最後更新: 2019-03-06

Personalize 目的

* make your own system and data recovery disk
* add your own scripts to make the recovery procedure automatic
* combining the restoration and backups software

方式

• backstore
• 修改 boot options
• sysrcd.dat

 

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Create and use a backing store (sysrcd.bs)

 

A backing-store is not mandatory and if the scan fails, it will store the files which have changed in memory.

To disable the disks scan at boot time specify backstore=off on the boot command line.

If you want to save your backing-store file on a harddisk, boot with backstore=alldev to scan all devices (not just removable devices).

* default location for a backing-stores file is any file named sysrcd.bs located at the root of a disk

Create sysrcd.bs

boot SystemRescueCd with option “backstore=off”

mkdir /mnt/backstore

mount -o rw /dev/sdaX /mnt/backstore

# mega-bytes

sysresccd-backstore create /mnt/backstore/sysrcd.bs 256

dd if=/dev/zero of=/mnt/backup/sysrcd.bs bs=1024k count=256
mke2fs -j -F -b 1024 /mnt/backstore/sysrcd.bs

# when sysresccd starts again, it should automatically mount the backing-store and

# use it you can check that the backing-store file is mounted on /mnt/memory

reboot

 

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簡易自制 ( 只修改 boot options )

 

1. 用 sysresccd

2. mount 起 CD 自身

mount /dev/sr0 /mnt/cd

3. 解開 CD 資料的地方, 最少要有 CD 自身的 size X 2 的空間

mount /dev/sdaN /mnt/custom        

mkdir /mnt/custom/isoroot

cp -a /mnt/cd/* /mnt/custom/isoroot

cd /mnt/custom/isoroot

# 用 sysresccd-custom 自定

sysresccd-custom setkmap en

/mnt/custom is mounted -> ok
Keymap to be loaded: en

# 自定 boot options

isoroot/isolinux/isolinux.cfg

# 修改 splash screen

isoroot/isolinux/f1boot.msg

# 建立 ISO

sysresccd-custom isogen my_srcd

 

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Add files to the compressed image file(sysrcd.dat)

 

OS: Gentoo

sysrcd.dat <-- squashfs filesystem

1. 建立環境

mkdir /mnt/custom

mount /dev/sdaN /mnt/custom

* sdaN must linux partition

2. Extract sysrcd.dat

* At least 1.5 GB & take over 15 minutes)

* Default 係 extract 去 /mnt/custom

/usr/sbin/sysresccd-custom extract

* 建立了

• /mnt/custom/customcd/files         1.5G   (syscd.dat 的內容)
• /mnt/custom/customcd/isoroot     125M

3. Chroot in the sysresccd environment

mkdir -p /mnt/custom/customcd/files/proc

mkdir -p /mnt/custom/customcd/files/dev

mkdir -p /mnt/custom/customcd/files/sys

mount -o bind /proc /mnt/custom/customcd/files/proc

mount -o bind /dev /mnt/custom/customcd/files/dev

mount -o bind /sys /mnt/custom/customcd/files/sys

chroot /mnt/custom/customcd/files /bin/bash

4. Customize

...................

5. Create the new squashfs image

/usr/sbin/sysresccd-custom squashfs

* 建立了: /mnt/custom/customcd/isoroot/sysrcd.dat

6. Add files to the ISO image

cp -a my-files /mnt/custom/customcd/isoroot

7. Last: Create the new ISO image

# my_srcd = volume name for the CDRom

sysresccd-custom isogen my_srcd

* The new ISO image is:

/mnt/custom/customcd/isofile/sysresccd-ccyymmdd-hhmm.iso

output

/mnt/custom is mounted -> ok
there is enough estimated free space here (5134 MB) -> ok
Volume name of the CDRom: my_srcd
xorriso 1.3.8 : RockRidge filesystem manipulator, libburnia project.

Drive current: -outdev 'stdio:/mnt/custom/customcd/isofile/sysresccd-20190226-0505.iso'
Media current: stdio file, overwriteable
Media status : is blank
Media summary: 0 sessions, 0 data blocks, 0 data, 5133m free
xorriso : WARNING : -volid text does not comply to ISO 9660 / ECMA 119 rules
Added to ISO image: directory '/'='/mnt/custom/customcd/isoroot'
xorriso : UPDATE : 363 files added in 1 seconds
xorriso : UPDATE : 363 files added in 1 seconds
xorriso : UPDATE :  9.99% done
xorriso : UPDATE :  51.63% done
xorriso : UPDATE :  91.70% done
ISO image produced: 63663 sectors
Written to medium : 63663 sectors at LBA 0
Writing to 'stdio:/mnt/custom/customcd/isofile/sysresccd-20190226-0505.iso' completed successfully.

xorriso -as mkisofs -joliet -rock -omit-version-number -disable-deep-relocation \
        -b isolinux/isolinux.bin -c isolinux/boot.cat \
        -no-emul-boot -boot-load-size 4 -boot-info-table \
        -eltorito-alt-boot -e boot/grub/efi.img -no-emul-boot \
        -o /mnt/custom/customcd/isofile/sysresccd-20190226-0505.iso \
        -volid my_srcd /mnt/custom/customcd/isoroot --> 0
Final ISO image: /mnt/custom/customcd/isofile/sysresccd-20190226-0505.iso

 

 

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