Hi all,
Does anyone know is there any size limitation on ramdisk. If I try to
configure any ramdisk larger than 512MB, then I can not mount that ram
filesystem.
See Below, I have ramdisk=1200000 in my lilo.conf file,
Then I do:
[root@mx25 /]# mke2fs /dev/ram0
mke2fs 1.23, 15-Aug-2001 for EXT2 FS 0.5b, 95/08/09
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
150080 inodes, 300000 blocks
15000 blocks (5.00%) reserved for the super user
First data block=0
10 block groups
32768 blocks per group, 32768 fragments per group
15008 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912
Writing inode tables: done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 30 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
[root@mx25 /]# mount /dev/ram0 /test
mount: wrong fs type, bad option, bad superblock on /dev/ram0,
or too many mounted file systems
[root@mx25 /]# fsck /dev/ram0
Parallelizing fsck version 1.23 (15-Aug-2001)
e2fsck 1.23, 15-Aug-2001 for EXT2 FS 0.5b, 95/08/09
Couldn't find ext2 superblock, trying backup blocks...
fsck.ext2: Bad magic number in super-block while trying to open /dev/ram0
The superblock could not be read or does not describe a correct ext2
filesystem. If the device is valid and it really contains an ext2
filesystem (and not swap or ufs or something else), then the superblock
is corrupt, and you might try running e2fsck with an alternate superblock:
e2fsck -b 8193 <device>
[root@mx25 /]# e2fsck -b 229376 /dev/ram0
e2fsck 1.23, 15-Aug-2001 for EXT2 FS 0.5b, 95/08/09
e2fsck: Attempt to read block from filesystem resulted in short read while
trying to open /dev/ram0
Could this be a zero-length partition?
william wu
Sr.System Administrator
Brightmail, Inc
301 Howard Street #1800
San Francisco, CA 94105
415-365-6135 (work)
510-468-6819(Cell)
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