Questions tagged [raid]

RAID - Redundant Array of Independent Disks. A Storage technology to provide redundancy and performance, to reduce I/O bottlenecks involved in using multiple disks for large storage.

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linux stress, impose work on specific disks

Have a server running centos 7.6, and it has 4 ssd's as Raid-0 mounted as /scratch/ I have the linux program stress-1.0.4-16 and I just learned stress-ng existed. Is there a way with stress to tell ...
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Investigating a failed drive in a raid array

Is there any way to determine what may have happened in the following scenario? We have a RAID5 that should have been originally built with 5 drives. As it stands, this is some of the state that I'm ...
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Linux softwar RAID or SDD failure?

I rebuild a machine recently, and decided it would be fun to do RAID on some SDDs. It has not been going well, and I'm having trouble figuring out what is going wrong. I have 2 8 TB HDDs in RAID 1 ...
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Is it safe to reboot linux just after an lvextend?

I'm wondering how safe it is to reboot a Linux install just after I did an lvextend on a mirrored partition. I can see that the partition is being mirrored properly as the HDD light is light solid. ...
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How to format HDD which is using raid?

I have a laptop which raid has installed on it, and I have two devices sda & sdb for my storage unit and its raid, I want to completely format both the discs. I have come up with the following ...
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Boot Fail - Extend LVM (“root”, “/”) over RAID 1 (CentOS 7)

QUESTION: CentOS 7 does not boot after we extend a Volume Group (VG) over RAID 1 using another RAID 1. The process we use is demonstrated in PROCEDURE: Extend LVM ("root", "/") over RAID 1. What is ...
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mdadm create raid 5 stopped after ony few hours

I'm trying to setup a raid 5 for my Nextcloud but when I run the mdadm --create command it stops. Here is my configuration : Disk /dev/sda: 2.7 TiB, 3000592982016 bytes, 732566646 sectors Units: ...
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Shrink JBOD/linear Raid on synology

I had 2x6TB drive and a JBOD volume because the data isn't really critical and couldn't afford to lose half the space for a raid 1. Now (a couple years later) I bought 2x8TB new drives for my 4 -bay ...
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How to mount a RAID1 drive?

I have a 2TB drive from my two-bay Synology NAS that I want to access via Linux Mint. fdisk shows: root@HUB:/# fdisk -l Disk /dev/sda: 111.8 GiB, 120033041920 bytes, 234439535 sectors Units: ...
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Software recovery of 3ware RAID?

Is there any software or instructions out there on how to get data off of a 3ware RAID set (using RAID5) when the controller doesn't function? I have the controller still, but it won't work properly ...
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Confused about RAID 1 capacity

Is it true that a RAID 1 can only be as big as the smallest disk? If it is true, then ten 1GB disks in RAID 1 should only amount for only 1GB of total available space. Is it true that RAID 1 capacity ...
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Getting an error “appear to have very similar superblocks”. Ways to fix it?

So something strange is with my partitions. root@rescue ~ # mdadm -A --scan mdadm: WARNING /dev/sdb1 and /dev/sdb appear to have very similar superblocks. If they are really different, please --...
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Migrate Single Disk to RAID [duplicate]

I have a home server running Centos 7 that I'm using to host various different servers - a webserver, two Minecraft servers, and a PLEX server. Currently I have a 4TB HDD which serves as the primary ...
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systemd Time out waiting for device dev-mapper-vg

I've got a Debian Jessie system and I'm trying to recover this onto a RAID 1 with LVM. I've got a RAID1 over two 2TB NVMe drives and my /boot is on a USB booting in Legacy mode to Grub2. That bit ...
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Linux Mint doesn't recognize Disk

i have a lenovo ideapad s340 with win 10. When I install linux Mint the installer doesn't recognize the ssd. I found online that the problem is the sata Raid option . So i need to switch from Raid to ...
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Order of disks when using mkfs.btrfs with raid10

I need to create a raid10 array with btrfs. The raid will be handled by btrfs directly (not mdadm), since, I believe, it gives more information to the btrfs layer to detect and handle failures (am I ...
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Setting up RAID array in Centos 7 with non-empty and empty disk

Trying to create a RAID array implementation for Linux Centos 7 VM in Azure cloud. The VM already has two data disk out of which one acts as backup. I am trying to add another additional data disk ...
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How to recover RAID0 with MegaCli64? [closed]

I have a RAID0 drive consisted of two SSDs. I accidentally removed one SSD and insert it back immediately. How can I recover the data? I marked the reinserted disk as good and cleared the foriegn ...
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Soft Raid5 failed, bad sectors

I have a Soft Raid 5 managed with mdadm on a ubuntu 16.04.02. 3 disks WD Red 3TB, for data only (system is on ssd). sdb, sdc and sdd Last week, after reboot, the system did not startup, after a while ...
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Fix mdadm RAID1 inconsistencies using btrfs/zfs checksums

I prefer mdadm RAID1 vs btrfs RAID1 because: With btrfs, all read requests from the same PID go to the same device bcache coverage is doubled using a single mdadm RAID1 device vs btrfs with 2 ...
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RAID5 repair froze on NAS, trying to restore with mdadm now

I am running a Zyxxel NAS540 with 4x4TB Hard Drives. A few days ago the NAS started beeping and I saw that the RAID is in a degraded state. Since one of the drives had really bad SMART values, I shut ...
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Centos, add existing raid0 without lossing data

i had reinstalled centos 7 which has raid0 working fine previously. now my partition look like this: [root@ns31132644 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 223.6G ...
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RAID device won't mount in OpenWRT

I'm trying to get my RAID 1 device to work after I upgraded my router's OS (based on OpenWRT). The RAID device is listed as /dev/md0: # lsblk -o NAME,SIZE,MOUNTPOINT,STATE,FSTYPE,MODEL,SERIAL,UUID,...
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Add a disk to grow LVM Raid5

I have an LVM VG with a single LV that is a raid5 volume with three PVs. I would like to add an additional PV to the volume group and extend the raid5 LV to use it. Here I am using 4 100MB files as ...
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Recreating a RAID4 / RAID0 array

At first, there was a RAID0 array, to which I've added a new disk by issuing mdadm --add but when I've done that, the drive started to fail because of the power issues and the array has not started ...
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What should I expect to see if md/linux RAID is properly compensating for a failing drive?

Does the md subsystem output any messages (to syslog/systemd-journal) to indicate that it's running in a degraded state (or anything else that might indicate that it has successfully reacted to a ...
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My RAID 1 always renames itself to /dev/md127 after rebooting | DEBIAN 10

PROBLEM I create a RAID 1 configuration, I name it /dev/md1, but when I reboot, the name always changes to /dev/md127
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Error with Vagrant creating 2 HDDs and installing mdadm for the later configuration of a RAID1

WHAT I WANT TO DO Raid1 configuration on debian buster, with 2 HDDs of 1GB. Also, I want to automatically install mdadm so then I can access the machine and configure the RAID1. IMPORTANT The RAID1 ...
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Software RAID slows down while emptying buffer

I am experimenting with mdraid in CentOS 7.6, trying to understand these results from fio. I am doing a sequential write to a 4 stripe array, and the speed starts out good while it writes to the RAM ...
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mdadm software raid question

Hoping someone can help! Never used software raid before and I've noticed the 2 disk RAID 1 is showing as degraded [U_] : # cat /proc/mdstat Personalities : [raid1] md1 : active raid1 sda3[0] ...
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How can I speed up mdadm integrity check stuck at USB 2.0 speeds?

I have an array (/dev/md2) that is constructed with mdadm as a RAID5. The drives are connected in an external enclosure over USB 3.0 and when tested with hdparm show a read speed of 225MB/s. However,...
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Spin down of Icy Box Raid Enclosure not working

I am running Ubuntu server 18.04 and I am using an ICY BOX IB-RD2253-U31 enclosure with two WD Black disks (no NAS disks) in RAID 1 mode (mirror). I want to put the two disks in sleep mode / spin ...
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How effective is a Linux mdadm RAID 1 against silent data corruption?

Assuming I've stored an image file on a regular hard drive. Years later, I may not be able to fully display this image file because of a hardware error. Would a Linux RAID 1 disk array created with ...
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mdadm RAID arrays missing devices

I am running a home server with three RAID1 arrays, each with two drives: md0, md1 and md127. After an accidental reboot, md0 and md1 are running on one device only, and I cannot add back the ...
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ZFS Drive both in pool and hot spare?

I'm running a RAIDZ2 setup on my server. This is mounted as /NAS, and not involved in the boot process. Running Ubuntu Server 18.10. I had two drives go out on me at the same time. I have already ...
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KDE Partition Manager wrongly reporting disk usage for Btrfs RAID 0

Am I doing something wrong or is there a reason why KDE Partition Manager does not report correctly the memory disk usage of the devices I am using for a Btrfs RAID 0? jose@gentoo ~ % sudo btrfs ...
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Power Disconnect causes /etc/fstab issue

I am running Ubuntu 18.04 and recently installed two new hard drives running a RAID 1. But when I shut down and unplug the computer, plug back in the power, then turn the computer on, I get a message ...
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RAID1 recovery process skipping bad blocks

I have a RAID1 array with one sligtly damaged disk /dev/sdb. I put a fresh hard disk /dev/sda into this array in order to mirror sdb (then I’m gonna replace sdb with a fresh HDD). # cat /proc/mdstat ...
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centos 7 with adaptex and problem with snmp

I have a supermicor server with centos 7 and adaptec 6504e and i monitor all of my servers hard disks by snmp with observium, i followed the adaptec user manual for enable snmp sub agent but observium ...
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How to bind hard disks to /dev/sd* names statically?

Maybe it's an XY Problem, so here's a full situation: We have lots of servers now which will be used as storage/databases. All of them have similar setup: SSD drive for OS (Ubuntu 18.04.2 LTS) and 6 ...
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Why will this LVM RAID1 system not boot?

Context: while trying to install Arch Linux with an LVM setup including RAID1 for my root volume, I encountered the problem that I described here on the Arch Linux fora. I never found a solution to ...
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How to find which disk is being written to/read from in an LSI HW RAID logical volume?

On this system there is a lot of "await" which is causing slow response. i need to find out which disk behind the LSI logical volume is slowing it down... IBM blade, 2 HDD with LSI RAID (LV simple ...
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Which filesystems contain data loss prevention mechanism?

im unable to google this one out: which filesystems are available, which contain any form of a data loss prevention in case the medium (hdd) itself will become faulty? and potentially automatically ...
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Drive failure(s) in linux mdadm raid array. Help!

It looks like my system is suffering from some sort of catastrophic failure, and I'm panicking at the moment, not sure what to do. I had a 3 drive raid 10 array. I noticed this morning that I was ...
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mdadm RAID5 with bad sectors and bad blocks

I have a 4 disk RAID5 setup with mdadm in Ubuntu 16.04. sdb : good sdc : 8 bad sectors according to SMART, 8 pending, 4 reported errors sdd : bad blocks present according to mdadm --examine sde : ...
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variants for a Linux fileserver cluster

I currently have two hosts and each with 6 disks. Each host has a Debian 9 installed and 2 disks are in a Software Raid 1 array. The other 4 disks are free and should be used for data storage. Now I ...
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How to install CentOS 7 over a *software* RAID 0 and RAID 5 configuration?

I'm configuring my home server, but I can't install CentOS from CD over a software RAID 0 or RAID 5. I can only set it up over a RAID 1 environment.  Unfortunately I don't have any PCI RAID controller....
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Setting up RAID1 with an active physical volume (Debian 9 stretch)

I've been trying to follow the following guide to set up RAID1: https://www.howtoforge.com/set-up-raid1-on-a-running-lvm-system-debian-etch I currently have two 6TB hard drives, I created a physical ...
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Hybrid RAID (SDD+HDD) gives unexpected results

I am doing some experiments with hybrid RAID in Linux. My test consists of the following: 2x256GB SSD in RAID 0 (/dev/md1) 2x256GB HDD in RAID 0 (/dev/md2) Then I made md1 and md2 into a RAID 1 (/...
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How to replace faulty disk in software raid using lvm

one of the SuSE 12 LinuxServers has reported disk failure. Fortunately the Database Server has Software Raid hence the system is still up and running. But as recommended, we would like to replace the ...