OpenWRT and Bare Metal BackUps: Difference between revisions

Line 188:

===Other Notes===

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

====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

*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)

**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

**...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)

*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)

**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')

**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 (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 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

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

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

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

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

***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)

***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)

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

***

*Steps for Creating an LVM "Partition" (IE, leave the MBR, "MBR Gap", and /boot Partitions intact.

**...same as above, but instead of referring to an entire drive (/dev/sda), refer to a partition (/dev/sda1)

====GRUB====

@@ Line 188: / Line 188: @@
 ===Other Notes===
-==== LVM (Logical Volume Management) -- Rough Draft ====
+====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
+*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)
+**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
+**...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)
+*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)
+**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')
+**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 (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 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
+***lvcreate -L 16G -n ROOT VG1
-** Mount (...but Format first) the Volume Group(s)
+**Mount (...but Format first) the Volume Group(s)
-*** LVDISPLAY (shows the available LVs in /dev/NameOfVolumeGroup/NameOfLogicalVolume)
+***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)
+***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)
+***mnt /dev/VG1/BOOT /mnt/BOOT (mkdir /mnt/BOOT first)
-***
+*Steps for Creating an LVM "Partition" (IE, leave the MBR, "MBR Gap", and /boot Partitions intact.
+**...same as above, but instead of referring to an entire drive (/dev/sda), refer to a partition (/dev/sda1)
 ====GRUB====