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4
votes
0answers
42 views

RAID-1 / LVM server won't boot after power outage

Strange issue. After an extended power outage (transformer exploded!) which outlasted the UPS, a server running Slackware 13 crashed. This machine has been quietly serving accounting software and ...
0
votes
1answer
43 views

mdadm - not enough to start the array

I am trying to recover data from a MyBookLiveDuo 3TB*2 RAID1 setup, which is not responding to http/ssh access. I pulled one drive out of the enclosure and attached it via SATA to a Linux laptop. I ...
0
votes
0answers
23 views

Converting A Physical Ubuntu Server with boot raid 1 to a Xen domu

So here's the situation: 1 physical server running a very outdated version of ubuntu 14.04 Booting off of a a software raid 1 configured in the installation. This server runs mission critical ...
0
votes
1answer
31 views

Convert non-raid disk with data into RAID 1 disk (hardware controller)

I moved away from software RAID due to all the hassle it brings. After OS reinstall, I am left with only one drive. I ordered a hardware RAID controller today, and when the controller arrives, I'd ...
0
votes
1answer
20 views

How to re-create RAID1 really properly

System: Laptop with Linux Mint 17.3, 1x SSD for system and 2x HDD intended for RAID1 using mdadm Situation: Without knowing how to create RAID1 properly, I created it badly GParted showed a warning ...
1
vote
1answer
55 views

extend an LVM mirror with an extra non-mirrored disk

I have an LVM mirror made of 6 disks of 1Tb. I've made a RAID 1 mirror with 3+3 disks. The logical volume and the partition on it have therefore 3Tb of usable space. Running out of disk space, I'm ...
0
votes
2answers
29 views

HW Raid - Centos 5 - Boot Issues

I am totally lost as to how to fix this or what to do, I am about to just removed the raid all together. (Work stuff though, so Id rather not)\ I have a tower with 4 drives in it. 2 seperate raids ...
1
vote
1answer
29 views

Convert a non-boot single HDD to RAID 1 without deleting it

I bought a second HDD identical size as the one I already have. My goal is to add it to the existing one as a mirror (RAID 1). But I don't have enough space on a system SSD to move data there. So I ...
2
votes
0answers
36 views

Btrfs adding smaller drive to RAID1

I have a RAID1 btrfs filesystem with 2 2Tb drives, and I had a spare 750 Gb hdd lying around, so I thought I would add it to the RAID so I could use some extra storage. Well, I added it to the volume,...
1
vote
1answer
37 views

How to configure RAID 1 from Recovery Mode?

I have a server is composed from two HDD 1500 GB SATA (/dev/sda and /dev/sdb), one of this have failed and server is in recovery mode. I want to fix it, first I made a backup of the important ...
0
votes
1answer
40 views

How to convert SW MD RAID1 arrays to LVM mirrors?

We have SW MD RAID1 on a RHEL5. RAID devices come from multipath currently. # pvs -v --segments Scanning for physical volume names PV VG Fmt Attr PSize ...
2
votes
0answers
55 views

mdadm - Creating RAID1 on LiveUSB does not persist when re-booting

I have three drives sda, sdb, and sdc: $ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 2.7T 0 disk ├─sda1 8:1 0 1M 0 part ├─sda2 8:2 0 500M 0 part ├─sda3 8:...
0
votes
1answer
45 views

How to check RAID 1

I have my very first server computer. It has two disks in BIOS (fake) RAID 1. The BIOS RAID controller says the status is Normal. But I would like to know if there is a way to check from the system-...
2
votes
1answer
33 views

Using a larger drive in a RAID 1 setup

Is it possible to introduce in a RAID 1 setup a larger drive using its free space for further uses? E.g: What we have: sda - 250 GB HD |-- sda1 - /boot |-- sda2 - / sdb - 500 GB HD |-- sdb1 - /...
2
votes
0answers
438 views

mdadm Software RAID1 with GPT on Debian 8.0 amd64 - Does not boot on disk removal [closed]

INTRO: I have spent countless days attaching/detaching MOLEX->SATA power cables, rebooting machines and trying hundreds of edits and commands. I am on the verge of desperation and desperately in need ...
9
votes
3answers
2k views

mdadm: can't remove components in RAID 1

I have my /boot partition in a RAID 1 array using mdadm. This array has degraded a few times in the past, and every time I remove the physical drive, add a new one, bring the array being to normal, ...
1
vote
0answers
204 views

grub2 lvm2 raid1 /boot

Is it possible to boot from a system where /boot is located within an lvm2 raid1 partition. I've tried a variety of configurations, but I have yet to discover how to do it. I am using two 2TB disks. ...
2
votes
1answer
238 views

RAID1 that can be enlarged when adding a new disk: convert to lvm --type raid1? [closed]

For the last ten years, I have been making inexpensive servers for small businesses. Each server has two identical drives mirrored with raid1. Later, SATA became available, then eSATA. In the past,...
1
vote
1answer
5k views

Why does my RAID 1 NAS have to “synchronize”?

I have a new QNAP TS-451 NAS with two new 3TB drives, installed as a RAID 1 pair. As I copy data on to it, it seems to spend the next few hours "synchronizing" the RAID group. (The web console shows a ...
2
votes
0answers
110 views

BTRFS - Raid incomplete after balancing

I have two 3TB drive that are formated as btrfs and mounted on /media/andy/btrfs as one drive. I run btrfs balance start -dconvert=raid1 -mconvert=raid1 /media/andy/btrfs/ which takes forever. It ...
2
votes
0answers
242 views

Degraded RAID1 array boots with one drive, not with the other

UPDATE It seems initramfs fails to properly mount the array. If I stop and reassemble them, they works: mdadm --stop /dev/md124 mdadm --assemble --run /dev/md124 /dev/sda6 Maybe initrd tries to ...
1
vote
1answer
559 views

Can't boot from RAID array - arrays not assembled at boot

On my lubuntu 13.10, I created a degraded RAID array, copied all the contents of the "main" disk and tried to boot from the array. I mostly followed these instructions. At boot the system does not ...
0
votes
1answer
2k views

“Spare” disk in a 2-disk mdadm RAID1 array?

I recently had a RAID1 volume fail. It had three primary partitions in it, all participating in separate, but similarly configured VGs. This configuration comes from the fact that the machine is ...
4
votes
1answer
4k views

How to install Debian Jessie properly onto multiple devices with BTRFS in mode RAID 1?

As a short introduction I'm going to tell you, what kind of setup I have and what I want to achieve. After that I try to explain my problem. Since this is my first question on U&L I have to ...
1
vote
1answer
148 views

Clone installed system by using the hardware RAID 0+1 synchronization

Alright, following setup: 2 identical machines (DELL Power Edge T320) with a hardware raid. one machine is running for a while now, one machine hasn't even been set up at all The running machine ...
0
votes
1answer
79 views

RAID Level 5 versus Level 1

Is it slower to write one block in RAID Level 5 with 5 disks than RAID 1 with two disks (mirroring only)? I think No since with Level 5 you are writing the data and the parity (two writes). With Level ...
3
votes
1answer
315 views

Recover data from raid 1 when both drives are faulty

I had a RAID 1 on my server, and apparently both of hard drives have failed at the same time. Server support did a quick check to confirm that HDDTEST-W1F21M6K ERROR Finished (Selftest, Device: ...
2
votes
2answers
2k views

Rebuild RAID1 from existing disk, and add another

This question is a problem derived from solving another problem that you can see on this thread. To make it short, my dedicated server has a RAID1 array with 2x3TB HDD. A week ago, one of them failed....
1
vote
1answer
279 views

Removing failed disk from raid 1

my server (Debian Wheezy) has a failed disk. I have sda and sdb and according to the support of my hoster, sdb needs a replacement. I send them this information with the mdstat: http://pastebin.com/...
2
votes
1answer
3k views

Mount an existing RAID 1 Logical Volume after OS upgrade

I just upgraded from Ubuntu 10.04 to Mint 16. The installer did not detect my existing RAID 1 array, and I can't access it anymore. My drives are: SDA - First RAID Disk SDB - Second RAID Disk SDC - ...
3
votes
0answers
227 views

LVM RAID 1 for root [closed]

I have LVM RAID 1 (not mdadm RAID 1, but exactly LVM2 RAID 1) for my root partition. I would like to make my system boot without either of the HDDs where the underlying PVs of the root LVM partition ...
1
vote
1answer
3k views

Performance of RAID 1 with 3 Disks under Linux

The standard way to setup a RAID 1 under Linux is to use two disks of the same size. The write performance is almost as good as with a single disk drive. The read performance can be up to twice the ...
6
votes
1answer
525 views

md raid1 ext3 and 4k sectors slow with directory operations

I recently moved from a hardware RAID1 enclosure to using two eSATA drives with md. Everything seems to be working fine, except for the fact that directory traversals/listings sometimes crawl (on the ...
3
votes
2answers
286 views

Are disks interchangeable in a mirrored RAID setup?

It is often written that disks in a mirrored RAID (like RAID 1) are an exact mirror copy one of another. So can I turn the machine off and simply swap the two harddisks cables? And if one of the two ...
3
votes
1answer
903 views

Kernel failure with software RAID-1 due to single drive read errors

I am running Fedora 19 (kernel 3.11.3-201.fc19.x86_64) with a software RAID-1 (mdadm) setup on two identical Seagate 1GB drives: # cat /proc/mdstat Personalities : [raid1] md1 : active raid1 sdb3[1]...
1
vote
1answer
513 views

Ubuntu Server - OS on single HDD, file server on software RAID 1

I run a Windows Server 2008 machine. It is used as a file server (File Services feature), in addition to local shares I use CrushFTP for SFTP and HTTP access to my files. I would like to convert to ...
7
votes
4answers
7k views

Monitor disk health using smartd (in smartmontools) on a high availability software RAID 1 server

I have a server with three identical SATA/600 3TB drives: /dev/sda, /dev/sdb, /dev/sdc. The drives are partitioned, using GPT with three partitions each: 1 MB: Reserved partition for boot loader 1 ...
1
vote
1answer
99 views

Can't swap between two bootable drives

I'm attempting to setup a 2-drive (sda, sdb) RAID 1 in my PC, using Raider to convert from my old single drive (sda) system to the new RAID 1. From sda, on sdb I ran: # raider -R1 # raider --run ...
1
vote
2answers
397 views

Setting up a RAID 1 in Funtoo [closed]

In short Following the guide How to Set Up a RAID 1 Under GNU/Linux, I have setup a RAID 1. Checking the RAID Array for validity in various ways, appeared to be normal. However, after rebooting the ...
3
votes
1answer
2k views

mdadm - Accidentally ran “mdadm --create” on an existing raid-1. The superblock is now corrupt and I am unable to recover data. Did I bork my data?

I have /dev/sdb1 and /dev/sdc2 that were previously setup into a RAID-1 with mdadm, but then I reinstalled and lost the old configuration. Out of idiocy, I ran sudo mdadm --create /dev/md0 --level=1 ...
0
votes
2answers
620 views

Need to Break RAID 1 on Linux Server

On one of our server Hardware RAID1(mirroring) is configured. Now we need to break the RAID1 and simply use the other Hard disk separated from RAID to extend the LVM on that server. Can some one tell ...
0
votes
2answers
1k views

Can disks be accessed independently in a RAID-1 volume?

I want to create a RAID-1 array with Debian 6. This array will contain 6 disks, 3 for the OS and 3 mirrors. I used this RAID before but on windows, and maybe I didn't do it good at all, because I ...
1
vote
1answer
252 views

How to rebuild a two drive raid 1 array on Linux?

I need to rebuild a two drive (160x2) raid 1 (mirror) array. It was an Intel raid from a 7 year old Dell computer (Windows). Both drives are assumed to be functioning. The raid was created with an on-...
2
votes
1answer
2k views

convert /dev/md0 to /dev/sda1

I used a Software-RAID I and want to access the data without RAID now. After mdadm --fail /dev/md0 /dev/sda1 mdadm --remove /dev/md0 /dev/sda1 I tried mount -t ext4 /dev/sda1 /mnt but dmesg ...
1
vote
2answers
784 views

Can't remount local file systems for read-write (RAID1)

I assembled a new machine on Asus P9X79 motherboard, using its RAID controller to create a RAID1 array of two 500Gb drives. When booting Arch from an external drive I am able to work fine with /dev/...
2
votes
1answer
6k views

How to set up disk mirroring (RAID-1)

I have a computer with two WD 1TB drives and I want to configure disk mirroring on it. I tried setting up RAID during the installation by creating RAID partitions but that does not work for me. Is ...
2
votes
0answers
139 views

Ubuntu 10.04 LTS hangs at 43% of preparing to partition raid 1drives

I have set up hardware raid 1 with two SAS drives using the Adptec 6405E controller. I am having a problem when installing Ubuntu 10.04 LTS as it hangs at 43 % when partitioning disk drives. So far ...
3
votes
2answers
199 views

RAID Lag-Behind Burst Write

I would like to setup RAID1 so that a ramdisk in the RAID configuration has occasional synchronisation with a physical disk (that is very battery intensive to run, so I hope to let it spinout). Is ...
2
votes
1answer
442 views

“error: no such device” at boot in Ubuntu Server 11.10 with Raid1

I have a configuration of 4 HDD's as Raid1 2 pairs of 2 HDD's. First Raid1 pair is for system, so I just made an 40GB space for swap, and the rest of it for the root, the second pair of Raid1 is for ...
4
votes
1answer
3k views

Why does btrfs allow to create a raid1 with mismatched drives?

I'm creating a btrfs using sudo mkfs.btrfs -m raid1 -d raid1 <small-disk> <large-disk> or sudo mkfs.btrfs -m raid1 -d raid1 <large-disk> <small-disk> it creates the fs with ...