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Added backup by serial method documentation (#7932)
docs: create disk/partition sector backup by disk serial number
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@ -8,6 +8,41 @@ Backing up disk images can still be efficient with Borg because its `deduplicati
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technique makes sure only the modified parts of the file are stored. Borg also has
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optional simple sparse file support for extract.
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It is of utmost importancy to pin down the disk you want to backup.
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You need to use the SERIAL for that.
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Use:
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.. code-block:: bash
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# You can find the short disk serial by:
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# udevadm info --query=property --name=nvme1n1 | grep ID_SERIAL_SHORT | cut -d '=' -f 2
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DISK_SERIAL="7VS0224F"
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DISK_ID=$(readlink -f /dev/disk/by-id/*"${DISK_SERIAL}") # Returns /dev/nvme1n1
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mapfile -t PARTITIONS < <(lsblk -o NAME,TYPE -p -n -l "$DISK_ID" | awk '$2 == "part" {print $1}')
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echo "Partitions of $DISK_ID:"
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echo "${PARTITIONS[@]}"
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echo "Disk Identifier: $DISK_ID"
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# Use the following line to perform a borg backup for the full disk:
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# borg create --read-special /path/to/repo::{now} "$DISK_ID"
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# Use the following to perform a borg backup for all partitions of the disk
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# borg create --read-special /path/to/repo::{now} "${PARTITIONS[@]}"
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# Example output:
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# Partitions of /dev/nvme1n1:
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# /dev/nvme1n1p1
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# /dev/nvme1n1p2
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# /dev/nvme1n1p3
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# Disk Identifier: /dev/nvme1n1
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# borg create --read-special /path/to/repo::{now} /dev/nvme1n1
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# borg create --read-special /path/to/repo::{now} /dev/nvme1n1p1 /dev/nvme1n1p2 /dev/nvme1n1p3
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Decreasing the size of image backups
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------------------------------------
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@ -116,4 +151,4 @@ way to create application-consistent backups.
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Borg doesn't intend to address these issues due to their huge complexity and
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platform/software dependency. Combining Borg with the mechanisms provided by the platform
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(snapshots, hypervisor features) will be the best approach to start tackling them.
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(snapshots, hypervisor features) will be the best approach to start tackling them.
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