Hi ALL,
I have a harddisk with 3 primary partitions and one extended partitions. Under extented partions , there are 15 partions.
Whole hard disk has been partitioned in a standard way, (i.e NOT LVM)
It has 2GB ram. swap is also 2GB.
Now I want to extend this swap to 4 GB.
If I use dd coomand and create a file with 2GB, Will I be able to extend the swap witn swapon commnad?
How can I achive this?
Hope to hear form you,
Indunil Jayasooriya wrote:
Hi ALL,
I have a harddisk with 3 primary partitions and one extended partitions. Under extented partions , there are 15 partions.
Whole hard disk has been partitioned in a standard way, (i.e NOT LVM)
It has 2GB ram. swap is also 2GB.
Now I want to extend this swap to 4 GB.
If I use dd coomand and create a file with 2GB, Will I be able to extend the swap witn swapon commnad?
How can I achive this?
Hope to hear form you,
I just now shelled into a newly-loaded FC8 box and expanded the swap with a swap file:
[rj@mavis ~]$ ssh beau rj@beau's password: Last login: Tue Nov 4 11:31:13 2008 [rj@beauregard ~]$ su - Password: # Create the file: [root@beauregard ~]# dd if=/dev/zero of=/root/swapfile bs=1G count=1 1+0 records in 1+0 records out 1073741824 bytes (1.1 GB) copied, 119.248 s, 9.0 MB/s #Make the swap fs on the file: [root@beauregard ~]# mkswap -c /root/swapfile Setting up swapspace version 1, size = 1073737 kB no label, UUID=c75b5eaa-b483-44c8-9e4c-c895b16b045c # Create an entry in fstab: [root@beauregard ~]# echo "/root/swapfile swap swap defaults 0 0" >> /etc/fstab # Activate the new swap area: [root@beauregard ~]# swapon -a # Sure enough, it is in use: [root@beauregard ~]# cat /proc/swaps Filename Type Size Used Priority /dev/sda5 partition 1534168 75304 -1 /root/swapfile file 1048568 0 -2 [root@beauregard ~]#
Hi Robert ,
First off all , thank you very much for your step by steb info. The below command creates a 1 GB file. there you have mentioned bs=1G count=1. What is count 1 there?
# Create the file: [root@beauregard ~]# dd if=/dev/zero of=/root/swapfile bs=1G count=1 1+0 records in 1+0 records out 1073741824 bytes (1.1 GB) copied, 119.248 s, 9.0 MB/s #Make the swap fs on the file:
If I want to create a file with 2 GB , then , What should I mention? count 2 or 1?
What is the correct one out of below 2 commands
dd if=/dev/zero of=/root/swapfile bs=2G count=2
or
dd if=/dev/zero of=/root/swapfile bs=2G count=1
Hope to hear form you.
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
on 11-4-2008 11:16 PM Indunil Jayasooriya spake the following:
Hi Robert ,
First off all , thank you very much for your step by steb info. The below command creates a 1 GB file. there you have mentioned bs=1G count=1. What is count 1 there?
`bs=BYTES' Both read and write BYTES bytes at a time. This overrides `ibs' and `obs'. so write with 1GB blocks and write only 1. For 2 GB you could have count=2
# Create the file: [root@beauregard ~]# dd if=/dev/zero of=/root/swapfile bs=1G count=1 1+0 records in 1+0 records out 1073741824 bytes (1.1 GB) copied, 119.248 s, 9.0 MB/s #Make the swap fs on the file:
If I want to create a file with 2 GB , then , What should I mention? count 2 or 1?
What is the correct one out of below 2 commands
dd if=/dev/zero of=/root/swapfile bs=2G count=2
2G x 2 = 4GB
or
dd if=/dev/zero of=/root/swapfile bs=2G count=1
That would give you 2 GB but so would bs=1G count=2
Hope to hear form you.
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
On Wednesday 05 November 2008 04:41:31 Indunil Jayasooriya wrote:
Hi ALL,
I have a harddisk with 3 primary partitions and one extended partitions. Under extented partions , there are 15 partions.
Whole hard disk has been partitioned in a standard way, (i.e NOT LVM)
It has 2GB ram. swap is also 2GB.
Now I want to extend this swap to 4 GB.
If I use dd coomand and create a file with 2GB, Will I be able to extend the swap witn swapon commnad?
How can I achive this?
Hope to hear form you,
Are you sure you are actually using the current swap? If you are not short of RAM you probably aren't. See what top says about my laptop:
538136k total, 0k used,
Anne
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Anne Wilson -
Christopher Chan -
Indunil Jayasooriya -
Robert -
Scott Silva