RAID solution handled by the operating system.

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3
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1answer
3k views

High server load - [jbd2/md1-8] using 99.99% IO

I've been having spike in load over the last week. This usually occurs once or twice a day. I've managed to identify from iotop that [jbd2/md1-8] is using 99.99 % IO. During the high load times there ...
3
votes
1answer
737 views

Configure Windows RAID-5 “drive failed” timeout?

When a hard-drive controller detects an error, and needs to remap a sector, the drive normally becomes unresponsive for the seconds (or possibly minutes) it takes to try to complete the re-mapping. ...
2
votes
1answer
139 views

Windows software RAID 1: how to identify which drive failed?

I have a Windows Server 2008 set as RAID 1. Recentely it changed to "Failed Redudancy". How do I know which disk failed? Should I try to resync the array before replacing the disk? If so, what is ...
2
votes
1answer
1k views

How to get email alert if one of raid 1 disks fails?

I need to know how can I get email alert if one of raid 1 disks fail to work/crashes. I have CentOS 6.4 64bits, software raid. I did some mistake folowing this tutorial, because it was a bottom note ...
2
votes
1answer
3k views

How can I re-assemble (or recover data from) a mdadm RAID5 array?

I'm trying to recover whatever data I can from a RAID5 array of a failed NAS. The disks were physically moved to another server that so they could be imaged, but Knoppix "helpfully" detected and ...
1
vote
1answer
253 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, ...
1
vote
1answer
83 views

How to copy RAID 1 HDDs from one server to another Identical server

I have one IBM X3100M4, type 2582 windows server and having 2 x 500 GB HDDs in RAID Copy. Now brought new server and having blank HDDs. How can I copy RAID HDDs from Old server to new server? I have ...
1
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1answer
131 views

RAID1: Can I do 'write-mostly' in hardware (LSI type cards) so Drive A: 100% READ and WRITE and Drive B: ONLY WRITE?

The Google hammer has failed me, so I turn to this august body for help :-) I'm interested in doing SSD/HDD RAID1 pairs using the principle of 'write-mostly' as available in Linux's software RAID ...
1
vote
1answer
961 views

How to get notified of mdadm RAID problems?

I am running Ubuntu 12.04 LTS. Yesterday I found a message in my mailbox saying that my server was shut down. I proceeded to reboot the system, but it didn't come up after many minutes, and I didn't ...
1
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1answer
110 views

Does Ubuntu 12.04 LTS support booting from RAID 6?

I'm setting up a new Ubuntu server using 12.04.2 LTS. I have five drives that I am setting up in a RAID 6 with LVM. Can I use this for bootup? Or should I make a separate RAID 1 partition for bootup ...
1
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1answer
120 views

Converting software RAID1 to RAID10 for /boot

Array info: /dev/md0 -> /dev/sda1 and /dev/sdb1 /dev/md2 -> /dev/sda2 and /dev/sdb2 Partition info: /boot -> /dev/md0 / -> /dev/md1 I have two drives that are setup as RAID1 using software RAID ...
1
vote
1answer
387 views

Trouble attaching more than 6 EBS volumes to EC2 instance

I'm using chef to create RAID10 arrays. Last friday morning (10/22) I was able to create arrays with 9 EBS volumes on dev/sdz1-9 with no problems I started having trouble attaching more than 6 EBS ...
1
vote
1answer
608 views

Assembling Software RAID in Live CD for data recovery

I need help recovering some data that's on my RAID which is on a LVM on my server running Ubuntu. What happened was I deleted the logical volume that controlled my swap space which was on a partition ...
0
votes
1answer
10 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 ...
2
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0answers
17 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 ...
2
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0answers
2k views

How to recover an mdadm array on Synology NAS with drive in “E” state?

Synology has a customized version the md driver and mdadm toolsets that adds a 'DriveError' flag to the rdev->flags structure in the kernel. Net effect - if you are unfortunate enough to get a array ...
2
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0answers
294 views

Restore LVM if VG is not consistent (XenServer 5.6.1)

i have a VG that uses the PVs /dev/md1 and /dev/md2. Now one hdd failed in /dev/md1: [root@xenserver1 ~]# cat /proc/mdstat Personalities : [raid1] md1 : active raid1 sda3[0] 382320128 blocks ...
2
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0answers
914 views

Server 2012 (R2) - mirroring the boot drive… what is the state?

I struggle to find modern documentation here. So far we have been booting our servers from the main RAID controllers. Worked nice, but not we get the first of a new generation that hs in the back 2 ...
2
votes
0answers
330 views

MD Raid can't be assembled

I was running a Raid5 with 3 disks at on my homeserver. But had some problems with the back-plane for the disks. The disks weren't detected reliable. So I replaced the back plane and the disks are now ...
2
votes
0answers
438 views

How do I create a RAID10 array using EBS on Amazon?

Basing this question on information I got in Why does df shows only half the size of a RAID10 array?, how should I create a RAID10 array using EBS volumes on Amazon, in a way that will not be ...
2
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0answers
423 views

MySQL INSERT … SELECT renders server unresponsive

Solution: Although I haven't found a proper solution yet I'm at least sure that this is purely a disk I/O problem and has nothing to do with MySQL... I have a MySQL server (5.1.54-1ubuntu4-log) ...
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0answers
44 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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0answers
257 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, ...
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0answers
291 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. ...
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0answers
107 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
756 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, ...
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0answers
105 views

Upgrade Raid 1 to Raid 0+1 and bootloader issue

I am trying to convert my current RAID 1 to RAID0+1 and facing issue in installing bootloader - please have a look what i am doing. My current configuration is RAID1(2*10GB): [root@localhost ~]# ...
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0answers
296 views

calculating optimal chunk size for Linux software-RAID

Am I correct that optimal chunk size is average file read/written to disk divided by number of block devices in RAID array storing the data? For example if the average file size is 1024KiB and I have ...
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0answers
167 views

Why was the replacement drive for failed drive in RAID 1 (linux software raid) was added as a spare?

I have a two drive linux software raid 1 for a server. There are two raid devices. (Boot (md0) & OS (md1)) Last week one of the drives failed so i ordered a new one. Today i shutdown the server, ...
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0answers
121 views

Safe filesystem encryption using mdadm and cryptsetup in EC2

I need to safely store some encrypted information in EC2. For this purpose, I'd like to encrypt a filesystem on my EBS drives to ensure that third-parties won't be able to poke around in my data. ...
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0answers
85 views

Fresh debian squeeze software raid install wont boot

I am following these instructions: http://www.iprobot.net/linux-tutorial/how-to-setup-software-raid-in-debian-ubuntu/ (I used debian-live-6.0.6-amd64-gnome-desktop.iso and DD'd that onto a usb key, ...
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0answers
153 views

mdadm drive UUIDs chanaged, can they be changed back?

So I ran into this trouble and I believe I lost all my data..However I found an old mdadm --examine --scan file I made a month ago and an old mdadm.conf....Is it possible to use these two items to fix ...
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0answers
78 views

Single drive LVM to RAID6 LVM

I cloned my entire LVM volume group from a single drive to a RAID5 array with 3 disks. The VG is formed by these logical volumes: root swap home ... and other volumes of some XEN virtual machines. ...
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0answers
288 views

Reusing slot numbers in Linux software RAID arrays

When a hard disk drive in one of my Linux machines failed, I took the opportunity to migrate from RAID5 to a 6-disk software RAID6 array. At the time of the migration I did not have all 6 drives - ...
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0answers
1k views

Best way to change disks with Intel Rapid Storage Technology 10.8.0.1068; only one disk in current array

I have a raid 1 array which is currently missing one disk. I want to change the system over to two completely new disks. I currently have Intel Rapid Storage Technology 10.8.0.1068 installed. What is ...
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0answers
283 views

After upgrade to SLES11 SP1 - LVM on top of software RAID5 not working anymore

On a system where I have been running OpenSuSE11.1 for some time I performed a fresh installation of SLES11 SP1. The system used a software RAID5 system on top of which an LVM was setup with a single ...
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0answers
402 views

Windows Server 2008 - RAID 5 Fails on Reboot

I've got an install of Windows Server 2008 Enterprise. It's running software RAID-5 with five disks. The disks were originally formatted under Windows Server 2003, but came up fine once I installed ...
0
votes
0answers
17 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 ...
0
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0answers
32 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 ...
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0answers
28 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: ...
0
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0answers
66 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 ...
0
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0answers
140 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
29 views

How do I update the boot environment after software mirroring a Server 2012 R2 OS Volume

I have a single physical server running Windows Server 2012 R2 My original config was a single 240Gb SSD for O/S and two larger spindles for Data storage. On installation, Windows placed 'System ...
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0answers
55 views

Did mdadm --create destroy my data?

I think I messed up pretty bad. On my old system, I had 2 identical drive that were assembled with mdadm as a MD RAID 10 with a "far" layout. When building my new system and migrating the two disks, ...
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0answers
134 views

Software RAID: file system becomes read-only, mdadm fails with SEGFAULT

I have software RAID1 on Ubuntu 10.10 (Linux ubuntu 2.6.35-32-generic-pae). It is dedicated server I control via SSH. Yesterday datacenter people changed one HDD which was crushed. I did not run ...
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0answers
81 views

RAID6 Ubuntu rebuild - how to calculate best parameters for fastest rebuild

I am doing a resync on a RAID6 array and I am looking at some 2 days to complete. I looked here for hints on how to speed it up, but I have, instead, managed to slow it down! HW details are: 10x 4TB ...
0
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0answers
60 views

mke2fs.ext3 stripe-width option missing

I'm trying to set up an ext3 filesystem on a RAID 6 array (with 6 disks) on XenServer 6.2 linux. All the help I can find tells me to use the -E stride=xx,stripe-width=xx options. However my version ...
0
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0answers
131 views

mdadm array fails to start at boot, bad superblock on component drive

At boot my mdadm raid5 array fails to start, saying that one of my disks (sdi) has a bad superblock. However, once I log in, I can start the array no problem with mdadm --assemble /dev/md0 ...
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0answers
1k views

KVM LVM-based guest… kernel: Buffer I/O error on device. Failing drive?

Currently setting up a small KVM host to run a few VMs for a small business. The server has 2 drives in software md RAID 1, then I have it set as a PV in an LVM setup. Guests and hosts are all CentOS ...
0
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0answers
81 views

Replace a slowly dying drive in Linux software raid5

I have the same problem as in Can I "atomically" swap a raid5 drive in Linux software raid? i.e. a Linux software raid with 3 RAID5 disks where one disk is showing smart errors but isn't ...