[Linux] Re: Ram Disks
Peter Capazzi
linux@flux.org
Tue, 15 Jan 2008 12:05:28 -0500
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>It might help to know what distribution you're running. The page you
posted
>appears to be about RedHat Linux 9 with a 2.4 kernel which is pretty
old
>(5-6 years?). The docs for Linux 2.6 though seem to indicate that the
>options are all the same. If you're not using grub for your boot
loader,
>you'll have to adjust the instructions for your particular installation
>(which is why I asked about the dist, someone here might be able to
help
>with other dists).
Thank you for your help. I'm running SLES 9.3 (kernel 2.6.5-7).
Ok... I've modified the boot loader and I see the change has taken
effect from dmesg.
=20
I get stuck here:
/home/pcapazzi # mkdir /mnt/rd
/home/pcapazzi # mount /dev/ram0 /mnt/rd
mount: wrong fs type, bad option, bad superblock on /dev/ram0,
or too many mounted file systems
There are only a few mounts:
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/ida/c0d0p2 10227392 5418432 4808960 53% /
tmpfs 1037296 12 1037284 1% /dev/shm
/dev/ida/c0d0p3 10183364 32840 10150524 1% /backupsys
/dev/ida/c0d0p4 5185500 32840 5152660 1% /home2
=20
The above is also after I ran the following (per the link I gave
earlier):
=20
/home/pcapazzi # mke2fs -m 0 /dev/ram0
mke2fs 1.38 (30-Jun-2005)
Filesystem label=3D
OS type: Linux
Block size=3D4096 (log=3D2)
Fragment size=3D4096 (log=3D2)
125184 inodes, 250000 blocks
0 blocks (0.00%) reserved for the super user
First data block=3D0
8 block groups
32768 blocks per group, 32768 fragments per group
15648 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376
=20
Writing inode tables: done
Writing superblocks and filesystem accounting information: done
=20
This filesystem will be automatically checked every 32 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
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<DIV><SPAN class=3D183015016-15012008>></SPAN>It might help to know =
what=20
distribution you're running. The page you posted<BR><SPAN=20
class=3D183015016-15012008>></SPAN>appears to be about RedHat Linux 9 =
with a=20
2.4 kernel which is pretty old<BR><SPAN =
class=3D183015016-15012008>></SPAN>(5-6=20
years?). The docs for Linux 2.6 though seem to indicate that =
the<BR><SPAN=20
class=3D183015016-15012008>></SPAN>options are all the same. If =
you're not=20
using grub for your boot loader,<BR><SPAN=20
class=3D183015016-15012008>></SPAN>you'll have to adjust the =
instructions for=20
your particular installation<BR><SPAN =
class=3D183015016-15012008>></SPAN>(which=20
is why I asked about the dist, someone here might be able to =
help<BR><SPAN=20
class=3D183015016-15012008>></SPAN>with other dists).<BR></DIV>
<DIV><SPAN class=3D183015016-15012008><FONT face=3DArial size=3D2>Thank =
you for your=20
help. I'm running SLES 9.3 (kernel 2.6.5-7).</FONT></SPAN></DIV>
<DIV><SPAN class=3D183015016-15012008><FONT face=3DArial size=3D2>Ok... =
I've modified=20
the boot loader and I see the change has taken effect from=20
dmesg.</FONT></SPAN></DIV>
<DIV><SPAN class=3D183015016-15012008><FONT face=3DArial=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D183015016-15012008><FONT face=3DArial =
size=3D2>I get stuck=20
here:</FONT></SPAN></DIV>
<DIV><SPAN class=3D183015016-15012008><FONT face=3DArial =
size=3D2>/home/pcapazzi #=20
mkdir /mnt/rd<BR>/home/pcapazzi # mount /dev/ram0 /mnt/rd<BR>mount: =
wrong fs=20
type, bad option, bad superblock on=20
/dev/ram0,<BR> or too many mounted =
file=20
systems<BR></FONT></SPAN></DIV>
<DIV><SPAN class=3D183015016-15012008><FONT face=3DArial size=3D2>There =
are only a few=20
mounts:</FONT></SPAN></DIV>
<DIV><SPAN class=3D183015016-15012008><FONT face=3DArial=20
size=3D2>Filesystem =
=20
1K-blocks Used Available Use% Mounted=20
on<BR>/dev/ida/c0d0p2 =
10227392 =20
5418432 4808960 53%=20
/<BR>tmpfs &nb=
sp; =20
1037296 12 =20
1037284 1%=20
/dev/shm<BR>/dev/ida/c0d0p3 =20
10183364 32840 10150524 1%=20
/backupsys<BR>/dev/ida/c0d0p4 =20
5185500 32840 5152660 1% =
/home2<BR></DIV></FONT></SPAN>
<DIV><SPAN class=3D183015016-15012008><FONT face=3DArial=20
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D183015016-15012008><FONT face=3DArial size=3D2>The =
above is also=20
after I ran the following (per the link I gave =
earlier):</FONT></SPAN></DIV>
<DIV><SPAN class=3D183015016-15012008><FONT face=3DArial size=3D2><SPAN=20
class=3D183015016-15012008><FONT face=3DArial=20
size=3D2></FONT></SPAN></FONT></SPAN> </DIV>
<DIV><SPAN class=3D183015016-15012008><FONT face=3DArial size=3D2><SPAN=20
class=3D183015016-15012008><FONT face=3DArial size=3D2>/home/pcapazzi # =
mke2fs -m 0=20
/dev/ram0<BR>mke2fs 1.38 (30-Jun-2005)<BR>Filesystem label=3D<BR>OS =
type:=20
Linux<BR>Block size=3D4096 (log=3D2)<BR>Fragment size=3D4096 =
(log=3D2)<BR>125184 inodes,=20
250000 blocks<BR>0 blocks (0.00%) reserved for the super user<BR>First =
data=20
block=3D0<BR>8 block groups<BR>32768 blocks per group, 32768 fragments =
per=20
group<BR>15648 inodes per group<BR>Superblock backups stored on=20
blocks:<BR> 32768, 98304, =
163840,=20
229376</FONT></SPAN></DIV>
<DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><SPAN class=3D183015016-15012008><FONT face=3DArial =
size=3D2>Writing inode=20
tables: done<BR>Writing superblocks and filesystem accounting =
information:=20
done</FONT></SPAN></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><SPAN class=3D183015016-15012008><FONT face=3DArial size=3D2>This =
filesystem will=20
be automatically checked every 32 mounts or<BR>180 days, whichever comes =
first. Use tune2fs -c or -i to=20
override.<BR></FONT></SPAN></DIV></DIV></FONT></SPAN></BODY></HTML>
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