nixCraft

Hi All,

i had problem with enabling swap space on "Boot Time".

while my Redhat Linux Booting into run level 3 , then it suddenly got

struck up with swap space enabling. i couldn't find out the reason.

anybody can suggest me how to resolv this issue? The time is takes to enable

swap space is unpredictable.

thanks,

aaru

Boot into single user mode and make sure /etc/fstab has correct entries. You can also format swap partition

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Vivek | My personal blog
Linux Evangelist
Play hard stay cool

hi nixcraft,

thanks for ur reply.

after this pbm happend, 1st step i did is using "single user" to boot the system.while the time we are entering into single user mode, its easily enable the swap space.means "Enabling Swap Space [ok] ".but, if i am trying to run into multi user mode say runlevel 3, it just hangs up.
i couldn't able to find out the reason. my /etc/fstab file is edited properly.if u need i can paste into this forum.give me any solution for this.b'cz i am trying to find out this answer from past 1 & half year.

thanks,
aaru

Paste your fstab file. Have you tried to reformat swap only partition? Is hard disk free from any errors ?

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Vivek | My personal blog
Linux Evangelist
Play hard stay cool

Hi nixcraft,

thanks for your reply.i didn't format my swap partition.my fstab file is below,

# This file is edited by fstab-sync - see 'man fstab-sync' for details
LABEL=/ / ext3 defaults 1 1
LABEL=/boot /boot ext3 defaults 1 2
none /dev/pts devpts gid=5,mode=620 0 0
none /dev/shm tmpfs defaults 0 0
LABEL=/mnt/gp1 /mnt/gp1 ext3 defaults 1 2
none /proc proc defaults 0 0
none /sys sysfs defaults 0 0
/dev/sda5 swap swap defaults 0 0
/dev/hda /media/cdrom auto pamconsole,exec,noauto,managed 0 0
/dev/fd0 /media/floppy auto pamconsole,exec,noauto,managed 0 0

thanks,

aaru.


~

Just format swap partition using mkswap and turn on swap using swapon command it should work

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Rocky Jr.
You may have my body & soul, but you will never touch my pride!

If you have knowledge, let others light their candles at it.

Certified to work on HP-UX / Sun Solaris / RedHat

I got the same problem on compiling new kernel..

its hangs on swap space

i tried to format mkswap -a /dev/hda5

but swapon /dev/hda5 says its busy...

mount shows no swap partition is mounted!!!

bu fstab has SWAP-hda5 entry..

Try to solve the problem asap??


Thanks...

Hi Sandeep,

Before formatting swap partition please disable that partition.To do that,

#swapoff /dev/hda5 (your /etc/fstab entry for swap).

To Create new swap partition do the follow,

step1:

Create new partition by using "fdisk".Say here "/dev/hdaX"

step2:
Create Swap signature on that partition.to do that,

#mkswap -v1 /dev/hdaX

step3:

Enable swap partition,

#swapon /dev/hdaX

step4:

Check the status of swap partition.

#swapon -s

Filename Type Size Used Priority
/dev/hdbX partition 1052248 0 -2

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thanks,
aaru

create an extra swap partition. these days we got 500 GiB external and 1 TiB internal and max 32 TiB internal hdd. so if you are running mission critical things like database then you need 4x RAM = swap. yeah you may also have extra swap partitions. if you dont use them? disable them. or create a temporary swap space.
http://www.redhat.com/docs/manuals/l...ap-adding.html
man fstab on how to add more than one swap space. besides you got enough space my friend 40-80-120-300 GiB for swap. imagine me working on a 2 GiB USB which is encrypted and NO SWAP. dang! i have to create a file like that from that URL and run it when i am in a machine with incredible low ram and had to borrow some space from hdd where it is normally ntfs or fat.

if muhammad cant go to mountain, bring the mountain to muhammad? hell no, tie muhammad in a bed and carry muhammad to mountain. mountains in these days are heavy than the mountains in those days.