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Questions tagged [dmraid]

17 questions
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2 answers

Removing raid metadata from drives

Normally when I have a drive which contains raid metadata e.g. from fakeraid or a hardware raid card I can get rid of it with: dmraid -r -E /dev/sdX Or if that doesnt work, doing a simple dd if=/dev/zero of=/dev/sdX normally works But I have four…
Tiffany Walker
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How to remove a dmraid RAID1 member (mark as faulty)?

I have RHEL 6.8 installed on a fake Intel RAID1 (Intel Matrix). It's managed by dmraid, consists of sda and sdb and the device name is /dev/mapper/ddf1_4c5349202020202080862682000000004711471100000a28p1 Now I want to write something else to sdb. How…
basin
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1 answer

Striping LVM Across Multiple MD-RAID Arrays

I have a machine with three, fifteen drive mdraid RAID-6 arrays (md10, md20, md30.) These three arrays are then setup as physical volumes for LVM and combined into a single volume group. I then have been creating logical volumes from the VG using…
woodsbw
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2 answers

Reassemble RAID 1 array from old system

I recently upgraded my OS from RHEL 5 to 6. To do so, I installed the new OS on new disks, and I want to mount the old disks. The old disks are listed as /dev/sdc and sdd in the new system, they were created as a RAID 1 array using LVM, using the…
RD Miles
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1 answer

Linux - dmraid (or mdadm) - Rebuild RAID 10

A while ago I had a raid10 config crap out on me, and am now just getting around to trying to salvage the array so I can rebuild and move on with my life. Basically a drive in each subset failed, which means (in theory) I can recover. Versus if I…
Mike Purcell
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2 answers

Rebuilding a Raid 1

I'm trying to rebuild a raid 1 (dmraid+isw) unsuccessfully. I replaced the failed disk with a new one and the BIOS added it automatically to the raid. Running kernel 2.6.18-194.17.4.el5. dmraid -r /dev/sda: isw, "isw_babcjifefe", GROUP, ok,…
leave_britney_alone
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How to rebuild a dmraid RAID10 array?

Q: How do I force a rebuild? The following describes the scenario. I've been experimenting with forcing a RAID10 to rebuild, so I could see what dmsetup status output should look like when a RAID is rebuilding, and also so I could get some…
Sandra E
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2 answers

Damaged XenServer Storage LVM partition table

I have a homeserver running under XenServer control with 3x1TB discs inside, one for XenServer and two mirrored(using Intel's fakeRAID and dmraid) for VMs and a user data(but now I think RAID didn't work). I tried to pass PCI card to VM using…
jakubfijalkowski
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1 answer

dmraid/LVM Boot Issues After Upgrade to Ubuntu 18.04

I am experiencing an issue with dmraid/LVM after upgrading one Ubuntu 16.04 machine to 18.04. The root file system of this machine is located on a LVM LV on a RAID 1 consisting of two disks realized using dmraid. The boot process is dropping into a…
DigNative
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What are the pitfalls of having an "unbalanced" RAID1?

Context: I have a server with two 3TB NAS drives in a RAID1 (Linux dmraid) and I am looking to double storage capacity, but I only have one free drive bay. I could purchase two 6TB drives, but I had the thought that I could possibly get away with…
cdhowie
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RAID bus controller: Intel Corporation 82801JIR (ICH10R) SATA RAID Controller

RAID bus controller: Intel Corporation 82801JIR (ICH10R) SATA RAID Controller Subsystem: Super Micro Computer Inc Unknown device 0007 Is any one know which Linux utility I can install on my server to manage above said RAID device from command…
Suku
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How to fix when grub no longer mounts the boot partition at start up?

This system has a boot partition on a dm-raid device. I updated the system by standard methods from an older Ubuntu to the latest LTS. Now, if the kernel is updated by "apt-get upgrade", the new kernel will not load. Nor are the entries listed in…
ndasusers
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RAID5 Bad Superblock, not booting to OS

I've been running Ubuntu 12.04 LTS for about 6 months on a computer that has 3 180gb SSDs in EXT4 RAID5 configured through the motherboard's BIOS. The OS froze and computer had to be forced down. On boot after the BIOS it just hangs at a blank…
jchysk
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Headless server with an mdraid array won't boot

I'm in a bit of a pickle. I have a headless server (Acer EasyStore) running Ubuntu 12.04.1, which, after an update, now refuses to boot. It has four disks, one of which holds the OS in a partition and the rest, along with the other three disks, is…
Stavros Korokithakis
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Replace dmraid raind1 disk in CentOS 6

Replaced a bad /dev/hdb, and try to rebuild the raid1, but something wrong like: dmraid -dddvvv -R isw_chgadgfjjg_raid1 /dev/sdb WARN: locking /var/lock/dmraid/.lock WARN: missing dm serial file for /dev/dm-0 WARN: missing dm serial file for…
timy
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