Raid
將 root 從 lvm2 轉換為 lvm2+raid1 (lvconvert –type raid1) 後出現“LV 狀態不可用”
我剛剛通過 lvm2 根文件系統從線性 lvm2(單個 HDD:sda)轉換為 lvm2 raid1(使用
lvconvert -m1 --type raid1 /dev/ubuntu/root /dev/sdb5
命令)。但是在此轉換之後,我無法啟動我的 ubuntu 12.10(核心 3.5.0-17-generic)。Initramfs 說它在 /dev/mapper 中找不到 root fs:
Begin: Running /scripts/init-premount ... done. Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done. ... (kernel messages) Gave up waiting for root device. Common problems: - Boot args (cat /proc/cmdline) - Check rootdelay= (did the system wait long enough?) - Check root= (did the system wait for the right device?) - Missing modules (cat /proc/modules; ls /dev) ALERT! /dev/mapper/ubuntu-root does not exist. Dropping to a shell!
有我的模組和命令行列表:
(initramfs) cat /proc/modules hid_generic usbhid hid e1000 raid10 raid456 async_pq async_xor xor async_memcpy async_raid6_recov raid6_pq async_tx raid1 raid0 multipath linear (initramfs) cat /proc/cmdline BOOT_IMAGE=/vmlinux-3.5.0-17-generic root=/dev/mapper/ubuntu-root ro (initramfs) ls /dev/mapper control ubuntu-swap_1
實用程序的輸出
lvm
表明根 LV 處於非活動狀態/不可用:lvm> pvscan PV /dev/sda5 VG ubuntu lvm2 [ 13.76 GiB / 408.00 MiB free] PV /dev/sdb5 VG ubuntu lvm2 [ 13.76 GiB / 508.00 MiB free] lvm> vgscan Reading all physical volumes. This may take a while... Found volume group "ubuntu" using metadata type lvm2 lvm> lvscan inactive '/dev/ubuntu/root' [13.26 GiB] inherit ACTIVE '/dev/ubuntu/swap_1' [100.00 MiB] inherit lvm> lvdisplay ubuntu --- Logical volume --- LV Path /dev/ubuntu/root LV Name root VG Name ubuntu LV UUID xxxxxxxxxxxxxxx LV Write Access read/write LV Creation host, time ubuntu, 2013-05-07 LV Status NOT available <<<<< !!!! LV Size 13.26 GB Current LE 3394 Mirrored volumes 2 Segments 1 Allocation inherit Read ahead sectors auto
在我
lvchange -ay ubuntu
的情況下,從 initrd 失敗:lvm> lvchange -ay ubuntu /sbin/modprobe failed: 1 Can't process LV root: raid1 target support missing from kernel?
我的 initrd 中缺少哪個模組?現在我從這個核心中收集了完整的模組,並且可以嘗試任何模組。
你需要這個:
modprobe dm_raid
{pv,vg,lv}scan
查看磁碟並查看那裡的LV。但是由於核心無法以配置的方式提供對它們的訪問,因此它們無法訪問。