Eli Schwartz via arch-general <arch-general@archlinux.org> 于2019年11月6日周三 上午9:41写道：
On 11/5/19 8:35 PM, Hongyi Zhao via arch-general wrote:
Hi,
I try to use a specific partition of usb to install archlinux, the following is the step:
Suppose the /dev/sdc is my usb:
$ sudo ddrescue -f archlinux-2019.11.01-x86_64.iso /dev/sdc2 The ISO contains multiple partitions, so probably not.
Why when using the whole usb disk, the problem will disappear?
Why are you trying to do this, precisely?
I want to use a usb disk for installation of multiple distros, say, Debian, Ubuntu, Arch, and so on. In this case, I must not using the whole usb disk for only one iso, and on the other hand, using whole usb disk for only one iso, is wasting of the usb's space, considering that we cannot use it for doing other things. Furthermore, I noticed that the dd-based method is more robust than using the iso directly with grub's loopback module. To say the least, for the Debian iso, the dd-based method can do the trick while the loopback method will fail to detect the cd-rom during the installation progress.
Maybe you want to install archlinux following the install guide, but installing to the USB partition instead of an HDD. For example,
https://wiki.archlinux.org/index.php/Installing_Arch_Linux_on_a_USB_key
This is not the aim that I want to achieve.
Alternatively, you can use grub to boot an ISO *file* as a loopback device. Some people do this to create multiboot USBs.
As I said above, this method is not so robust as the dd-based method. In detail, the most robust method for using the usb disk to installation a unix/linux OS, should be the dd-based method which using the whole usb disk. But this method has the shortcoming that it will occupy the whole usb disk with only a small iso image and prohibit us for using the usb disk to do other things at the same time.
-- Eli Schwartz Bug Wrangler and Trusted User
-- Hongsheng Zhao <hongyi.zhao@gmail.com> Institute of Semiconductors, Chinese Academy of Sciences GnuPG DSA: 0xD108493