Unix and Linux Stack Exchange
Unix and Linux Stack Exchange

Questions tagged [raid0]

27 questions
16
votes
3 answers

How does RAID0 work underneath, when the devices have different sizes?

To my surprise the CentOS 7 installer allowed me to create a RAID0 device consisting of roughly a 17 GB disk and a 26 GB disk. I would've expected that even if it allows that, that the logical size would be 2 * min(17 GB, 26 GB) ~= 34 GB. Yet I can…
hbogert
  • 729
  • 9
  • 23
3
votes
1 answer

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 it to do I/O operations to stress a specific set of…
ron
  • 5,749
  • 7
  • 48
  • 84
3
votes
1 answer

Extending RAID0 with `mdadm --create --assume-clean`?

I had a 1-disk RAID0 array that I created with a view of adding more disks to it eventually, that was working normally. I created it with (approximately): $ mdadm --create /dev/md0 --raid-devices=1 --level=0 /dev/sdb -f Then I added another disk to…
Anton Tykhyy
  • 133
  • 1
  • 4
3
votes
1 answer

BTRFS has become unmanageable

I'm struggling with a btrfs RAID0 filesystem. It's expanded on 4 disks but i need to remove one of those disks. This is the current status of the filesystem: [root@osgiliath detlev]# btrfs fi show /mnt/Data/ Label: 'Data' uuid:…
Detlev Casanova
  • 31
  • 1
2
votes
1 answer

How do I set up RAID0 using extra two drives?

I have been looking around for a suitable tutorial to help me set up a RAID0 across two (or more) drives, but not moving the actual installation of Linux Mint onto that RAID setup. A coworker had pointed me to this tutorial, and I could not make…
Phill.Zitt
  • 121
  • 1
  • 3
2
votes
2 answers

Is it possible to keep data in procedure Raid1 growing to Raid5?

I have Raid 1 /dev/sda /dev/sdb as md0 then now I want to expand for Raid5 So, my idea is sudo mdadm --add /dev/md0 /dev/sdd sudo mdadm --grow /dev/md0 --level=raid5 --raid-devices=3 In these processes. The contents in the HDD will be deleted or…
whitebear
  • 165
  • 2
  • 9
2
votes
1 answer

Is it possible to clone Linux software RAID 0 array with LVM on top to a single HDD?

I have 2 500GB HDD in 3 software RAID 0 arrays with LVM on top. Both disks are partitioned: -MBR partition table -256 MB Physical volume for RAID -4 GB Physical volume for RAID -remaining 496 GB Physical volume for RAID Is it possible to…
steeef
  • 21
  • 2
2
votes
1 answer

raid5 array reassembles as raid0

I found simmilar problem here: Missing mdadm raid5 array reassembles as raid0 after powerout, but mine is a bit different. Here too my raid5 reassembles as raid0, but i don't see any of my devices marked as spare in mdadm -E /dev/sdX1 output:…
upratathlavu
  • 21
  • 3
2
votes
1 answer

'PARTUUID' in '/etc/fstab' and (hardware) RAID0 don't play well together, do they?

Fresh Arch Linux install on (hardware) RAID0 under 64-bit UEFI system with GPT partitions. Had to add MODULES="ext4 dm_mod raid0" HOOKS="base udev autodetect modconf block mdadm_udev filesystems keyboard fsck" into /etc/mkinitcpio.conf so that…
Alexander Shukaev
  • 127
  • 1
  • 9
2
votes
1 answer

Unable to boot after installing grub for new Arch Linux Install on Acer S7

I have followed the instructions on the Arch Linux beginner's guide to do a dual boot on an Acer S7-392. I only did not do the initramfs part and I did not create the partitions at the install since I used another tool to create the partitions…
BlueTrin
  • 141
  • 6
2
votes
1 answer

Adding badblocks on mounted partition

I tried to move some files to my NAS (ShareCenter DNS-320), but something shows up, when using file managers: Input/Output error or when using rsync on mounted cifs/smb share rsync: close failed on…
Kokizzu
  • 9,257
  • 12
  • 55
  • 82
1
vote
0 answers

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 activity on the partitions since I shut down the old…
Bruce
  • 131
  • 6
1
vote
1 answer

btrfs RAID0 - should I stripe or duplicate metadata?

I want to use btrfs with raid0 on three nvme drives. These should contain the operating system and most application files, whereas valuable user files will be on a network drive or seperate disk. What is there any point in duplicating metadata with…
Andreas Hartmann
  • 161
  • 11
1
vote
1 answer

MDADM creates additional block devices

I noticed a strange issue when creating RAID array with mdadm. As far as I see, it creates additional devices of md type. According to the kernel.org documentation, the md device type is Metadisk (RAID) devices. The metadisk driver is used to span…
Alan Kis
  • 273
  • 3
  • 5
  • 13
1
vote
0 answers

How to convert RedHat 7 Raid 0 system from UUID to device (sda/sdb)

I'm trying to create an image of an RHEL 7.6 Raid0 device. I've eliminated the UUIDs from grub.conf, but the target device is still failing on boot because it's looking for the UUIDs from the source device. I think the raid configuration is the…
Jack BeNimble
  • 165
  • 1
  • 12
1
2