space saving hard disk dump using dd
Fill you enpty space witn zeros. dd if=/dev/zero of=/zero.txt rm -f /zero.txt Then dd your device: dd if=/dev/sdX of=mydisk.img conv=spars bs=512
Tag: disk
kvm | qemu | qcow2 dynamic/sparse disk allocation problem | shrink sparse qcow2 disks howto
In some recent qemu versions there is a problem while creating sparse disks using the virt-manager. Normally the qcow2 format always allocates space dynamically (sparse), but some qemu versions fail at this, they create disks with full expected size. Solution: Create your disks manually: Shrinking existing images: # mv disk.qcow2 disk.qcow2.orig # qemu-img convert -O […]
Label USB drive containing ext2 ext3 ext4
e2label /dev/xxx LABEL
OpenBSD 5.5 and later | cloning a disk the easy way
ATTENTION! Your default kernel always uses the root device per default from which he origins. This is hardcoded. You can change this at boot time using the boot -a (man boot) command at the boot prompt. It is NOT possible to script this (even using the /etc/boot.conf). This is not really a problem, if your […]
OpenBSD 5.1 and earlier | Cloning a disk the easy way
#!/bin/sh DISKLABEL=$(which disklabel) FDISK=$(which fdisk) DUMP=$(which dump) RESTORE=$(which restore) NEWFS=$(which newfs) MOUNT=$(which mount) UMOUNT=$(which umount) DUMP=$(which dump) RESTORE=$(which restore) MNT=”/mnt” LABEL=”/tmp/label” if [ $# -lt 2 ]; then echo “usage: do_clone.sh FROM TO” echo “example: do_clone.sh wd0 wd1” exit fi SRC=$1 $DISKLABEL $SRC > /dev/null || exit TAR=$2 $DISKLABEL $TAR > /dev/null || exit #echo […]
OpenBSD 5.2 and later | cloning a disk the easy way
ATTENTION! Your default kernel always uses the root device per default from which he origins. This is hardcoded. You can change this at boot time using the boot -a (man boot) command at the boot prompt. It is NOT possible to script this (even using the /etc/boot.conf). This is not really a problem, cs if […]
bytes and bones 