Re: [arch-general] BTRFS USB key fails to boot

31 Jul 2012


      well, I can format to ext4, but it would actually kill my sd
On Jul 31, 2012 11:15 AM, "Leonidas Spyropoulos" 
wrote:
...
On 31 Jul 2012 01:49, "Δημήτρης Ζέρβας" <01ttouch@gmail.com> wrote:
...
yaffs2 would be faster than ext2?
On Jul 31, 2012 3:21 AM, "Δημήτρης Ζέρβας" <01ttouch@gmail.com> wrote:
...
hm... I curently use ext2 and I have installation in a partition of my
sd
...
...
card. wich fs would be better than ext2, given that I need quich r/w
but as
less writes as possible?
Usually you are limited by hardware not by the file system.
...
...
On Jul 31, 2012 3:18 AM, "Leonardo Dagnino" 
wrote:
...
Well, I don't think it will "destroy" the flash... As it is made of
NAND
flash, I suppose that it reacts pretty much like an SSD. Anyway, it
should
take a considerable time until it wears out, and if you use it only to
install an OS, it won't have any writes, what means that it shouldn't
wear
out for some years (or at least I hope so)
For what I remember, btrfs uses a pretty big amount of space, what
means
more writes.
Leonardo Dagnino
Obs.: NAND flash only has a limited amount of erases/writes, not
reads.
2012/7/30 Zhengyu Xu 
...
I've no idea on how btrfs performs with a flash disk actually. My
btrfs
partition just locates on a normal hdd so I have never thought about
it
:-)
Regards,
Zhengyu Xu
On 2012-7-31, at 8:27, Δημήτρης Ζέρβας<01ttouch@gmail.com> wrote:
...
is it actually safe to format an usb flash to btrfs? won't it
destroy
the
flash because of the read/writes?
On Jul 31, 2012 2:20 AM, "Zhengyu Xu"  wrote:
> On Mon, 2012-07-30 at 17:36 -0400, Kyle wrote:
>> Trying to install Arch on a USB key, I am having trouble getting
a
> bootable system. I created a basic BTRFS filesystem and mounted
it
with
SSD
> optimizations and compression. I didn't create any subvolumes or
anything
> else that is said to be problematic when booting to a BTRFS
filesystem.
> From that point, I followed the installation guide for a normal
install.
> However, after reading the documentation for GRUB and Syslinux,
my
newly
> created install doesn't boot. I looked at the wiki entry for
installing
to
> a USB key, but it is still written for AIF and grub-legacy.
However,
the
> main difference I can find doesn't seem to apply, because
although it
> mentions that the USB key where grub-legacy is installed is
always
hd0,0,
> grub2 is supposed to look for the UUID of the disk, which matches
correctly
> in /boot/grub/grub.cfg. I also tried setting up this install to
boot
using
> Syslinux, but both bootloaders just drop me into some kind of
shell
and
> refuse to boot. Unfortunately, since I am
>> visually impaired and use speech to install and use Arch, I am
unable
to
> see whether I am in a "normal shell" or a rescue shell, or even
what
kind
> of issue the bootloaders are having that keeps them from finding
a
kernel.
> Should I be using a different filesystem other than BTRFS, even
though
both
> bootloaders are said to support it? Should I not be using
compression
on my
> filesystem? Could this be a problem that is entirely unrelated to
the
> filesystem I'm using? Any help is greatly appreciated.
>> ~Kyle
>
> Did you add usb and btrfs to the hooks array in your
mkinitcpio.conf?
>
> Regards,
> Zhengyu Xu
>
>
>