![]() I uncommented the udev_log = info line in /etc/udev/nf but can't see anything new. If anyone knows how to get some traces from udev, it would be great. ![]() I tried dpkg-reconfigure mdadm : nothing new. Would that be because the raid1 module seems to be loaded after udev events are generated ? Here's the according log : avril 15 12:23:21 tinas mdadm-raid: Generating udev events for MD arrays.done.Īvril 15 12:23:22 tinas systemd-modules-load: Inserted module 'raid1'Īvril 15 12:23:22 tinas kernel: md: raid1 personality registered for level 1īut the array is still not assembled: cat /proc/mdstat Unused devices: I added the raid1 module to /etc/modules, issued an update-initramfs -u. I just realized that right after boot the raid1 module isn't loaded ! cat /proc/mdstat Here, I'm not sure if the type value is correct 'Linux RAID' as I've read that 0xFD is expected but that value doesn't seem available through fdisk with GPT partition table.įrom journalctl -xb I can find one trace : Apr 14 15:14:46 tinas mdadm-raid: Generating udev events for MD arrays.done.Īpr 14 15:35:03 tinas kernel: md: md0 stopped.Īpr 14 15:35:03 tinas kernel: md: bindĪpr 14 15:35:04 tinas kernel: md: raid1 personality registered for level 1Īpr 14 15:35:04 tinas kernel: md/raid1:md0: active with 2 out of 2 mirrorsĪpr 14 15:35:04 tinas kernel: created bitmap (15 pages) for device md0Īpr 14 15:35:04 tinas kernel: md0: bitmap initialized from disk: read 1 pages, set 0 of 29807 bitsĪpr 14 15:35:04 tinas kernel: md0: detected capacity change from 0 to 2000263643136Īpr 14 15:35:04 tinas kernel: md0: unknown partition tableĪpr 14 15:35:04 tinas kernel: BTRFS: device fsid b8a72591-040e-4ca1-a663-731a5dcbebc2 devid 1 transid 8 /dev/md0 Taille d'E/S (minimale / optimale) : 4096 octets / 4096 octets Taille de secteur (logique / physique) : 512 octets / 4096 octets Md0 : active (auto-read-only) raid1 sdc1 sdd1 When manually assembled, the array looks like this : cat /proc/mdstat Manually assembling it doesn't trigger any error. If that line in fstab is commented, then the boot process goes to the end BUT the RAID array isn't available. And thus, systemd falls back to some degraded shell after trying to mount the FS described in /etc/fstab. ![]() But it is not assembled automatically at boot time. I'm running Debian Jessie with a standard 3.16 kernel. Start the installation of Ubuntu, choose manual disk partitioning ().First, I prefer to mention I've found and read this. ![]() The following disk layout will be used: Software RAID -1ġ. Increased productivity of reading discs as this operation can be performed simultaneously on two discs. Should one of the disks fail, another one will perform its functions.Ģ. RAID-1 is a mirrored disk array, and the disks are complete copies of each other. In this case, we will set up software RAID of the first level, which will give the system disk resource two positive features:ġ. A special controller looks after the physical media, the OS works with a virtual combined disk space. A special OS driver looks after physical media, and the OS works with a virtual combined disk space.Ģ. There are two types of RAID implementation:ġ. RAID "Redundant Array of Independent Disks" is a method of using multiple disks for different combinations to increase the reliability of data storage and/or improve performance of read/write operations, depending on the RAID level. How to install Ubuntu with software RAID-1
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