OpenWRT and Bare Metal BackUps: Difference between revisions

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===Other Notes===

==== LVM (Logical Volume Management) -- Rough Draft ====

Signature ([[wikipedia:Master_boot_record#Disk_identity|Disk Signature / Disk Identity]]): A [[wikipedia:Master_boot_record#DISK_ID|32 bit section]] of the MBR (GPT, DOS, LVM, etc). Oh, and CFDISK won't work as it does not facilitate LVM Disks.

* Steps for Creating a Bootable Disk with an LVM Partition

** Create a BOOT Partition at an offset of 1M (equivalent to a quantity 2048 sectors that are 512 Bytes / Sector)

** ...same steps as below, but for /dev/sdaX

* Steps for Creating an LVM Disk (NOTE: As in, that's an entire Disk, not just a Partition, and it assumes there's another disk to boot from, so do NOT do this, it is just here for reference)

** PVCREATE (Create a Physical Disk, sort of equivalent to writing a Disk Signature): pvcreate /dev/sda (this will / can overwrite the DOS or GPT signature / identity of a disk)

** VGCREATE (Create a Volume Group, nope, not sort of like creating a Partition (that's next), but rather like part B of PVCREATE, where one or more disks are assigned to a Volume Group): vgcreate VG1 /dev/sda (VG1 is an arbitrary name, it can be 'anything')

** LVCREATE (Create a Logical Volume, equivalent to Partitioning);

*** lvcreate -L 16M -n BOOT VG1 (16M is the size of the first "Partition", BOOT is just a name given to the Logical Volume, it can be anything, VG1 is the name of the Volume Group from the previous step)

*** lvcreate -L 16G -n ROOT VG1

** Mount (...but Format first) the Volume Group(s)

*** LVDISPLAY (shows the available LVs in /dev/NameOfVolumeGroup/NameOfLogicalVolume)

*** mkfs.ext4 -L BOOT /dev/VG1/BOOT -v (where -L BOOT is just the name of the Partition)

*** mnt /dev/VG1/BOOT /mnt/BOOT (mkdir /mnt/BOOT first)

***

====GRUB====

@@ Line 187: / Line 187: @@
 ===Other Notes===
+==== LVM (Logical Volume Management) -- Rough Draft ====
+Signature ([[wikipedia:Master_boot_record#Disk_identity|Disk Signature / Disk Identity]]): A [[wikipedia:Master_boot_record#DISK_ID|32 bit section]] of the MBR (GPT, DOS, LVM, etc).  Oh, and CFDISK won't work as it does not facilitate LVM Disks.
+* Steps for Creating a Bootable Disk with an LVM Partition
+** Create a BOOT Partition at an offset of 1M (equivalent to a quantity 2048 sectors that are 512 Bytes / Sector)
+** ...same steps as below, but for /dev/sdaX
+* Steps for Creating an LVM Disk (NOTE: As in, that's an entire Disk, not just a Partition, and it assumes there's another disk to boot from, so do NOT do this, it is just here for reference)
+** PVCREATE (Create a Physical Disk, sort of equivalent to writing a Disk Signature): pvcreate /dev/sda (this will / can overwrite the DOS or GPT signature / identity of a disk)
+** VGCREATE (Create a Volume Group, nope, not sort of like creating a Partition (that's next), but rather like part B of PVCREATE, where one or more disks are assigned to a Volume Group): vgcreate VG1 /dev/sda (VG1 is an arbitrary name, it can be 'anything')
+** LVCREATE (Create a Logical Volume, equivalent to Partitioning);
+*** lvcreate -L 16M -n BOOT VG1 (16M is the size of the first "Partition", BOOT is just a name given to the Logical Volume, it can be anything, VG1 is the name of the Volume Group from the previous step)
+*** lvcreate -L 16G -n ROOT VG1
+** Mount (...but Format first) the Volume Group(s)
+*** LVDISPLAY (shows the available LVs in /dev/NameOfVolumeGroup/NameOfLogicalVolume)
+*** mkfs.ext4 -L BOOT /dev/VG1/BOOT -v (where -L BOOT is just the name of the Partition)
+*** mnt /dev/VG1/BOOT /mnt/BOOT (mkdir /mnt/BOOT first)
+***
 ====GRUB====