Changes between Version 1 and Version 2 of Snailix

Timestamp:

11/13/21 11:17:42 (3 years ago)

Author:

admin

Comment:

--

Snailix

@@ -4 +4 @@
 Detail see [https://wiki.gentoo.org/wiki/LVM]
 
+=== Basic Discs ===
+two 1TB disks. Partition layout will be gpt with 3 partitions (BIOS boot 2M, EFI system, Linux LVM).
+LVM will be RAID1.
+Disks are sdd and sde
+
+==== Partitioning: ==== 
+{{{
+fdisk /dev/sdd
+g
+n default +2M
+t 1 4
+n default +128M
+t 2 1
+n default default
+t 3 30
+w
+p
+}}}
+Result:
+{{{
+Festplatte /dev/sdd: 931,51 GiB, 1000204886016 Bytes, 1953525168 Sektoren
+Festplattenmodell: Samsung SSD 870 
+Einheiten: Sektoren von 1 * 512 = 512 Bytes
+Sektorgröße (logisch/physikalisch): 512 Bytes / 512 Bytes
+E/A-Größe (minimal/optimal): 512 Bytes / 512 Bytes
+Festplattenbezeichnungstyp: gpt
+Festplattenbezeichner: EA219CEB-45F9-C34C-8C6B-A3F491EA8B88
+
+Gerät      Anfang       Ende   Sektoren  Größe Typ
+/dev/sdd1    2048       6143       4096     2M BIOS boot
+/dev/sdd2    6144     268287     262144   128M EFI-System
+/dev/sdd3  268288 1953525134 1953256847 931,4G Linux LVM
+}}}
+repeat for second disk /dev/sde
+
+==== LVM: ==== 
+===== Physical volumes =====
+{{{
+pvcreate /dev/sd[de]3
+}}}
+Result in **dvdisplay**
+{{{
+  --- Physical volume ---
+  PV Name               /dev/sdd3
+  VG Name               vg01
+  PV Size               <931,39 GiB / not usable 2,69 MiB
+  Allocatable           yes 
+  PE Size               4,00 MiB
+  Total PE              238434
+  Free PE               172897
+  Allocated PE          65537
+  PV UUID               9KCwX5-KuDX-de30-J0ke-9822-ljkX-wj3jKr
+   
+  --- Physical volume ---
+  PV Name               /dev/sde3
+  VG Name               vg01
+  PV Size               <931,39 GiB / not usable 2,69 MiB
+  Allocatable           yes 
+  PE Size               4,00 MiB
+  Total PE              238434
+  Free PE               172897
+  Allocated PE          65537
+  PV UUID               N4TuOc-Dq6A-ZwVW-61t7-gfME-pSFu-Q9Iwty
+}}}
+===== Volume group =====
+{{{
+vgcreate vg01 /dev/sd[de]3
+}}}
+Result in **vgdisplay**
+{{{
+  --- Volume group ---
+  VG Name               vg01
+  System ID             
+  Format                lvm2
+  Metadata Areas        2
+  Metadata Sequence No  4
+  VG Access             read/write
+  VG Status             resizable
+  MAX LV                0
+  Cur LV                1
+  Open LV               1
+  Max PV                0
+  Cur PV                2
+  Act PV                2
+  VG Size               <1,82 TiB
+  PE Size               4,00 MiB
+  Total PE              476868
+  Alloc PE / Size       131074 / <512,01 GiB
+  Free  PE / Size       345794 / <1,32 TiB
+  VG UUID               i1M7O9-dbOQ-azV4-ajmF-utwq-cKaj-RhBROV
+}}}
+===== Logical Volumes =====
+====== for root ======
+{{{
+lvcreate --mirrors 1 --type raid1 -L 256G -n root vg01
+}}}
+Result in **lvdisplay**
+{{{
+  --- Logical volume ---
+  LV Path                /dev/vg01/root
+  LV Name                root
+  VG Name                vg01
+  LV UUID                N95R5k-dFV6-VecO-j2yQ-nQ12-xjwC-eyjnZ9
+  LV Write Access        read/write
+  LV Creation host, time snailix, 2021-11-11 23:58:06 +0100
+  LV Status              available
+  # open                 1
+  LV Size                256,00 GiB
+  Current LE             65536
+  Mirrored volumes       2
+  Segments               1
+  Allocation             inherit
+  Read ahead sectors     auto
+  - currently set to     256
+  Block device           252:4
+}}}
+
+=== block ids ===
+==== root ====
+{{{
+blkid | grep vg01-root
+}}}
+{{{
+/dev/mapper/vg01-root_rimage_0: UUID="06a2c8e7-dc77-49db-8e72-c7d0fa9ebe77" BLOCK_SIZE="4096" TYPE="ext4"
+/dev/mapper/vg01-root: UUID="06a2c8e7-dc77-49db-8e72-c7d0fa9ebe77" BLOCK_SIZE="4096" TYPE="ext4"
+/dev/mapper/vg01-root_rimage_1: UUID="06a2c8e7-dc77-49db-8e72-c7d0fa9ebe77" BLOCK_SIZE="4096" TYPE="ext4"
+}}}
+==== boot ====
+{{{
+blkid | grep sdd2
+}}}
+{{{
+/dev/sdd2: UUID="bfb2c0c7-e7bf-44d3-b8c9-1cd60ace50a4" BLOCK_SIZE="1024" TYPE="ext2" PARTUUID="e7666b15-77f8-2942-806b-6f5a198fa496"
+}}}
+
+=== copy root from old installation ===
+Boot from USB and mount the old and the new root. mount using UUID to be sure to mount the right devices.
+{{{
+mkdir /mnt/root-old
+mkdir /mnt/root-new
+mount UUID="fcafeec5-6c23-4edd-acf3-dfab41ae7776" /mnt/root-old
+mount UUID="06a2c8e7-dc77-49db-8e72-c7d0fa9ebe77" /mnt/root-new
+rsync -aHv --progress --delete /mnt/root-old/ /mnt/root-new/
+
+=== fstab ===
+edit fstab to reflect the UUIDs
+{{{
+UUID="bfb2c0c7-e7bf-44d3-b8c9-1cd60ace50a4"     /boot           ext2            noauto,noatime          1 2
+UUID="06a2c8e7-dc77-49db-8e72-c7d0fa9ebe77"     /               ext4            noatime                 0 1
+...
+}}}
+
+=== initramfs ===
+mount sdd2 on boot (using UUID to be sure that it is the correct one)
+{{{
+umount /boot
+mount UUID="bfb2c0c7-e7bf-44d3-b8c9-1cd60ace50a4" /boot
+}}}
+generate initrd (wiht lvm busybox luks support)
+{{{
+genkernel --lvm --busybox --luks --install initramfs
+}}}
+
 === grub2 ===
+Grub2 installation. using gpt layout but no UEFI.
+==== Install ====
+{{{
+grub-install /dev/sdd
+grub-install /dev/sde
+}}}
+==== Default ====
 in /etc/default/grub
-
-{{{
-GRUB_CMDLINE_LINUX="dolvm rootfstype=ext4 init=/usr/lib/systemd/systemd"
-}}}
-
+{{{
+GRUB_CMDLINE_LINUX="dolvm root=UUID=06a2c8e7-dc77-49db-8e72-c7d0fa9ebe77 rootfstype=ext4 vga=0x31B init=/usr/lib/systemd/systemd"
+}}}
+==== Config ====
+{{{
+grub-mkconfig -o /boot/grub/grub.cfg
+}}}
+**Remark:** for me during runtime the disks are sdd (hd3) and sde (hd4) but during boot they are sda (hd0) and sdb (hd1) because the devices on the hardware controller are moved to sda, ...
+Therfore I have to change the hd-entries in /boot/grub/grub.cfg using
+{{{
+sed -i 's/hd3/hd0/g' /boot/grub/grub.cfg
+}}}
+==== Sync boot over discs ====
+to be able to boot from another disk (I have 3 disk that have a grub2 installation) I use the following script. (create mountpoints in /mnt accordingly). And this relies on a correct entry for boot in fstab)
+{{{
+echo 'mount boot'
+mount /boot
+echo 'mount sda1'
+mount /dev/sda1 /mnt/sda1
+echo 'mount sde2'
+mount /dev/sde2 /mnt/sde2
+echo 'sync to sda1'
+rsync -aHv --progress --delete /boot/ /mnt/sda1/
+echo 'sync to sde2'
+rsync -aHv --progress --delete /boot/ /mnt/sde2/
+echo 'umount sde2'
+umount /mnt/sde2
+echo 'umount sda1'
+umount /mnt/sda1
+echo 'umount boot'
+umount boot
+echo 'done'
+}}}