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Questions tagged [software-raid]

RAID solution handled by the operating system.

Software RAID is implemented in the OS. It uses CPU to handle the RAID setup. It is cheaper than hardware raid. It often doesn't support features which you can find with hardware raid like:

  • hot spare
  • fast rebuilding of an array
  • hot swapping
  • high write throughput

Another problem is that it uses the CPU and memory of the computer to perform all the tasks (hardware raidcards have a special cpu and memory for this task). Therefor generating more load on your system.

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OS doesn't recognize harddisk at inital startup but after reboot

I have a Debian 11 server with 4 HDD. Two of them are in a Raid 1 array. When I shutdown the server completely and then turn it on again, the boot routine stops because it cannot find the Raid 1 device (the device is listed in fstab by it's…
matzr
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How to delete Software RAID1 partition?

I have Debian 11 server with software RAID 1 without lvm: root@debian-base ~ # lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT nvme1n1 259:0 0 3.5T 0 disk ├─nvme1n1p1 259:1 0 4G 0 part │ └─md0 9:0 0 4G 0 raid1…
MAMProgr
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Best way to clone a single disk from a Software RAID1 Array in Linux server

How can I clone a single HDD bootable disk from a Software RAID1 Array in Linux server? It is currently a two-disk HDD mirror array. I have physical access to the server, and it has empty bays for disks. I'd like to leave the RAID1 array the way it…
jamminjames
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RAID patrol write to force sector remap/rewrite?

So I have a HPE S100i SR Gen10 software RAID 1 device that hosts 2 SATA SSD's for a Windows boot partion. The HPE Storage Array management software looks like it found a problem on the SSD's during a patrol read... Warning: This logical drive has…
Asteroza
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mdadm RAID1 degraded but shows active partition on non-present drive

I ran into an issue with a degraded mdadm RAID1 array on a server I inherited: The server has two identical M.2 SSD drives with 256GB capacity each in a RAID1 config via mdadm for the operating system (Debian 11). The partitions on the drive…
heeeresjohnny
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mdadm RAID5 mismatch, which file(s) on ext4 filesystem are affected?

After a scrub of my 4-disk RAID5 mdadm array I got these log entries: Dec 03 07:20:53 srv10 kernel: md1: mismatch sector in range 204340608-204340616 Dec 03 07:20:53 srv10 kernel: md1: mismatch sector in range 204340616-204340624 Dec 03 07:20:53…
MrCalvin
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How to have a RAID1 accessible from both Ubuntu and Windows?

This topic has been discussed many times, but i didn't find anything specific to my situation. I would like to create a RAID1 with 2 sata drives (same brand, model,capacity). My objective is to have this raid accessible from both Windows and Ubuntu,…
Ceccoclat
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Insufficient suitable allocatable extents error when performing RAID takeover

To improve performance while still keeping redundancy, I am trying to convert the root file system of a NAS from a RAID 5 logical volume to a RAID 10 logical volume, while keeping the same number of disks used. In this section of the lvmraid man…
Marwi
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Removed failed disk from

I have a problem with a software raid running mirror. One disk is dead and the server cannot find it. Normally I would have removed it as well. mdadm --manage /dev/md0 --remove /dev/sda1 But after it can't see the bad disk I got an error saying it…
The Tech Guy
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Growing a RAID-10 on Synology NAS?

I was hoping to add two additional disks to my Synology NAS. Currently it is configured as a four disk RAID-10, no SHR, BTRFS, single volume system. Unfortunately extending a RAID-10 is not possible via GUI but it is possible according to the…
TylerDurden
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Shrink one of the disks in a multi device BTRFS filesystem

My root partition is running out of space and I have no other SATA slots. I have a BTRFS raid0 and I would like to shrink one of the partitions I used for the BTRFS-raid0 and add it to the root partition (make it raid0). How can I do that? The…
berinaniesh
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Slow read speed in ZFS mirror (slower than write speed, and very slow for small chunk sizes)

I have a server running debian on top of a ZFS 3-way mirror of Exos X18 18TB (ST18000NM001J). I'm benchmarking it and I'm finding some surprises for the read rate under certain conditions. But first, for the benchmarking I created a benchmarking…
Héctor
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MDADM Nvme raid Slower than traditional HDD, need enlightenment

I have setup server about 20 days ago with new nvme, before setup raid mdadm the two Nvme samsung 980 pro 1TB i test bench have IO speed average 1.5G/s each nvme, but after creating raid 1, IO nvme only about 70mb/s. and still fast traditional HDD…
Trweb
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How to convert mdadm raid1 to single driver and keep the data?

I have a raid1 created by mdadm in the root partition on /dev/nvme1n1p2 and /dev/nvme0n1p2, efi boot partition is on /dev/nvme1n1p1. Then I followed some commands to remove one of the disks and formatted it to mount in /media. mdadm /dev/md0 --fail…
maP1E bluE
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Unable to Install Linux Mint on RAID

Second week now than I'm trying to setup Linux Mint on software RAID5 without success. I'm able to setup the software RAID5 on the live CD with three 240GB SSD, then the installation setup fails to install the GRUB on /dev/sda Picture 1 Knowing that…
Guillaume G. Soucy
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