Questions which refer to software RAID implementations.

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3
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190 views

mdadm: Win7-install created a boot partition on one of my RAID6 drives. How to rebuild?

My problem happened when I attempted to install Windows 7 on it's own SSD. The Linux OS I used which has knowledge of the software RAID system is on a SSD that I disconnected prior to the install. ...
2
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0answers
275 views

Redundancy: LVM+mdadm or LVM internal RAID

The task is to create LVM storage for virtual machine images. So LVM will be used in any case. There are two ways LVM providing redundancy: block mirroring lvcreate -m 1 --mirrorlog mirrored -n ...
2
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0answers
655 views

mdadm RAID monitoring no DegradedArray email

So, I have a couple of MDADM RAID arrays and I want to set up monitoring with email notifications for drive failures through sSMTP but I can't seem to get it working. The system in question is a ...
1
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0answers
13 views

Raid0 recovery - failed mobo

Short story: motherboard died, need to recover data from 2 working HDD's in RAID0 Long story: My mobo died on a Dell Studio XPS 7100, I basically upgraded all the components and my pc is now up and ...
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0answers
41 views

RAID5 active device failed during reconstruction

I have this Linux RAID5 array with 4 2TB harddisks, with 3 active device and one spare, giving me a total disk size of around 6TB. Recently one drive (sdd) is starting to give me some SMART errors, ...
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46 views

Growing an encrypted RAID5 array without causing alignment issues

Question Is there anyway to tell mdadm to make sure a certain logical sector on the RAID-device stays aligned to the beginning of a stripe when growing a RAID5 array? Problem My RAID5 is encrypted ...
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168 views

Linux MD software raid stripe cache size

From what I can piece together the /sys/block/md0/md/stripe_cache_size is for raid5 and 6 set at a very low default value to avoid starving machines for memory. By increasing this value you can get a ...
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127 views

windows server 2012 span multiple raid 5 arrays

I have some old hard disks that I want to get as much out of them as possible for space. Currently, I have: 2 x 200 GB HDD 2 x 500 GB HDD 2 x 1.0 TB HDD 1 x 1.5 TB HDD If I combine them as ...
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222 views

Raid 5 Degraded

I have a dell PowerEdge T110 with a raid 5 array that says it is degraded. This uses a perc s100 controller. I am using 4 74gb raptor drives for the array. The computer tries to boot but it hangs on ...
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32 views

Windows Software RAID recovery after non-RAID drive failure

This is a hypothetical question but first some context. I'm looking at setting up a simple RAID 1 (mirrored) for storing data. I was looking at using Windows Disk Management tools on a Windows 7 ...
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147 views

MDADM RAID 5 disk missing after reboot

I have a server with 6 disks (4x2TB + 2x4TB). I put the 2TB disks in 2 RAID 0 and the resulting 2 4TB RAIDs with the 2 4TB disks in a RAID 5 array. The RAID works fine until I reboot the server. After ...
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37 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 ...
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2k 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 ...
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0answers
569 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 ...
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0answers
45 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 ...
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143 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 ...
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257 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). ...
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124 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 ...
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60 views

Software RAID failed to mount after apt-get upgrade

I have a software RAID 10 (jfs) on an ubuntu 12.10 and require some assistance repairing the RAID after it failed to mount after a routine apt-get upgrade followed by a reboot. /dev/md0: Version : ...
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722 views

Unable to reassemble md raid on drives pulled from ReadyNas Duo v1

I'm toying with a ReadyNAS device that I've recently acquired. It is a SPARC-based box, and it runs linux. As device is pretty slow, I've pulled one drive out of array, hoping to populate it with ...
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335 views

Windows 7 : soft RAID1 and dynamic volumes reliability

My setup is quite classic nowadays : 1 SSD for system/apps and 2 HDDs for data setup in a fake RAID1 array. I also have a backup scheduled every week for the data drive in case it fails because I ...
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0answers
2k views

Linux - Repairing bad blocks on a RAID1 array with GPT

The tl;dr: how would I go about fixing a bad block on 1 disk in a RAID1 array? But please read this whole thing for what I've tried already and possible errors in my methods. I've tried to be as ...
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0answers
1k 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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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 ...
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4 views

Remove a drive from a 2-drive RAID 5 array using version 1.2 metadata?

My situation is nearly identical to "How to remove a drive from a non-standard 2-drive RAID 5 array?", except my 2 TB RAID5 is using mdadm super block version 1.2. According to the best answer, ...
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0answers
23 views

cloning drives to correct RAID 10 failure

I don't type questions like this very often, so I apologize if I could have made it clearer. I have 4 HDD slots in which I had a RAID 10 array setup. It is a motherboard software RAID so clonezilla ...
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0answers
9 views

Is a btrfs RAID1 mountable if the added device isn't available/offline/failed/degraded?

Assume I created a RAID1 with btrfs's functions (btrfs device and btrfs balance subcommands instead of mdadm) like so: btrfs device add /dev/sdxZ /dev/sdxY btrfs balance start -dconvert=raid1 ...
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9 views

data recovery issue with LVM on degraded software raid array

I have a raid-10 array that is degraded to two remaining working drives. The software setup is Centos-Xen, so one dom0 and several domUs. I can see the names of the logical volumes and their names and ...
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0answers
12 views

Win 8.1 Pro: Disk Mirroring questions

So its my first time setting up any kind of redundancy for my media and I have a few questions. My setup is as follows: Shuttle SH87R6 Intel i7-4790k 8GB RAM Win 8.1 OS on Samsung 850 Pro 512GB 2x ...
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0answers
25 views

How do I tell which OSX Raid partition needs fixing (and fix it)?

Investigating why my OSX Software RAID disks weren't all being used I discover my RAID-1 system (4 x 1.5TB in two mirrored 3TB slices) is running in degraded mode: airhead:kitematic sholden$ sudo ...
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25 views

Cannot get RAID working with Mac Mini after adding drive

I had a working RAID array with 3 2TB drive in an external Startech.com SATA enclosure that was set to RAID5 I wanted to add another 2TB drive, so I added the drive but according to the manual, I ...
0
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0answers
64 views

mdadm grow from RAID1 to RAID10

I've seen this post about how to convert from RAID1 to RAID10, but reading the mdadm manpage seems to me recent mdadm allows for reshape from RAID1 to RAID10 by going through a reshape from RAID1 to ...
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39 views

RAID setup - possible to disconnect a drive?

this may be a silly question for some, but I rather ask then to be sorry after losing my data :-] I am just playing with RAID config on my Intel X58 ICH10R chipset mobo with Windows 8.1 and I found ...
0
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0answers
25 views

raid5 after changing disk, data disappeared in lost+found or?

I lost a drive so I stopped my array, changed the drive, reassembled the array. So far so good except that when I tried to mount the array I had an error about md0 file system (sorry I rebooted so ...
0
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0answers
27 views

Windows not loading after 1 RAID-5 disk failed

I left my PC turned off for just over a week while I was away. When I turned it back on it said my RAID-5 status was degraded and Windows did not want to load. I replaced the faulty disk and set it ...
0
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0answers
28 views

Updated CentOS kernel to 2.6.32, system won't boot because mdadm array can't be checked/isn't mounted

Just updated a FreePBX system, kernel is now at 2.6.32. Have two RAID 0 arrays that mdadm arranges in RAID 1. Worked fine up until this update, now I get fsck.ext4: No such file or directory while ...
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16 views

With a the built-in Windows software-RAID1 mirror, what procedure does Windows follow on an unreadable sector?

For modern retail hard drives, the Unrecoverable Read Error (URE) is around 1x10E14 bits. This translates into one bad sector for every 12 terabytes of data read. For enterprise class hard drives, its ...
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0answers
58 views

Raid Configuration lost After For Installing Windows/Formatting Hard Drive on reboot

My boss recently got a tower fujitsu server, I dont know the model because it is written in Chinese. I installed windows server 2012, activated hyper-v and even installed ubuntu as a VM and ...
0
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0answers
71 views

BTRFS multiple devices mix raid1 and raid0

Hi Consider the following use case: I have two disks same size (let's say 3TB each). Then create a btrfs filesystem using both devices. Now I want to have two subvolumes "idata" and "ndata". Where ...
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26 views

Moving software RAID to Linux

I'm using a RAID 1 (mirrored pair) configuration in my Media Center/ NAS system. Currently it's running Windows 8 (yeah, big mistake I know) and I'm regretting it (did it for the games, not worth it). ...
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0answers
183 views

Ubuntu 14.04 RAID10

I got Ubuntu 14.04 (recently upgraded from version 12.04). Under this system I got a software RAID10 build with 4 drives (WDC WD20EFRX-68EUZNO) near=2 layout. After the upgrade to newest Ubuntu LTS ...
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106 views

Virtual Disk Service Error: The plex type is invalid

I have windows 7 ultimate x86 on an older Dell Precision 530. I had 3 80gb drives laying around. So I have them in diskpart in windows 7 setup via Shift+F10 and I see 3 74gb drives. I cleaned all of ...
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0answers
34 views

mdadm on Debian 7 forgetting about a disk

I have a degraded RAID1 array running on Debian 7. I am trying to add another disk to the degraded array, but mdadm forgets the existence of the other disk at reboot. The array devices are /dev/sda1 ...
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0answers
21 views

debian boot procedure stops while starting RAID5 array

imagine the following situation: debian wheezy 7.4 on arm system created a RAID5 with 3 disks /dev/md0 created ext4 file system wrote entry to mdadm.conf via "mdadm --detail --scan >> ...
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127 views

Linux RAID Re-Shape Stopped, unmountable

I added another drive to my RAID 5 and migrated it to a RAID 6. Everything went fine, but now the process seems to be stuck at 63.2% and md2_raid6 takes 99.9 of the CPU. RAID Details: /dev/md/2: ...
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0answers
38 views

Build one logical drive from hdd and ssd drives (with a tweak!)

How is it possible to build one logical drive in linux from two physical drives, hdd + sdd with the below rules: All writes are replicated to both drives (Kind of RAID 1). All reads are only ...
0
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0answers
123 views

mdadm raid 6 stuck on rebuilding

I have a raid 6 running consisting of 9 1TB drives. Some time in the last couple of days, one of them became faulty and the raid startet rebuilding. But apparently it is stuck ... This is the raid: ...
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82 views

How to set boot disk after disabling mdadm raid 1?

I had two disks in raid 1. The device contained the whole system. Disabled it from a rescue disk with: (there were three partitions) mdadm --stop /dev/md1 mdadm --stop /dev/md2 mdadm --stop /dev/md3 ...
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196 views

Hybrid Raid-1 HDD + SSD — Write Intent Bitmap

I am currently running a laptop with 1 HDD and 1SSD. I currently am using mdadm to put some partitions in a raid 1 configuration with --perfer-write set on the HDD. I have this working correctly ...
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75 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 ...