[ale] who is eating my drive

Tue May 31 14:49:53 EDT 2011

plus with swap on the same LVM with /, you can encrypt the entire LVM and a
laptop sleep is protected by the drive encryption. Additionally, changing
RAM sizes with swap on an LVM means you can adjust the swap amount as
needed.

swap notes: NEVER put swap on a raid5. If you must park swap on a RAID rig,
mirrored partitions are OK. If swap gets hosed, the box crashes. The RAID5/6
writes for swap are performance killers. Swap will do it own striping so
don't bother doing a raid10. multiple swap parts on multiple drive spindles
is a good thing. Say 8G RAM and 4 1TB drives, set up a 4G swap on each of
the drives.

I haven't dug in the kernel code itself, but supposedly, swap over 2G total
size is not relevant. By the time it's being used the box is crawling
anyway.

On Tue, May 31, 2011 at 2:28 PM, Lightner, Jeff <JLightner at water.com> wrote:

>  swapoff is used to disable a swap device according to the man page.  I
> haven’t used swapoff myself.
>
>
>
> After you’ve stopped the swap (or prevented it from coming up) you can
> remove it as a swap device from the partitioning (e.g. using fdisk or
> parted) and use the space for something else.   The simplest thing would be
> to use it to create a new filesystem.   You can extend the root partition
> but that takes some planning an effort because you have to extend the
> filesystem and since it is root it gets a little more involved.
>
>
>
> I have never heard anything that says swap can’t be on a primary disk
> partition and am pretty sure I’ve done that in the past.   However, these
> days I typically setup only two primary partitions – one for /boot and one
> for LVM then I make my filesystems and swap in the LVM volume group.
> Partions have limitations that I don’t care for as opposed to LVM.
>
>
>  ------------------------------
>
> *From:* ale-bounces at ale.org [mailto:ale-bounces at ale.org] *On Behalf Of *Narahari
> 'n' Savitha
> *Sent:* Tuesday, May 31, 2011 2:07 PM
>
> *To:* Atlanta Linux Enthusiasts
> *Subject:* Re: [ale] who is eating my drive
>
>
>
> Hmm.  Makes sense.  But I dont think you can make swap on the primary
> parition.  To make swap space you have to create extended and on that
> extended you setup up swap.
>
> Thats my understanding may be (and obivously ) it is wrong.
>
> Not sure how to undo the swap space.
>
> I have 8GB of Memory allocated to this VMWare session.
>
> I may not need almost any swap at all.
>
> Can I reclaim all the swap as a regular drive ?  If so how do I do that ?
>
> -Narahari
>
> On Tue, May 31, 2011 at 1:40 PM, Lightner, Jeff <JLightner at water.com>
> wrote:
>
> It is showing you made /dev/sda2 your Extended partition of 8 GB then used
> up all 8 GB in the sub-partition of the Extended partition as a SWAP device
> (/dev/sda5).   (By the way you don’t typically use Extended partition until
> you run out of primaries – you could have made /dev/sda2 itself the swap
> device.
>
>
>
> Type “swapon –s” and you should see this device.
>
>
>  ------------------------------
>
> *From:* ale-bounces at ale.org [mailto:ale-bounces at ale.org] *On Behalf Of *Narahari
> 'n' Savitha
> *Sent:* Tuesday, May 31, 2011 1:29 PM
> *To:* Atlanta Linux Enthusiasts
>
>
> *Subject:* Re: [ale] who is eating my drive
>
>
>
> Thanks for all your time.
>
>
>
> Here is the output of the fdisk -l command
>
> devusr at devusr-virtual-machine:~$ sudo fdisk -l /dev/sda
>
> Disk /dev/sda: 22.5 GB, 22548578304 bytes
> 255 heads, 63 sectors/track, 2741 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
> Sector size (logical/physical): 512 bytes / 512 bytes
> I/O size (minimum/optimal): 512 bytes / 512 bytes
> Disk identifier: 0x00075d29
>
>    Device Boot      Start         End      Blocks   Id  System
> /dev/sda1   *           1        1698    13630464   83  Linux
> /dev/sda2            1698        2742     8386561    5  Extended
> /dev/sda5            1698        2742     8386560   82  Linux swap /
> Solaris
>
>
>
> So what should I be looking here for ?
>
> -Narahari
>
>
>
> Proud partner. Susan G. Komen for the Cure.
>
>
>
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