Hi,
I want to create a large ramdisk - 1GB
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_COUNT=1
CONFIG_BLK_DEV_RAM_SIZE=4096
CONFIG_BLK_DEV_RAM_BLOCKSIZE=1024
kernel comman line: ramdisk_size=1000000
$ LANG="c" sudo /sbin/mkfs.ext2 /dev/ram0
mke2fs 1.39 (29-May-2006)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
125184 inodes, 250000 blocks
12500 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=260046848
8 block groups
32768 blocks per group, 32768 fragments per group
15648 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376
Writing inode tables: done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 22 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
$ LANG="c" sudo mount /dev/ram0 /mnt/ram0/
mount: wrong fs type, bad option, bad superblock on /dev/ram0,
missing codepage or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
$ LANG="c" sudo /sbin/tune2fs -l /dev/ram0
tune2fs 1.39 (29-May-2006)
/sbin/tune2fs: Bad magic number in super-block while trying to open /dev/ram0
Couldn't find valid filesystem superblock.
dmesg
EXT2-fs: Magic mismatch, very weird !
VFS: Can't find an ext2 filesystem on dev ram0.
With ramdisk_size=500000 everything is ok.
machine
CPU P4 (ia32)
2 GB RAM
Is this is a hardware (arch) or software limitation? Maybe a bug?
Regards,
Michal
--
Michal K. K. Piotrowski
LTG - Linux Testers Group
(http://www.stardust.webpages.pl/ltg/)
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