Questions tagged [raid1]
The raid1 tag has no usage guidance.
177
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Very poor NVMe software raid1 write performance on Ubuntu 22.04
I'm experiencing very slow writes with raid1 ext4 (2x Samsung SSD 980 1TB).
The average write speed is something around 80MB/s.
I detached one NVMe from raid1, reformated it as a single ext4 partition,...
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1
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20
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Linux RAID1 replace disks with higher capacity
I have a server which has two 256GB SSDs. They were partitioned as following:
/dev/sda1 100GB linux-raid-autodetect
/dev/sda2 100GB linux-raid-autodetect
/dev/sda3 23,6GB linux-raid-autodetect
/dev/...
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1
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What is the difference between BTRFS RAID1 and BTRFS RAID5 on 3+ devices?
According to "Examining btrfs, Linux’s perpetually half-finished filesystem", BTRFS RAID1 is said to be "guaranteed redundancy—copies of all blocks will be saved on two separate devices&...
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What's the best method to raid1 a btrfs and efi boot drive?
I have two NVME drives, one of which is already working as I want and I boot off of it: it has two partitions one for EFI, one for the BTRFS Linux filesystem.
Device Start End ...
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How to create a data-redundant encrypted filesystem on an external SSD?
What's the easiest way to format an external SSD with encryption and RAID1-style data replication?
As I recently grew suspicious of my SSD+luks+btrfs setup, I've started wondering how to reduce risk ...
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1
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48
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Recovering data from old RAID 1 NAS drive
I'm trying to recover data from an old NAS drive that failed. I'm not sure of the cause of failure, but the files are relatively intact on the drive, and I've been able to pull some stuff off in the ...
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1
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119
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How to extend madam RAID1 with LUKS and ext4 filesystem on Debian 10
I am trying to expand an existing RAID1 array with an ext4 filesystem on a LUKS volume on Debian GNU/Linux 10 (buster).
This is my disk layout from lsblk:
NAME MAJ:MIN RM SIZE RO TYPE ...
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48
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FreePBX distro on CentOS failed to boot with RAID
I have a regular FreePBX (latest 7) distro with LVM RAID1 volume on two physical disks. After power fail it can't boot and drops to emergency mode.
Main LV is inactive and I can't enable it because ...
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2
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175
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Recover mdadm raid1 built with full disks (overwritten partition data)
While setting up my new PC I also setup a new RAID 1 with 2 drives with LUKS on top.
After copying all the data to it I made sure everything was usable and afterwards shredded the old drive.
But now I ...
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51
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Raid profile missing or gone after drive replacement
I have a 5 year old PR4100 with 4 x 2TB WD red's. It was always configured in the default Raid1 setting. A week ago, my PR4100 showed a red led on the first drive. My files were still accessible and ...
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57
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Trim and btrfs with raid1
I know that btrfs support trim/discard, as a mount option or manually (fstrim -A).
I want to made a raid1 of ssd, I will get any problem with trim?
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1
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89
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Creating a new raid1 mdadm luks device creates two unwanted partitions
I am trying to create a raid1 (with mdadm) device with luks. However, it creates two partitions instead of one as you can see below:
sde 8:64 0 3,6T 0 disk
`-sde1 8:65 ...
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58
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RAID mirroring with mdadm: should I use a partition or the raw hard disk?
I have several RAID1 mirroring hard disks, I recently replaced one failed hard disk but now mdadm shows that the new device is not using any partition but the "raw" hard disk. To be more ...
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108
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mdadm "superblock doesn't match others" when assembled with uuid, assembles fine with device names
I replaced the drives in a mdadm raid1 array by adding 2 new drives and then failing and removing the old ones, and now this command fails:
~ # mdadm --assemble /dev/md100 --uuid=325a2f12:18b827f7:...
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Can reads from an MD RAID 1 be inconcsistent?
While a RAID 1 gives the benefit of redundancy I'm trying to understand whether using a RAID can lead to inconsistencies under any circumstances (I/O errors, not disk, ...).
In an effort to understand ...
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Recover files from Linux Raid1 member disk - as bad as it gets
I hope you´re doing well.
I work as a technician in an IT company focused on Windows systems and cloud stuff, hence my knowledge to Linux is sadly very limited. So please excuse any dumb questions but ...
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Problems after creating mdadm RAID-1: disk identifier 0x00000000 and same serial number on both disks
I need your help with a problem that I’ve been trying to solve for days now.
I recently purchased a Western Digital (WD) My Book Duo, and after setting it to make it work as two independent disks I ...
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1
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1
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104
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Linux mdadm + LVM2: "Cloned" logical volume across three RAID1 blocks?
My disk setup in a Debian Linux box shows like this:
> lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 931,5G 0 disk
├─sda1 8:1 0 ...
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380
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mdadm shows wrong array size, and can not growing
I used 2 partitions to create a RAID1 array.
both of them are 967131168 sectors, 512 bytes per sector.
so the raid array size should be 483564544.
but it shows:
Array Size : 483433472 (461.04 GiB ...
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2
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1k
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Raid 1 on two partitions: is this a good thing to do?
So, I have a 2TB HDD (sda) and a 500GB one (sdb). I created a partition on sdb occupying the entire device (sdb1), noted how large it is, and then I created a partition on sda the same size (sda1).
...
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Fixing missing superblocks on both RAID1 disks using mdadm
My RAID1 array was working fine at /dev/md128 but seems to have completely disappeared after a reboot, with mdadm reporting both disks are missing superblocks. My question is how to fix this?
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mdadm: after a re-install, two raid1 partitions were relabeled raid0 but the data are raid1
Maybe the simplest thing is to just mount one partition by itself read only and pull the little bit of data not fully backed up and rebuild from scratch.
Otherwise, since there has been no I/O ...
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Mounting LVM partition on a RAID1 disk from a bricked QNAP NAS
I have a QNAP HS-251+ NAS with two 3TB WD Red NAS Hard Drives in RAID1 configuration. I'm quite acquainted with Linux and CLI tools, but never used mdadm or LVM so, despite knowing (now) that QNAP ...
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MDADM RAID-1 arrays always do automatic check after booting from a several-day long shutdown
I have multiple PCs with Fedora 35 and RAID-1 MDADM arrays.
Among them, only one is facing a weird problem:
If I leave it shutdown for more than 2~3 days, it will definitely perform an automatic check ...
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164
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Primary GPT table corrupt (RAID-1 and mounted as /home) stopping me reinstalling Linux
Env: Linux TRANQUILITY 5.3.18-150300.59.49-preempt #1 SMP PREEMPT Mon Feb 7 14:40:20 UTC 2022 (77d9d02) x86_64 x86_64 x86_64 GNU/Linux Also OpenSuse Leap 15.3 with KDE Plasma 5
When I run the OS ...
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76
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OS and addtional software raid is it a good approach?
A friend of mine wants to use a root server for his wordpress pages.
His idea is to use one SSD as main drive for the OS and two HDDs for WWW-Root and database data.
The idea is to use both HDDs in a ...
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362
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Recover data from RAID1 with one disk in rebuilding state
I am attempting to recover data on a MDADM RAID1 array with one HDD that suffered a mechanical failure and another that is stuck in a rebuilding state.
I have two 2TB HDDs that were installed on a ...
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1
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686
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Is it possible to avoid cached data duplication in bcache and Btrfs RAID1?
There is a possibility to attach single bcache cache drive to multiple backing devices. Since bcache is not aware about filesystem which lies on top, this means it is not aware about any software RAID ...
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1
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195
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Can't make an ext4-partition on a specific raid
I have a hardware raid-1 on two WDC-SSDs with 500GB on each SSD. The raid controller is a Marvell-88SE9128 via two GSATA connections (the controller is directly on the motherboard and not an ePCI ...
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slow access/reads of linux md raid1 array
I have a Linux md-raid raid1 array (ext4 fs), with 2 3TB disks. The array has been showing significant slowness in access and read times over the last few months. Doing an ls on a directory w/ less ...
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3
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MDADM - Adding a new hard disk to an existing RAID1
my dedicated server has a RAID1 array with 2x1TB HDD
It is filling up
i want add new hard disk (It has already been physically added)
I have no idea how to do it.
I'm afraid of losing data
I found ...
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802
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How to install GRUB2 on shrunken RAID1 disks?
TL;DR:
Trying to install GRUB2 on block devices that are in RAID1. Stuck at installing bootloader.
Goal
to replace HDD-s with smaller SSD-s. Here are the steps that I've taken:
# Booted into rescue ...
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2
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1k
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JBOD: How to Raid1 drives with different capacities? Btrfs, ZFS?
I have selection of hard drives, with capacities:
1 TB
500 GB
320 GB
250 GB
I'd like to make Raid1 out of them, in the sense, that copy of any data will be always on two drives out of four I have. ...
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2
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1k
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How to recover Data after "mdadm zero-superblocks"
I wanted to swap from CentOS to Openmediavault. I had a RAID1 with mdadm in place and wanted to split it again into two separate disks. The Guide (Similar to ArchWiki) told me to do the following:
...
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RAID1 as a personal desktop backup system, pros and cons
I'm seriously considering ways to safeguard my data since I'm really tired of loosing files because of bad redundancy.
I was reading about RAID1 and it seems a very practical method of keeping updated ...
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449
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Is there any non-destructive way to change the preferred drive in a raid1 mdadm setup?
I have observed empirically that for a raid1 mdadm array, mostly serving sequential reads from single processes, the first disk is basically always picked. This is also confirmed by this code which ...
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3
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684
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mdadm RAID1: can you grow to 3 disks, then revert back to 2?
I have a Linux (CentOS7) software RAID1 system with two disks which are getting old. One has been starting to show signs of failure. I'd like to phase these disks out one at a time with new disks ...
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Replace missing Btrfs RAID-1 device - btrfs replace and balance?
Recently, I replaced a device on two Btrfs RAID-1 filesystems because disks needed to be replaced.
I did it like this:
mount -o noatime,degraded /dev/sda3 /mnt/tmp
btrfs fi show /dev/sda3
btrfs ...
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851
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mdadm - root raid1 partition wont boot ( device not found )
I had some soft raid issues, so i booted with SystemRescueCD and recreated / raid mirror ( md2 ) with "--create" option ( maybe that was a failure moment ). So on RescueCD boot all raid ...
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What are the implications of Flatcar Linux's root filesystem RAID limitations?
As described here, not all partitions of Flatcar Linux's root filesystem support RAID 1
Other system partitions, such as USR-A, USR-B, OEM, and EFI-SYSTEM,
cannot be placed on a software RAID array
...
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985
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Is it possible to split a single Raid 1 array pair and mount a single disk?
I'm having a lot of problems with raid 1 arrays on my server.
Is it possible to split a raid 1 array into two seperate disks, and mount one, or either of them, as regular disks.
The raid 1 devices ...
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567
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MDADM RAID1 Creation - Which device is "master"?
In a RAID 1 config with MDADM, which device is the master device during the initialization process?
In a RAID 1 config with 2 devices, presumably (?) one device acts as a master and the other as a ...
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Identify bad disks which is in OS HW RAID
We have servers where a CentOS OS disk is in hardware RAID 1, however we couldn't determine if there was a disk problem until both disks failed.
smartmontools seems like it doesn't work well for this ...
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Replace 500GB raid1 with 120GB raid1 with mdadm
I have a home server with two mirrored (soft raid1 with mdadm) 500GB HDD that contain the operating system. I would like to replace both the drives with two 120GB SSD mirrored in raid1 the same way. ...
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2
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335
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RAID1 primarily used disk
I'm kinda new to the setup of raid-drives.
So my current setup looks like this:
Disk1: 1x NVMe DataCenter Edition 960GB ("low" IOPS)
Disk2: 1x NVMe Octane 480GB (high IOPS)
Disk 1 has 3 ...
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191
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Attempted to replicate partition table to replacement RAID1 disk, but source partition table now empty
I had a disk (/dev/sda) show signs of eventual failure in a RAID1 array, so I failed and then removed it from the array.
I then replaced the disk, booted back up, and began the process of replicating ...
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1
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2k
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Why am I getting this "File exists" error trying to mount unmounted filesystem?
Help greatly appreciated.
I have a hot swappable USB C 3.1 5 bay storage device (https://www.amazon.com/dp/B07VMK6ND7/ref=cm_sw_r_cp_taa_BETlFb399BQF4) attached to a Debian box.
1st 2 bays are a 4tb ...
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336
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LVM: on simple raid1 with two legs Cpy%Sync never reaches 100% and always stays at 99.99%
On simple lvm raid1 with two legs Cpy%Sync never reaches 100% and always stays at 99.99%.
lvm> lvs -a -o name,raid_sync_action,sync_percent
LV SyncAction Cpy%Sync
safe ...
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797
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Ubuntu 20.04 Software RAID1 File System Read-Only after power-outage
I had a short power outage today and the new server I was working on was shutdown unexpectedly as a result. It still boots up, but it's rendered unusable as it keeps reporting the file-system as read-...
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916
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how can I move RAID-1 hard disks from one Debian to another?
I have a computer with Debian. On this computer I have two hard disks which are configured as RAID-1, which are mounted as "/" (as a root). I want to move these disks (without wiping, formatting them) ...
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