeNAS bugs and putting my data at risk, it has been taking too much to manage something that I want to be able to put more faith in...
Can anyone share some experiences with other ...
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2answers
234 views
Can you add a hard drive to a RAID?
I've decided on creating a NAS running FreeNAS using a software RAID 5 setup. I want to start the RAID with 2x2TB drives and slowly add more 2TB drives as I go. Is this possible? If I have a full RAID ...
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2answers
76 views
Can I use an entire drive for as a software raid member?
Can I use /dev/sda and /dev/sdb for my RADI1 configuration?
Or do I first have to partition both with a single Linux raid partition?
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1answer
191 views
ICH10R based RAID vs Windows 7 software RAID
It seems that performance wise these solutions are about the same and thats not my main concern anyway, but I need to know how do they compare from the point of data getting corrupted?
What are the ...
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1answer
399 views
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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280 views
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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1answer
45 views
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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1answer
551 views
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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169 views
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
169 views
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
82 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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1answer
138 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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3answers
375 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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1answer
226 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
53 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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1answer
97 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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1answer
983 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
181 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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36 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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1answer
30 views
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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1answer
158 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
208 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 ...
3
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3answers
196 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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0answers
98 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
298 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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1answer
229 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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267 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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1answer
44 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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2answers
1k 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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1answer
120 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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1answer
267 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
133 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
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1answer
80 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
586 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 ...
3
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2answers
97 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 ...
1
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2answers
159 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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0answers
463 views
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 ...
1
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1answer
2k 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
117 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
928 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 ...
1
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1answer
834 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
461 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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1answer
192 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, ...
