Tagged Questions

Questions which refer to software RAID implementations.

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1
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1answer
32 views

Move two X-RAIDed disks to ubuntu

I have an old NAS (Netgear ReadyNAS Duo) that are X-RAID (Expandable RAID) that I need to move on to a new Ubuntu 12.04 Server. Assuming that this is software raided, does anyone know where I can ...
0
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1answer
760 views

Understanding /proc/mdstat [U_] VS [_U]

My server is set up with raid1. A few nights ago sda fell out completely and data was corrupted. I replaced the drive, cloned the partition table and added the respective arrays. While adding sda3 ...
1
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0answers
30 views

Is there a safe way to move a partition beneath a linux software RAID5 using mdadm?

Suppose, for example, that you have a RAID5 across multiple disks and you would like to retire the oldest of the disks and replace it with something from this decade. I know I can fail the partition ...
0
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1answer
56 views

LVM while mdadm is creating a RAID6

So earlier today I was setting up a new server and creating a RAID6 array with mdadm. I then decided to create a physical and logical volume with LVM while it was running and throw on ext4. So before ...
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0answers
45 views

Is it possible to restore lost files from a repartitioned raid 5 array?

I decided to reinstall my server from Windows Server 2008 R2 to Ubuntu Server 13.10. Of course, i took a backup of the (531GB) files on my software raid 5 array (4x3TB, no hotswap), however, some ...
0
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1answer
48 views

Is it possible to create software Raid array with operating system partition included?

I know that software raid array can be created in the OS it self. But my question is, Is it possible to create a software raid array including partition which is having Operating System installed ? Or ...
0
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1answer
114 views

Recover software RAID

I built a RAID-1 with two hard drives using mdadm. Command used was: mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sdb /dev/sdc it went fine, I create partition table and partitions in ...
0
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1answer
121 views

Linux software RAID 10 on mixed drives - alignment

I have 4 2.5" 7.2k drives lying about and I'd like to build some RAID arrays for a bit of VM storage on my KVM lab box. There are 2x 320GB drives and 2x 500GB drives. I'm looking to create a RAID 10 ...
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0answers
44 views

Can OpenFiler do software RAID and then expose that as an iSCSI target?

I want to build a SAN for personal use for the house server. I came across OpenFiler. I don't want to rely on hardware RAID since the cards can be costly and if the card dies I will have trouble ...
0
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0answers
148 views

Use of mdraid in XenServer 6.2 limited by dom0?

I've been playing with XenServer 6.2 in a lab environment and have set up a glorified desktop with a few 7.2K disks in it. Not worried about official support, it's just for fun. I have enabled ...
2
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1answer
186 views

Is Btrfs vulnerable to RAID write hole effect?

If not, does it mean that Btrfs in RAID mode is fully resistant to power failure?
0
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1answer
100 views

How can I change super-minor number of a software raid array meta 1.2?

I had a double failure while I was away on the holidays of my array. As I was saving the data, I created a new array on a new drive has /dev/md1 and copied the info from my almost failed remaing HD ...
0
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1answer
29 views

Is it possible to operate two RAID-0s alternately?

I have a software RAID-0 (two hdds) on a WIN7 machine that holds all footage of a video project. If I remove and store these drives and install two new drives as RAID-0 for another project, will I be ...
1
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1answer
495 views

How to create a software RAID-1 array on Windows 7 not spanning whole disks

I have a brand new PC dual booting out of a single SSD drive (win7+debian). I added a couple of 2T hd I want to use from both Win & Linux. My target is to have two separate RAID-1 arrays on four ...
0
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1answer
862 views

Windows Dynamic Disks vs BIOS FakeRAID

I have two 3TB disks in a Windows 7 Dynamic Disk Mirror array (effectively, software RAID1). Apart from being tied to the O/S (I can't mount the array in Linux, for example) - is there any difference ...
0
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1answer
193 views

Repair partition table for disks in a RAID1 array

Here's my problem. I have several arrays. RAID1. I've scanned each drive that's part of an array with gdisk and it reports problems. One array (2 drives) has a damaged GPT partition table and a ...
0
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0answers
19 views

MSA 20 SATA for home use

I am looking at getting an MSA 20 off eBay for my home, I am curious about the software, is it a free download from HP or is it included in the controller? The one I am looking at has 1 controller ...
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0answers
64 views

Recover Truecrypt-encrypted software-RAID5 (maybe overwritten superblock)

I updated some parts of my fileserver and installed the latest Debian version. It detected the mdadm raid, but marked the array as 3 active devices and 1 spare device. I thought this was wrong and I ...
0
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0answers
68 views

linux mdadm: recover overridden array

I had 2 3TB disks in a RAID1 array as /dev/md2. I tried to recover that array, by recreating it (which was probably stupid). I issued mdadm --create /dev/md2 --assume-clean --raid-devices=2 ...
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0answers
1k views

SDcard /dev/sdb2 is apparently in use by the system; will not make a filesystem here

I divided my sdcard into 2 partitions, but It got an error and couldn't create a new partition. Error: /dev/sdb2 is apparently in use by the system; will not make a filesystem here! My ...
0
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1answer
35 views

Linux software raid [duplicate]

I want to know if I used software raid on Linux for a non system disks (raid 5 as example),then I lost the system for any reason ! can I restore the data on the raid after a fresh installation ??
0
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2answers
118 views

Use the speed of an SSD + two HDD in RAID 1

Is it possible to gain a speed benefit of an SSD if you create a software raid with a big SSD + two smal HDDs? At the moment I have a system with only two 320GB HDD. And I thought about inserting a ...
0
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0answers
225 views

Power loss during mdadm RAID level change

As per the title, my mdadm RAID was in the process of migrating from level 6 to 5 when the power cut out momentarily. Unfortunately I am no longer able to reassemble the array - the assemble command ...
1
vote
1answer
171 views

Trying to Narrow Down a Disk Error

I've been experiencing some weird errors from some hard drives, and I'm having trouble narrowing down the problem. It's part of a RAID array (Linux software RAID, budget hardware), so when it dropped ...
0
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1answer
144 views

Adding sda1 vs. sda to a linux software raid

I'm running a Linux md software RAID 6 on several USB hard-drives. Each drive is partitioned to contain one partition of type fd (linux raid). My RAID is built on these partitions, i.e. it uses sda1, ...
1
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1answer
322 views

RAID 5 degraded performance

I'm currently rebuilding my fileserver, but because of SATA port limitations, I can only use 5 disks at a time. I've remove a drive from my original RAID, so I've been able to create a new degraded ...
1
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1answer
565 views

Assembling an mdadm array with “possibly out of date” disks

I've recently moved house and have had some power problems after switching on my file server that's using a mdadm RAID5 set up. The file system I'm using is ext4. It seems that at some point two (of ...
0
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3answers
650 views

Can a secondary SATA drive under Win 7 Pro software RAID 1 mirror be boot-able with no hassle?

Using Windows 7 Professional software RAID 1 (Mirror) of two identical SATA drives is it possible in the event the primary drive fails that the system may boot off the secondary drive without doing ...
11
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2answers
663 views

Why am I seeing such low SMB transfer throughput?

Ok, there's a bit more to the story than the title implies. Background and Environment: I'm copying several TB from an older Ubuntu server to a newer Windows 2012 server over SMB. (Technically, it's ...
1
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0answers
402 views

md0 RAID1 can't read superblock

i have a problem with my md0 array, which is an raid1 (2 mirrored USB-Sticks) Mount gives "Can't read superblock" cat /proc/mdstat: Personalities : unused devices: <none> fdisk -l ...
1
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1answer
1k views

Reducing Linux Software RAID Rebuild Speed?

This may sound silly, but is there a way to intentionally reduce the speed of a rebuild in a Linux Software RAID? (Basically reducing the throughput of all of the disks so that it's not maxing out.) ...
1
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2answers
223 views

RAID on partitions or devices

I plan to create a software-only Linux MD RAID10 array from two identical 1TB discs (using mdadm). Should I create it directly on the two disc devices (/dev/sda and /dev/sdb) or create a partition in ...
1
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0answers
42 views

erased md0, md1 and can't recreate them

I previously had a working RAID 1 array. I think as a result of running grub-install /dev/sdb and grub-install /dev/sdc I somehow wiped my computer of md0 and md1. I need to set them up again. When ...
4
votes
2answers
348 views

Unable to create software RAID volume in unallocated space on primary disk

I have two disks that I'd like to partially combine into a striped volume (RAID0). Disk 1 contains the primary partition that boots into Windows 7 Professional, disk 2 is currently not used. On disk ...
1
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1answer
180 views

Windows Software RAID: How can I view the Windows RAID parameters (disk signatures, etc.)?

The software RAID array in my Windows 7 x64 box failed. Drive tests report the drive itself as healthy. Two drives, RAID1 partition and one RAID0 partition. In Disk Manager, the failed drive shows up ...
3
votes
1answer
709 views

mdmda raid 1 - spare drive after SATA cable change

Yesterday my hoster changed a SATA cable of one of my hdds, when my server came back up again cat /proc/mdstat showed this Personalities : [raid1] md124 : active raid1 sda1[0] 4193268 blocks ...
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0answers
125 views

Is `dmsetup remove` safe with respect to contained data?

I have a "lost" SW RAID array as described in this question: http://askubuntu.com/questions/311024/raid1-array-lost-after-upgrade-from-ubuntu-11-10-to-13-04. I have now identified a way to mount one ...
1
vote
1answer
269 views

Documentation for mdadm bad block support

I've read a bit about that mdadm (and the kernel) now have bad block support but I am having a hard time finding any useful documentation on this subject. Is the bad block list for disk X duplicated ...
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0answers
204 views

Upon reboot, Linux software raid fails to include one device of a RAID1 array

One of my four Linux software raid arrays drops one of its two devices when I reboot my system. The other three arrays work fine. I am running RAID1 on kernel version 2.6.32-5-amd64 (Debian Squeeze). ...
2
votes
2answers
738 views

Convert RAID 1 to RAID 10 in mdadm

In my current Ubuntu server, I have 2x 2TB Western Digital RED hard drives in a RAID 1, using mdadm. I would like to add 2 more 2TB RED drives, and convert it to a RAID 10. I realize I would have to ...
1
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0answers
107 views

Difference in Storages Spaces feature between Windows 2012 Server & Windows 8

So here it goes, I have a test bed setup, a machine with three harddrives besides the OS drive and installed on this machine is Windows 2012 Server Standard. I have the following Storage Spaces ...
0
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2answers
72 views

Writing to a specific drive with software RAID4 on Linux

Edited to reflect conclusions from comments: I want to construct a software RAID-like array with 2 storage devices plus one parity device, where the parity device maintains the XOR of the two other ...
1
vote
1answer
307 views

Restart degraded RAID array after crash

I've had to (temporary) reduce my RAID5-Array, so that there are four out of five disks available. Things getting worse as my system crashed during write process. After reboot the system wants to ...
0
votes
1answer
78 views

Need to run a program if a hard drive fails using Mega-raid software

I am hoping to run a program when a hard drive fails. I am using Mega-raid software on a windows server 2008. I was thinking of using windows event viewer, to run a program when an event comes in on ...
0
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1answer
86 views

How can I delete soft/motherboard RAID 1 from a different computer?

I have a drive. It was part of a RAID 1 mirror on a motherboard-based raid controller (nVidia controller on an ASUS A8N-SLI Deluxe), which, if I understand correctly, is considered to be "soft" raid, ...
4
votes
3answers
17k views

How do I reactivate my MDADM RAID5 array?

I've just moved house which involved dismantling my server and re-connecting it. Since doing so, one of my MDADM RAID5 arrays is appearing as inactive: root@mserver:/tmp# cat /proc/mdstat ...
1
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1answer
124 views

Resume mdadm array build after power outage?

I was building a 2tb x 4 disks using mdadm. Originally mdstat said it was going to finish in 48 hours but unfortunately at 47 hours a power outage came into play :-) So I decided to zero out the ...
2
votes
1answer
2k views

Windows Server Software RAID 6

I want to set up a software RAID 6 configuration, but in Windows Server 2008 it only lets me do up to RAID 5. In Server 2012 I saw they have this new thing called "Storage Spaces" which sounds neat, ...
0
votes
1answer
444 views

SATA Raid-0 Mixing SATA-II + SATA-III: Change jumper?

I have 2 SATA hard disks They are 2 TB each. Both are WDC Greens Respective models of *EARS *EARX EARX is SATA-III While the other is not. While the raid does function as is, would there be any - ...
1
vote
1answer
2k views

How do I safely move a Windows 7 software RAID 1 volume to a new PC?

I have 2 identical drives in an old PC running as a mirror RAID (RAID1) using the Windows 7 software RAID. These drives are data-only drives and are not being used to boot an operating system. How do ...