RAID solution handled by the operating system.

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19 views

Recover data from OpenBSD softraid down to a single disk

I'm currently very desperate: I have a 3TB WD Red disk that I need to extract data from. This was part of a softraid on an OpenBSD 5.6 machine. I was in the process of migrating to a zfs on linux ...
0
votes
1answer
30 views

How to fsck a partition that is part of a software Raid that again is part of a LVM volume group?

The faulty partition is /dev/sdb3. from /proc/mdstat: md2 : active raid1 sda3[2] 2896184639 blocks super 1.2 [2/1] [U_] says /etc/fstab: # /dev/md/2 belongs to LVM volume group 'vg0' ...
0
votes
1answer
150 views

XenServer 6.5 Software Raid

I try to install XenServer 6.5 with Software-RAID 1 at my home lab. With XenServer 6.2 this setup ran stable for a few months (at the same hardware). XenServer 6.5 installation went smoothly and ...
0
votes
1answer
33 views

Disk I/O at limit with software raid

whenever I use rm or cp on a bigger file structure the disk i/o is going up to the top, but not with the focus on cp or rm, it is the software raid sync. My knowledge in this area is limited. The ...
0
votes
1answer
33 views

Repairing RAID6 with two drive issues mdadm

I have had two disk failures on my RAID6 array. I have added two new disks and did the following: I ran mdadm /dev/md1 --remove on the two disks I set up my RAID on the 1st partition of each disk ...
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0answers
31 views

Slackware 14.1 software raid kernel panic unable to mount root fs [migrated]

Trying to install slackware onto a raid 1 on 2 2TB drives. I followed the official readme. I have two drives, sda and sdb. They each have two partitions, one for /(50GB) and one for /home(Rest of ...
3
votes
1answer
76 views

Best way to RAID 4 x Intel SSD 910 for PostgreSQL

I have a Linux (debian/ubuntu) server with 4 x Intel SSD 910 800GB pcie that I need to RAID together. The biggest problem with these card is that they give you 4x200GB drives that you cant ...
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0answers
28 views

Migrating linux (madm) RAID1 (mirror) to something else?

I have 2x 3TB in a mirrored RAID 1 volume. I would like to extend this to a 4x drive volume. I'd like to have 1 disk for redundancy. I'm no IO/RAID expert, or madm come to that, but know enough to ...
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1answer
50 views

How to migrate RAID-6 from 5 disks to 4 disks while increasing disk sizes

I am having a quite complex problem and while I found solutions to individual steps (and already applied some of them in different contexts), I am not quite sure on how to do the whole procedure ...
1
vote
1answer
17 views

Is it possible to update stripe-width on an existing, and used, ext4 fs?

I have a RAID 5 with 5 3TB drives (8 in few weeks), on a Debian. There is only one ext4 partition on it, using all the space available. Actually, due to origins of the RAID (4 drives), the ext4 fs ...
1
vote
1answer
43 views

Linux soft RAID6 how to identify last failing drive [duplicate]

I have a RAID6 array that had been neglected, and just had the third drive fail. I want to do a ddrescue of the last drive to fail to try to recover the RAID, however I don't know how to identify ...
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votes
1answer
22 views

Raid-5 Linux Software array, 3 drives “removed”

I have a raid array with several drives marked as removed. I want to add them back in, but am not sure how to do so. [root@tera2 ~]# mdadm --detail /dev/md3 /dev/md3: Version : 1.2 ...
3
votes
1answer
57 views

One disk of a software RAID10 was repartitioned. What to do?

I have a software array in one machine root@c ~# mdadm --query --detail /dev/md0 /dev/md0: Version : 0.90 Creation Time : Mon Mar 17 10:22:38 2014 Raid Level : raid10 Array Size : ...
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votes
2answers
59 views

SW ZFS vs. HW RAID controller

I run a FreeBSD 10.1-RELEASE webserver, and I have 2 sata HDD on a HW RAID1 controller, but when I installed the OS, it won't do it on a ZFS filesystem (for mirroring as I intended to) but I was ...
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0answers
24 views

Not sure how to change primary partition size and add a new partition on a software RAID1 using mdadm, as well as parted or fdisk?

I'm trying to create a /data partition to run drbd. However the drbd guide only shows steps for an fdisk on a normal disk, and not mdadm software raid. So I have sda3/sdb3, which are holding ...
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1answer
57 views

LSI MegaRAID 9240-4i & RAID1 (mirroring) on ZFS filesystem

Exist any incompatibility between an existing virtual drive created on LSI MegaRAID 9240-4i SAS/SATA Controller with RAID1 and the ZFS filesystem? I tried to make mirror(2xSATA HDD 300Gb) on freebsd ...
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2answers
73 views

3disk in raid 1 using half/half

Im using a mdadm software raid system on my new server which runs 3x120GB ssd drives. Currently, this is the preinstalled configuration that came with the server cat /proc/mdstat Personalities : ...
0
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1answer
51 views

Ubuntu Software RAID 1 with NTFS weird volumes on RAID Array

I'm trying to mirror two secondary 2TB HDDs with RAID 1 with 1 big NTFS partition and am coming cross something that looks weird to me, although it could just be my complete ignorance because this is ...
1
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1answer
166 views

Recovering a RAID5 with 2 disks out of the array

I don't want to approach this in a trial-and-error manner as I know this is the best thing to do if I want to loose my data. I have a server with 4*2TB disks in RAID5 (yes I know it's not wise) on a ...
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2answers
26 views

How do I list which drives are part of each RAID array?

I have a linux software RAID using md. I want to list all of my RAID arrays and each hard drive attached to them. Is there an easy way to do that?
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0answers
27 views

Software RAID0 on ephemeral storage for Server 2008 on boot

I have a c3.large instance which I would like to run the two ephemeral drives in a striped raid configuration. I am able to do this via command line and the disk management msc, but I have not been ...
3
votes
2answers
175 views

Software RAID 10 not any faster than s/w RAID 5 on Ubuntu 14.04 box, why?

We are doing some tests on a new database server with 4 x 240 GB SSD disks. From what I have read RAID 10 should be faster than RAID 5 with the same "one-disk loss ok" redundancy. However when ...
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0answers
26 views

Improve read performance on ext4 on Centos with software raid1? [duplicate]

I'm running a number of MongoDB nodes on dedicated servers running Centos6. Each machine has two SSDs which I have in Raid1 with two logical partitions: # df -h Filesystem Size Used Avail Use% ...
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53 views

Windows Server 2008 R2 - Problems after degraded software-raid

After a harddisk-crash the server will start from "secondary-plex" - but becomes unusable: -> Boot -> Login as Administrator -> Desktop is ready -> Try something to open: nothing will work and the ...
3
votes
1answer
49 views

When does a Raid restore redundancy after a broken sector is flagged as defective?

What happens when I flag a sector on a hdd in a RAID setup as `defective (GLIST) ? Will the data be written to the replacement sector right away or does this depend on the actual setup/settings ...
2
votes
2answers
167 views

Is there a way to force a TRIM in a Windows 2012 Software RAID array?

I have a Windows 2012 server configured with two SSD under a Software RAID 1 (controlled by Windows), under that configuration the optimization tool is not supported. Is the TRIM still ...
1
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1answer
747 views

How can I coax RHEL / CentOS / SL 7 into booting normally with degraded software RAID 1

I set up a new server (my first with this version of Linux). I installed a pair of 160 GB blank SATA HDDs (one Seagate and one WDC, but with exactly the same number of LBA sectors) in an old machine, ...
0
votes
1answer
67 views

Reconfigure (software-RAID) array for more space

I have: Windows Server 2012 with Hyper-V and 2 VMs x6 hard drives 500 GB capacity in software-RAID array (Window's Storage Spaces) for VM storage, x1 SSD boot drive for server host OS (and VM page ...
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1answer
53 views

Filesystem (or another use) for totally unreliable, old hard disks on a Linux system [closed]

I've got a couple of disks lying around which are small in capacity and old enough to be considered spinning spinning rust, my gut instinct is to not trust them, but the damn things still work. ...
2
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0answers
19 views

Disk Management showing all disks failed and extra spots after replacing a disk

Hello I work for a small company and one of our departments backs up all of their data onto a HP NAS with 4 x 3TB HDDS in a software RAID5 configuration running windows 7 64bit. We recently had one of ...
0
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1answer
138 views

Debian server not booting after software RAID-1 array degraded

So I have a Debian 7 server with 3 hard drives. Its RAID-1 is basically configured this way: md0: sda1, sdb1 --> / (root) md1: sda5, sdc1 + sdb5 (spare) --> /data (sdc1 is on a SSD, and sda5 is ...
0
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0answers
37 views

Rebuilding raid1 array fails device busy

I had a hard disk fail on my server, so I got the provider to replace the hard disk. Unfortunately I forgot to do mdadm /dev/mdX --fail /dev/sdaY for the disks. Now after a reboot, I get this: ...
2
votes
1answer
112 views

mdadm RAID6 to RAID60

Is it easy to convert a RAID6 to a RAID60? Right now, I have an 8-drive RAID6. I'm looking to upgrade to a 3U 16-bay system and thinking of having a 16-drive RAID60. Is it possible to move my ...
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4answers
448 views

Raid 1 across 3 partitions, what does it mean?

I see a server with this kind of configuration. What does it mean? # cat /proc/mdstat Personalities : [raid1] md0 : active raid1 sda1[0] sdc1[2] sdb1[1] 48827264 blocks super 1.0 [3/3] [UUU] ...
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0answers
127 views

Can Windows Storage Spaces Mirror use 5 HDD in JBOD?

I have a 5 disk USB 3.0 enclosure (JBOD configuration, Windows see's 5 physical disks) with a max of 4TB per disk. I want to make a Windows Storage Spaces in mirrored mode (all data written to 2 ...
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0answers
766 views

Setting up a bootable multi-device (RAID 1) using Linux Software RAID

I'm trying to setup a bootable software RAID that will contain the root filesystem and boot up Linux Mint Qiana. It will be used to run a few graphical monitoring applications in a small datacenter, ...
1
vote
1answer
78 views

Disabling damaged RAID 1 to read from healthy HDD

One of the HDDs in my software RAID 1 on a dedicated server is damaged. The customer support is slow to respond. I would like to transfer all data I need to another server, but file access is ...
0
votes
1answer
152 views

Windows 2008 R2 server software RAID-5

After one of the reboots (normal one after windows update) Windows 2008 R2 marks software RAID-5 disks (OS-Based) as "Invalid". RAID structure is intact - I can see it via R-STUDIO. All data are OK ...
1
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1answer
57 views

LVM RAID10 “Won't be synchronised” - What does it mean?

I was creating an LVM RAID 10 across 4 physical volumes (each 3TB) when I got the following error message: WARNING: New raid10 won't be synchronised. Don't read what you didn't write! My googling ...
0
votes
1answer
37 views

MDADM remove drive during recovery

I would like to know that can I remove a drive during a recovery process from a RAID1 array: What happend is that SDD had bad sectors, I removed it with mdadm --manage /dev/md0 --fail /dev/sdd1 ...
0
votes
1answer
3k views

Configuring RAID1 on HP Proliant Microserver N54L / Ubuntu 14.04.1 LTS [duplicate]

I've bought a N54L and fitted two 3GB drives. Keen to get set up with RAID1. BIOS: SATA controller mode set to "RAID" RAID Option ROM utility: both physical drives set up as one logical drive When ...
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2answers
107 views

Should I partition a RAID or just create a file system on it? [duplicate]

Given a RAID 6 created from 6 drives /dev/md0 which should be used fully for data (no booting from it, root and swap are on a different drive), should I create one partition on that device and then ...
2
votes
1answer
4k views

Unable to mount '/dev/sda'

My server has two 2 TB hard disk drives in soft RAID 1. I can't mount /dev/sda. Output of parted -l root@rescue:~# parted -l Model: ATA HGST HUS724020AL (scsi) Disk /dev/sda: 2000GB Sector size ...
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1answer
90 views

RAID 10 and LVM

I have just setup a new SolusVM Xen Node at my DC. I asked them to install CentOS6 with Software RAID 10 and 100GB to root then the remainder to an LVM group for Xen. All in Software RAID 10. The ...
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0answers
451 views

Sizing of journal disks with Microsoft Storage Spaces parity volume

I'm currently speccing out a new backup server. It's going to be running Windows Server 2012 R2 with Direct Attached Storage, and I'm considering using Storage Spaces rather than using a RAID card. ...
2
votes
1answer
57 views

Raid 5 URE rate [duplicate]

I've recently read this post: http://www.standalone-sysadmin.com/blog/2012/08/i-come-not-to-praise-raid-5/ tldr; It basically says that the error rate of a RAID system is tied to the hardware, and ...
2
votes
2answers
173 views

mkfs on raw software raid device or partition

I am making a huge RAID10 device (8 TB) for storage on CentOS. I have created the 4 partitions on my 4 physical hard disks and have created the raid device /dev/md2 out of those 4 partitions. Now ...
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190 views

mdadm: All RAID disks look good, but can't access devices

Now, granted, issues with RAID rarely come up (at least with the one that I have to deal with in my life), so I'm not the most experienced person in the world. However, I'm not seeing any issues with ...
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0answers
133 views

Windows software RAID 1 with EFI bootloader on both disks

I have a Windows Server 2008r2 with two HDDs installed. The main partition, which has Windows installation on it, is mirrored between the two disks. The problem is, this is a UEFI machine, and EFI ...
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0answers
845 views

Ubuntu 14.04 mdadm issues on boot

I have a 14.04 Ubuntu machine which has: 2 x SSD in RAID 1 (md0) 3 x Sata HDD in RAID 5 (md1) The machine is set to boot from the md0 device. This machine has been running fine for a month or so, ...