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Questions tagged [mdadm]

A linux utility used to manage software RAID devices.

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Linux (FC14/i386) is raid1 intact after hot fs install? How to repair?

My older (FC11) install had reached EOL, and I tried to reinstall FC14 on its RAID1 root filesystem. I'm now having suspicions that now, after the install FS is not fully raided. The question is if this is suspicion is true, and if so, how to fix…
Marco van de Voort
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mdadm on ubuntu 10.04 - raid5 of 4 disks, one disk missing after reboot

I'm having a problem with the raid array in a server (Ubuntu 10.04). I've got a raid5 array of 4 disks - sd[cdef], created like this: # partition disks parted /dev/sdc mklabel gpt parted /dev/sdc mkpart primary ext2 1 2000GB parted /dev/sdc set 1…
Ben Williams
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2nd drive in RAID 1 keeps failing

I have a bit of a problem here. I have a Ubuntu Linux server set up with 2 SAS drives in a software RAID 1 (created with mdadm). The RAID will run fine for a day, I can do cat /proc/mdstat and it shows that both disks are active and everything is…
Safado
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RAID array was degraded, but "fine" at reboot

During boot, I got a message saying an md RAID array was degraded. My first reaction was to reboot. Everything appears to be working just fine now. All disks are active. What concerns me is that one of the disks is plodding along on a thin lifeline.…
moinudin
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growing EBS RAID volume

I've created a RAID0 configuration with two 1GB EBS volumes, mounted at /dev/md0 using mdadm and formatted with XFS Next, I copied some files over to fill the volume to around 30% of its capacity (of 2GB) I then created snapshots of the volumes…
Ryan Fernandes
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My server was used to boot (problem after MDADM raid rebuild)

My home-backup server, with 8*2TB disks won't boot anymore. Two disks failed at the same time and i rebuilt the raid 6 array with no problem, but now i can't boot the os. I'm using ubuntu server, 10.10. I've made screens of the displays to don't…
cedivad
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How can I use mdadm to assemble and mount two raid 0 drives?

Please excuse my ultra newbie questions. I have a problem with two RAID 0 hard drives from a WD My Book which has failed. The drives have the ext3 file system and are Linux raid autodetect type. Here are the questions: Does the mkdir /media/testing…
user68697
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RAID 10, how layout works?

Possible Duplicate: Can someone explain the physical architecture of RAID 10 in complete layman's terms? I'm trying to figure out how exactly works the RAID 10 in linux with mdadm. I want to create a RAID 10 out of 4 partitions, let's say a, b, c…
Bastien974
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Accessing a broken mdadm raid

I used a western digital mybookworld (SOHO NAS storage using Linux) as backup for my Linux box. Suddenly, the mybookworld does not boot up any more. So I opened the box, removed the hard disk and put the hard disk into an external USB HDD case, and…
CarstenCarsten
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Linux Raid: Can mdadm --grow a raid1 while mounted?

I have 2 500gb drives in a RAID1 setup that I needed to upgrade for more space. I mdadm --fail'ed each drive in turn and I used dd to copy each drive to it's respective larger drive (2tb each), removed the smaller drives and replaced them with the…
Chris
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Linux: create software RAID 1 from partition with data

I have a partition /dev/sdb2 formatted as fd and that is mounted as /var. I need to make this partition ready to raid 1 ( for this example /dev/md1 ). I still don't have the second HD, but want to prepare it in a way that when the HD arrives, it's…
Fernando
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mdadm RAID 5 array stopped mounting

I added a 2TB drive to my system (NOT to my RAID 5 array, just an additional single drive), and now the array won't mount - I get a "mount: /dev/md0 already mounted or /media/storage busy" error. Everything's worked fine for 2 years. All I did was…
Fred Hamilton
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mdadm lvm and ext4 slowness - How can I speed it up?

I can't figure out why I'm getting such terrible times out of my mdadm and in particular the lvm partitions in it. I made the raid: mdadm --create --verbose /dev/md0 --level=5 --chunk=1024 --raid-devices=4 /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1 #…
beatbreaker
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restore raid5 array after accidental reinitializing

is it possible to restore a raid 5 array, previously created using mdadm, after an accidental "--create" command instead of "--assemble" (the goal was to move the array after a system format) configuration: raid 5 array using 3 hard drives, each…
3a2roub
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upgrading ubuntu with mdadm raid

My Situation: I have a file server running ubuntu 8.04, and would like to upgrade it to 10.04 by removing the current drive that contains the OS, and putting in a clean drive and installing to that. The OS-Drive is the only PATA/IDE drive in the…
jsnfwlr
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