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7 Answers

Swap does not mount [swapon failed: Device or resource busy]

Asked by: 1748 views , , , ,
Debian, Disk Partition, General

Hi,

The swap partition did not mount post-installation (Debian “Squeeze” (Xfce)).
Created a 2nd swap partition, & planned to delete the earlier swap partition. The 2nd swap partition doesn’t mount either.
 
Further info:
Followed the instructions at http://web.mit.edu/rhel-doc/5/RHEL-5-ma … dding.html
Name of logical volume: HU

/etc/fstab: (commented out the earlier swap partition)
———————
# /etc/fstab: static file system information.
#
# Use ‘blkid’ to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
/dev/mapper/HU-root / ext3 errors=remount-ro 0 1
# /boot was on /dev/sda5 during installation
UUID=50ed87f2-905e-4780-b867-

a8e0831e3db8 /boot ext3 defaults 0 2
/dev/mapper/HU-home /home ext3 defaults,user_xattr 0 2

/dev/scd0 /media/cdrom0 udf,iso9660 user,noauto 0 0
/dev/sdb1 /media/usb0 auto rw,user,noauto 0 0

#/dev/mapper/HU-swap none swap sw 0 0
#2nd_swap
/dev/mapper/HU-swap2 swap swap defaults 0 0
——————————————————————————————————————————

(tried /dev/HU/swap2 instead of /dev/mapper/HU-swap2. Did not work.)

Output of fdisk -l

Code: Select all
Disk /dev/sda: 120.0 GB, 120034123776 bytes
255 heads, 63 sectors/track, 14593 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: 0xed1f86f7

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1          64      512000   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2   *          64          77      102400    7  HPFS/NTFS
Partition 2 does not end on cylinder boundary.
/dev/sda3              77        3481    27343750    7  HPFS/NTFS
Partition 3 does not end on cylinder boundary.
/dev/sda4            3481       14594    89261057    5  Extended
Partition 4 does not end on cylinder boundary.
/dev/sda5            3481        3572      732160   83  Linux
/dev/sda6            3573       14594    88527872   8e  Linux LVM

Output of swapon -a

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swapon: /dev/mapper/HU-swap2: swapon failed: Device or resource busy

Output of swapon -va

Code: Select all
swapon on /dev/mapper/HU-swap2
swapon: /dev/mapper/HU-swap2: found swap signature: version 1, page-size 4, same byte order
swapon: /dev/mapper/HU-swap2: pagesize=4096, swapsize=2147483648, devsize=2147483648
swapon: /dev/mapper/HU-swap2: swapon failed: Device or resource busy

Output of swapon -s

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swapon on /dev/mapper/HU-swap2
Filename            Type      Size   Used   Priority
/dev/dm-3                               partition   2097144   0   42

Output of mount /dev/HU/swap2
mount: mount point none does not exist

How can I mount swap upon booting? Would really appreciate help/suggestions.
Thanks for your time and patience,

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7 Answers



  1. wolverine_tech on Sep 15, 2011

    Also, upon trying to Hibernate the system, I get the message : Cannot find swap device, try swapon -a)

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  2. wolverine_tech on Sep 15, 2011

    The output of free -m
    —————————————————————————-
    total used free shared buffers cached
    Mem: 3017 552 2464 0 14 293
    -/+ buffers/cache: 243 2773
    Swap: 2047 0 2047
    —————————————————————————-
    The two swap partitions are 2 GB each.

    Output of:
    swapon -a
    —————————————————————————-
    swapon: /dev/mapper/HU-swap: read swap header failed: Invalid argument
    swapon: /dev/mapper/HU-swap2: swapon failed: Device or resource busy
    —————————————————————————-
    I’m guessing the 1st partition is not showing (even after removing the # (‘un-commenting’) the line for swap in /etc/fstab)

    Does this mean a swap partition is ‘active’ (i.e., being used)?

    I’m planning on deleting that partition 1st swap partition anyway. (Any suggestions?)

    Thank you so much. (Your suggestions really help & all your tutorials should be included in the wiki pages of the respective distros)

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  3. wolverine_tech on Sep 15, 2011

    Just found out the output for mount, swapon -a, and fdisk -l are similar on my other machine (also running Debian 6). The hard drive of this other machine was partitioned using Debian’s default (auto) LVM partitioning scheme (unencrypted) & the machine has Debian only (i.e., no Win 7).

    Am I looking for issues that aren’t there? Is my swap partition being used as normal? Is there a way to confirm?

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    • finid on Sep 15, 2011

      Run the command below and see what it tells you:

      free -m

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  4. wolverine_tech on Sep 15, 2011

    Also, the output of mount /dev/HU/swap2 is

    mount: mount point none does not exist

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  5. wolverine_tech on Sep 14, 2011

    The swap partition did not show up in the fdisk -l output. I tried mounting it manually (mount /dev/HU/swap) … still nothing.

    I think the original swap partition isn’t being recognized as ‘swap’ (or anything).
    The output of blkid is
    /dev/sda1: UUID=”f07ac41a-b2d1-4084-83d3-25cce4c8f931″ TYPE=”ext4″
    /dev/sda2: LABEL=”System Reserved” UUID=”16BE11EEBE11C761″ TYPE=”ntfs”
    /dev/sda3: UUID=”56A21538A2151DD5″ TYPE=”ntfs”
    /dev/sda6: UUID=”5L24ep-T3Lg-V9or-fsTm-8MQV-6UsF-7s3gaz” TYPE=”LVM2_member”
    /dev/sda5: UUID=”50ed87f2-905e-4780-b867-a8e0831e3db8″ TYPE=”ext3″
    /dev/mapper/HU-root: UUID=”48c2a95a-1fd1-4f8e-8bb0-2439fa79e995″ TYPE=”ext3″
    /dev/mapper/HU-home: UUID=”13ffbc1d-7209-4140-ac15-834b4abc342f” TYPE=”ext3″
    /dev/mapper/HU-swap2: UUID=”e974ff51-7d19-407f-ae77-40c99ad4c987″ TYPE=”swap”

    which shows the new (2nd) swap partition (swap2), but not the 1st swap.

    While both swap partitions show as ‘swap’ file system on the using the GUI tool system-config-lvm does show both swap partitions. It say ‘Unmounted’ on the mount point field, though.

    If helps to know: I’m dual booting with Win 7. (The Win partition does not see the linux partitions.) With 2GB of RAM, I’m able to get things done without any issues, but I just want to understand what I’m doing wrong with my swap partition.

    Please let me know if I can provide any further info to sort this out.

    Thanks.

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  6. finid on Sep 14, 2011

    Question:

    How did you determine that swap did not mount after installation? What command did you use to tell?

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