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Tejas
Titel: Live System Persistence  BeitragVerfasst am: 21.05.2011, 02:25 Uhr



Anmeldung: 09. Mai 2011
Beiträge: 74

Live System Persistence

eco2geek hat folgendes geschrieben::
This would be a good time to link to the Debian Live wiki on how to add a "persistent home" to your "poor man's installation".
Well, it's all there in 'man:/live-boot' Winken , if only one knew which manual to look in Böse

eco2geek hat folgendes geschrieben::
Tejas hat folgendes geschrieben::
Seems to me to be more flexible to have a file which one can move around, rather than to be bound to a particular partition.

Why? Are you planning on moving around the 1.1 GB squashfs file between partitions, too? Geschockt
Actually my just over a year old off-the-shelf 250GB system is beginning to look a bit small when one looks at the 1000 GB off-the-shelf systems coming on offer in the local supermarkets:!: Coming from an 8GB system in danger of cluttering up the disk with unwanted partitions Weinen

eco2geek hat folgendes geschrieben::
Seriously, those instructions say the "live-rw" file just has to be at the root of a partition that can be found and read. It's not tied to any particular partition.
Which brings me on to the next puzzling thing ...

# Create an empty ramdisk image
Code:
$ dd if=/dev/null of=live-rw bs=1G seek=1 # for a 1GB sized image file
Zitat:
Are you planning on moving around the 1.1 GB squashfs file between partitions, too? Geschockt
How come you know this results in a 1.1 GB file?

Code:
$ sudo mount /dev/sda5 px2
$ dd if=/dev/null of=px2/live-rw bs=1G seek=1
dd: memory exhausted
Maybe partition without iso file
Code:
$ dd if=/dev/null of=p8/live-rw bs=1G seek=1
dd: memory exhausted

Looks like it"s trying to create a 1 GB buffer, but have just under 1 GB ram., so maybe 1 MB buffer will succeed. at second best
Code:
$ dd if=/dev/null of=px2/live-rw bs=1M seek=1024
0+0 records in
0+0 records out
0 bytes (0 B) copied, 2.9091e-05 s, 0.0 kB/s

Resulting stats
Code:

$ ls -l px2
drwxr-xr-x 2 root root 4096 May 19 13:04 hx
drwxr-xr-x 2 kanotix kanotix 4096 May 19 00:15 kx
-rw-r--r-- 1 kanotix kanotix 1073741824 May 19 19:13 live-rw
drwx------ 2 root root 16384 May 18 22:29 lost+found
$ df -h px2
Filesystem Size Used Avail Use% Mounted on
/dev/sda5 4.0G 2.4G 1.5G 63% /home/kanotix/px2
Which do not tally
Code:
$ ls -l px2/hx
-rw-r--r-- 1 kanotix kanotix 1131413504 May 8 01:58 kanotix-2.6.38rc6.iso
$ ls -l px2/kx
-r--r--r-- 1 kanotix kanotix 20229456 May 11 15:17 initrd.img
-rw-r--r-- 1 kanotix kanotix 1319108608 May 18 17:58 kanotix-2.6.38.iso
-r--r--r-- 1 kanotix kanotix 4534736 May 11 15:17 vmlinuz
as sum of all files should exceed 3 GB,

# Make ext2 mountable file system
Code:
$ /sbin/mkfs.ext2 -F px2/live-rw
mke2fs 1.41.12 (17-May-2010)
OS type: Linux
Block size=4096 (log=2)
65536 inodes, 262144 blocks
13107 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=268435456
8 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376
Writing inode tables: done
Writing superblocks and filesystem accounting information: done
but seems to have gone through OK Geschockt:So, all I can assume is that this 'dd' creates a file for which space is not allocated, but which grows dynamically up to the max 1 GB.

Question: should I wish to move this file to another partition do I use 'mv' or 'dd'?Frage

& to be compleat.
 
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