Stuffed up Swap

[OneSalientOversigh]

In my efforts to solve other problems I have inadvertently managed to stuff up my swap. It's still there, it's just that it never gets automatically enabled whenever I restart the computer. At this point the only way I can get it working is to do it manually - ie go into System Settings --> Disk and Filesystems --> Administrator mode --> Enable partition.

I have two 40gb Hard drives. They look like this:

Disk WDC WD400JB-00ET
1 Partition 13.0 gb (unmounted) /dev/sda1
3 Partition 24.3 gb /home ext3 /dev/sda3 Enabled

Disk WDC WD400JB-00FM
1 Partition 29.3gb (root) /dev/sdb1 Enabled
2 Partition 8.0gb /swap /dev/sdb2 Disabled

I've tried a few times to make the swap enable at boot but to no avail.

Also - I have an unounted 13.0gb section on the first drive. How do I mount this?

[jankushka]

Re: Stuffed up Swap

let's see...
pls, open up a konsole and post the result of the following commands:

dmesg | grep -i swap

sudo fdisk -l /dev/sda /dev/sdb

cat /etc/fstab

ls -l /dev/disk/by-uuid/

[OneSalientOversigh]

Re: Stuffed up Swap

neil@neil-desktop:~$ dmesg | grep -i swap
[ 692.279084] Adding 8361820k swap on /dev/sdb2. Priority:-1 extents:1 across:8361820k

--------------------

neil@neil-desktop:~$ sudo fdisk -l /dev/sda /dev/sdb
Password:

Disk /dev/sda: 40.0 GB, 40020664320 bytes
255 heads, 63 sectors/track, 4865 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 1 1697 13631121 83 Linux
/dev/sda3 1698 4865 25446960 83 Linux

Disk /dev/sdb: 40.0 GB, 40020664320 bytes
255 heads, 63 sectors/track, 4865 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sdb1 1 3824 30716248+ 83 Linux
/dev/sdb2 3825 4865 8361832+ 82 Linux swap / Solaris

--------------------

neil@neil-desktop:~$ cat /etc/fstab
# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
# /dev/hdb1
UUID=04c95748-a0ef-4f0d-a713-ccc1ff83f2b9 / ext3 nouser,defaults,errors=remount-ro,atime,auto,rw,dev,exec,suid 0 1
# /dev/hda3
UUID=17693f6f-55e7-45eb-9fba-d7a885cf268b /home ext3 nouser,defaults,atime,auto,rw,dev,exec,suid 0 2
# /dev/hda1
# /dev/hdb2
/dev/scd1 <mount\040point> auto nouser,atime,noauto,rw,nodev,noexec,nosuid 0 0
/dev/hdd /media/cdrom0 auto user,atime,noauto,rw,dev,exec,suid 0 0
/dev/ /media/floppy0 auto user,atime,noauto,rw,dev,exec,suid 0 0
/dev/scd0 <mount\040point> iso9660 noauto 0 0
/dev/scd1 auto nouser,atime,auto,rw,nodev,noexec,nosuid 0 0
/dev/scd1 /media/cdrom1 auto nouser,atime,noauto,rw,nodev,noexec,nosuid 0 0
/dev/scd1 <mount\040point> auto nouser,atime,noauto,rw,nodev,noexec,nosuid 0 0
/dev/scd0 <mount\040point> auto nouser,atime,noauto,rw,nodev,noexec,nosuid 0 0
/dev/scd1 <mount\040point> iso9660 noauto 0 0
/dev/scd1 <mount\040point> auto nouser,atime,noauto,rw,nodev,noexec,nosuid 0 0
/dev/scd0 /media/cdrom0 auto nouser,atime,noauto,rw,nodev,noexec,nosuid 0 0
/dev/scd1 /media/cdrom1 auto nouser,atime,noauto,rw,nodev,noexec,nosuid 0 0
/dev/scd0 /media/cdrom0 auto nouser,atime,noauto,rw,nodev,noexec,nosuid 0 0
/dev/scd1 /media/cdrom1 auto nouser,atime,noauto,rw,nodev,noexec,nosuid 0 0
/dev/sdb2 swap noauto 0 0
/dev/sdb2 swap noauto 0 0
/dev/scd0 /media/cdrom0 auto nouser,atime,noauto,rw,nodev,noexec,nosuid 0 0
/dev/scd1 /media/cdrom1 auto nouser,atime,noauto,rw,nodev,noexec,nosuid 0 0
/dev/sdb2 swap noauto 0 0
/dev/sdb2 swap noauto 0 0
/dev/sdb2 /swap swap noauto 0 0

--------------------

neil@neil-desktop:~$ ls -l /dev/disk/by-uuid/
total 0
lrwxrwxrwx 1 root root 10 2007-07-10 16:52 04c95748-a0ef-4f0d-a713-ccc1ff83f2b9 -> ../../sdb1
lrwxrwxrwx 1 root root 10 2007-07-10 16:52 17693f6f-55e7-45eb-9fba-d7a885cf268b -> ../../sda3
lrwxrwxrwx 1 root root 10 2007-07-10 16:52 1d33c201-4f18-4bbe-a745-a0867d16cf19 -> ../../sdb2
lrwxrwxrwx 1 root root 10 2007-07-10 16:52 7e6a585d-73cf-44fc-9bf1-50ad1f040f86 -> ../../sda1
neil@neil-desktop:~$

[penguin.ch]

Re: Stuffed up Swap

/dev/sdb2 /swap swap noauto 0 0

Remove that one completely (as well as all the "multi-entries").

[jankushka]

Re: Stuffed up Swap

wow...your fstab file is a total mess
now, the unicornrider's suggestion will fix the swap thing.
but your fstab file still needs cleaning.
quite a bit of cleaning, actually.

you can edit the file by hitting alt-f2 and then entering the following command:

kdesu kate /etc/fstab

you only need 1 line like this one in fstab

/dev/sdb2 swap noauto 0 0

remove all the others referring to /dev/sdb2

you only need these 2 lines:

/dev/scd0 /media/cdrom0 auto nouser,atime,noauto,rw,nodev,noexec,nosuid 0 0
/dev/scd1 /media/cdrom1 auto nouser,atime,noauto,rw,nodev,noexec,nosuid 0 0

remove all the others referring to /dev/scd0 and /dev/scd1.

i guess this is also a line you can get rid of:

/dev/hdd /media/cdrom0 auto user,atime,noauto,rw,dev,exec,suid 0 0

hth

[OneSalientOversigh]

Re: Stuffed up Swap

Okay, done all that.

But, according to my KDE system guard, I still "no swap space available"

I'll do all the Konsole stuff again:

neil@neil-desktop:~$ dmesg | grep -i swap

-------------------

neil@neil-desktop:~$ sudo fdisk -l /dev/sda /dev/sdb
Password:

Disk /dev/sda: 40.0 GB, 40020664320 bytes
255 heads, 63 sectors/track, 4865 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 1 1697 13631121 83 Linux
/dev/sda3 1698 4865 25446960 83 Linux

Disk /dev/sdb: 40.0 GB, 40020664320 bytes
255 heads, 63 sectors/track, 4865 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sdb1 1 3824 30716248+ 83 Linux
/dev/sdb2 3825 4865 8361832+ 82 Linux swap / Solaris

-------------------

neil@neil-desktop:~$ cat /etc/fstab
# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
# /dev/hdb1
UUID=04c95748-a0ef-4f0d-a713-ccc1ff83f2b9 / ext3 nouser,defaults,errors=remount-ro,atime,auto,rw,dev,exec,suid 0 1
# /dev/hda3
UUID=17693f6f-55e7-45eb-9fba-d7a885cf268b /home ext3 nouser,defaults,atime,auto,rw,dev,exec,suid 0 2
# /dev/hda1
# /dev/hdb2
/dev/sdb2 swap noauto 0 0
/dev/scd0 /media/cdrom0 auto nouser,atime,noauto,rw,nodev,noexec,nosuid 0 0
/dev/scd1 /media/cdrom1 auto nouser,atime,noauto,rw,nodev,noexec,nosuid 0 0
/dev/ /media/floppy0 auto user,atime,noauto,rw,dev,exec,suid 0 0

-------------------

neil@neil-desktop:~$ ls -l /dev/disk/by-uuid/
total 0
lrwxrwxrwx 1 root root 10 2007-07-10 23:10 04c95748-a0ef-4f0d-a713-ccc1ff83f2b9 -> ../../sdb1
lrwxrwxrwx 1 root root 10 2007-07-10 23:10 17693f6f-55e7-45eb-9fba-d7a885cf268b -> ../../sda3
lrwxrwxrwx 1 root root 10 2007-07-10 23:10 1d33c201-4f18-4bbe-a745-a0867d16cf19 -> ../../sdb2
lrwxrwxrwx 1 root root 10 2007-07-10 23:10 7e6a585d-73cf-44fc-9bf1-50ad1f040f86 -> ../../sda1
neil@neil-desktop:~$

[penguin.ch]

Re: Stuffed up Swap

/dev/sdb2 swap noauto 0 0

That's supposed to read:

/dev/sdb2  none  swap  sw  0  0

[jankushka]

Re: Stuffed up Swap

sorry.
my mistake.
copied and pasted the wrong line.

[penguin.ch]

Re: Stuffed up Swap

copied and pasted the wrong line

Not surprising as there was no right one

[jankushka]

Re: Stuffed up Swap

Not surprising as there was no right one

now, One Salient Oversight, just out of curiosity...
how the heck did you end up with such a mess in fstab?

Also - I have an unounted 13.0gb section on the first drive. How do I mount this?

easy enough.
assuming:
a)on that partition you already have an ext3 filesystem
b)you want to mount it under /media
c)you want to mount it by the name of sda1

open up a konsole, then do the following:

sudo -i
cd /media
mkdir sda1

then hit alt-f2 and type:

kdesu kate /etc/fstab

add the following lines, then save and exit:

# /dev/sda1
UUID=7e6a585d-73cf-44fc-9bf1-50ad1f040f86 /media/sda1 ext3 defaults 0 3

then go back to the konsole above and type:

mount /dev/sda1

next time you boot, it'll be done automatically

that should be all... 8)

[OneSalientOversigh]

Re: Stuffed up Swap

Ahh tis all working now. Kudos to both of you.

how the heck did you end up with such a mess in fstab?

I was trying to find out why I was having problems somewhere else and I obviously experimented as Administrator during system settings. Since I didn't know anything about fstab, all I did to try and fix mistakes was to work with System settings via a process of trial and error. Well, we're wiser now (though not by much!)

Cheers

[jankushka]

Re: Stuffed up Swap

ah...system settings...my favourite set of tools.
well, forget about those...
and take care.

[mistrynitesh]

Re: Stuffed up Swap

This is how my fstab looks...

nitesh@Mistrys:~$ cat /etc/fstab
# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
# /dev/sda6
UUID=7bcb827b-bbde-4453-aae8-8be8fee91f2d / ext2 defaults,errors=remount-ro 0 1
# /dev/sda9
UUID=bbca2d22-5008-4375-ae40-07f0066077d6 /home ext2 defaults 0 2
# /dev/sda1
UUID=3221-0CD4 /media/sda1 vfat defaults,utf8,umask=007,gid=46 0 1
# /dev/sda5
UUID=16D3-2223 /media/sda5 vfat defaults,utf8,umask=007,gid=46 0 1
# /dev/sda8
UUID=5c2b6cdd-2ac4-42e2-aea1-d787a3807573 /usr ext2 defaults 0 2
# /dev/sda7
UUID=b5ca85ff-3532-4b50-a95a-40ef00a6334e none swap sw 0 0
/dev/scd0 /media/cdrom0 udf,iso9660 user,noauto 0 0
/dev/fd0 /media/floppy0 auto rw,user,noauto 0 0

where sda7 is my swap partition

looks pretty much like suggested above. Still my swap partition does not get enabled on startup. I need to go to 'Gnome Partition Editor' and from there, I enable the swap partition everytime.

P.S.: I would like a few more things:
This problem has started after I installed Elive on another partition and now it is the default OS on my computer. Also this problem does not occur when I use Elive. While installing Elive, I did not create a new swap partition as I had read somewhere that all linux systems on a computer can use common swap partition.
I am also posting the fstab table of Elive

# /dev/hda7 none swap sw 0 0

[jankushka]

Re: Stuffed up Swap

guess it could be caused by a wrong uuid...

let's see...
in a konsole, pls, issue the following:

findfs UUID=b5ca85ff-3532-4b50-a95a-40ef00a6334e

and see what is says...

another thing you could try is to edit your fstab file and replace

# /dev/sda7
UUID=b5ca85ff-3532-4b50-a95a-40ef00a6334e none swap sw 0 0

supposedly by

# /dev/sda7
/dev/sda7 none swap sw 0 0

and then reboot to see what happens.

hth
cheers

[mistrynitesh]

Re: Stuffed up Swap

another thing you could try is to edit your fstab file and replace

# /dev/sda7
UUID=b5ca85ff-3532-4b50-a95a-40ef00a6334e none swap sw 0 0

supposedly by

# /dev/sda7
/dev/sda7 none swap sw 0 0

and then reboot to see what happens.

this worked (didn't try the first option, though).
As an afterthought, why shouldn't I change this for all the partitions? How do UUIDs help?