Re: /dev/ram

[Cloudmaster <sauer@cloudmaster.com>]

On Mon, 16 Aug 1999, cloudmaster wrote:
...
> Try looking into man ramsize, that might be marginally helpful...  I'm not

you might also look at
  less /usr/src/linux/Documentation/ramdisk.txt
it's kinda helpful too, but not much.

Anyway, do you have ramdisk compiled in or inserted as a module?  Here's my
console while I played with it...  I thought it was neat that the files
stayed in it through a remount.  Removing then inserting the module cleared
the filesystem though.  I'm constantly amazed that my OS of choice actually
does things that make sense... :)

root@pyro:/home/sauer > cat /proc/modules
dummy0                   716   1 (autoclean)
root@pyro:/home/sauer > modprobe rd
root@pyro:/home/sauer > cat /proc/modules
rd                      1712   1
dummy0                   716   1 (autoclean)
root@pyro:/home/sauer > dd if=/dev/zero of=/dev/ram1 bs=1k count=2048
2048+0 records in
2048+0 records out
root@pyro:/home/sauer > mke2fs -m0 /dev/ram1 2048
mke2fs 1.12, 9-Jul-98 for EXT2 FS 0.5b, 95/08/09
Linux ext2 filesystem format
Filesystem label=
512 inodes, 2048 blocks
0 blocks (0.00%) reserved for the super user
First data block=1
Block size=1024 (log=0)
Fragment size=1024 (log=0)
1 block group
8192 blocks per group, 8192 fragments per group
512 inodes per group

Writing inode tables: done
Writing superblocks and filesystem accounting information: done
root@pyro:/home/sauer > mount /dev/ram1 /mnt/1
root@pyro:/home/sauer > df -h /mnt/1
Filesystem            Size  Used  Avail  Capacity Mounted on
/dev/ram1             1.9M   13K   1.9M      1%   /mnt/1
root@pyro:/home/sauer > echo > /mnt/1/test
root@pyro:/home/sauer > ls --color -l /mnt/1
total 13
drwxr-xr-x   2 root     root        12288 Aug 16 22:09 lost+found
-rw-r--r--   1 root     root            1 Aug 16 22:11 test
root@pyro:/home/sauer > umount /mnt/1
root@pyro:/home/sauer > mount /dev/ram1 /mnt/1
root@pyro:/home/sauer > ls --color -l /mnt/1
total 13
drwxr-xr-x   2 root     root        12288 Aug 16 22:09 lost+found
-rw-r--r--   1 root     root            1 Aug 16 22:11 test

--end--


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