Error while mounting a ramdisk file

guptaa4 · 12-20-2007, 07:08 AM

Hi,

I am trying to add an application to ramdisk.

As a first step i removed the 64 bit header.

bash$ dd if=uRamdisk bs=64 skip=1 of=ramdisk.gz
21876+1 records in
21876+1 records out

Next i uncompressed the ramdisk image.

bash$ gunzip -v ramdisk.gz
ramdisk.gz: 66.6% -- replaced with ramdisk

Next when i try to mount the ramdisk, i get following error:

bash# mount -o loop ramdisk /mnt/tmp
ramdisk: Permission denied

Can someone suggest the cause for this?

Thanks,
Anuj

/bin/bash · 12-20-2007, 01:16 PM

Make sure your loop devices are rw:

/dev/loop:
brw-rw---- 1 root disk 7, 0 2007-12-19 21:57 0
brw-rw---- 1 root disk 7, 1 2007-12-19 21:57 1
brw-rw---- 1 root disk 7, 2 2007-12-19 21:57 2
brw-rw---- 1 root disk 7, 3 2007-12-19 21:57 3
brw-rw---- 1 root disk 7, 4 2007-12-19 21:57 4
brw-rw---- 1 root disk 7, 5 2007-12-19 21:57 5

Also look at dmesg after you try to mount the ramdisk.