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Thread: SLES 10 SP4 system capacity can not exceed LV 1T

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  1. #1

    Question SLES 10 SP4 system capacity can not exceed LV 1T

    SLES 10 SP4 system LV needs expansion.
    VG still remaining capacity 120G, but these can not be assigned to a 900G capacity is in the LV.
    When prompted expansion LV, LV maximum capacity of 1T.
    How to solve this problem?

    =================vg information===================
    VG #PV #LV #SN Attr VSize VFree
    datavg 15 9 0 wz--n- 1.46T 122.00G
    =================vg detail information===================
    --- Volume group ---
    VG Name datavg
    System ID
    Format lvm2
    Metadata Areas 15
    Metadata Sequence No 30
    VG Access read/write
    VG Status resizable
    MAX LV 0
    Cur LV 9
    Open LV 9
    Max PV 0
    Cur PV 15
    Act PV 15
    VG Size 1.46 TB
    PE Size 4.00 MB
    Total PE 384000
    Alloc PE / Size 352768 / 1.35 TB
    Free PE / Size 31232 / 122.00 GB
    VG UUID ImxEpJ-y0c4-d2xs-2EAt-eQF0-UBaU-GF2W2P
    =================lv information===================
    LV VG Attr LSize Origin Snap% Move Log Copy%
    ldatalv datavg -wi-ao 998.00G
    --- Logical volume ---
    LV Name /dev/datavg/ldatalv
    VG Name datavg
    LV UUID Fmok2p-YDaD-YqjU-b9ax-3XZM-N2eZ-x1THww
    LV Write Access read/write
    LV Status available
    # open 2
    LV Size 998.00 GB
    Current LE 255488
    Segments 12
    Allocation inherit
    Read ahead sectors 0
    Block device 253:12

  2. #2
    Join Date
    Sep 2013
    Location
    Athens,Greece
    Posts
    51

    Re: SLES 10 SP4 system capacity can not exceed LV 1T

    if you try to resize LV (f.e add 10 gb to it) via

    lvextend -L+10G /dev/datavg/ldatalv

    what error you get?

    Michael.

  3. Re: SLES 10 SP4 system capacity can not exceed LV 1T

    Hi andyleigood,

    According to the FAQ, your kernel should support a larger size. From http://www.tldp.org/HOWTO/LVM-HOWTO/lvm2faq.html#AEN407 :

    4.1.13. What is the maximum size of a single LV? The answer to this question depends upon the CPU architecture of your computer and the kernel you are a running:


    • For 2.4 based kernels, the maximum LV size is 2TB. For some older kernels, however, the limit was 1TB due to signedness problems in the block layer. Red Hat Enterprise Linux 3 Update 5 has fixes to allow the full 2TB LVs. Consult your distribution for more information in this regard.

    • For 32-bit CPUs on 2.6 kernels, the maximum LV size is 16TB.

    • For 64-bit CPUs on 2.6 kernels, the maximum LV size is 8EB. (Yes, that is a very large number.)
    SLES10SP4 is pretty old, but typically runs some version of the 2.6 kernel. Do you have extended support for that installation? Then opening a service request might get you information on specific limits of the actual kernel/LVM versions used in your installation.

    What are the exact messages you get? A "cut&paste" output showing the command invocation plus the resulting messages of the actually failing run usually are most helpful for others.

    Regards,
    Jens
    From the times when today's "old school" was "new school"

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  4. #4

    Exclamation Re: SLES 10 SP4 system capacity can not exceed LV 1T

    20140410141515.png

    When using yast online expansion lv space, as prompted max = 1T.

  5. Re: SLES 10 SP4 system capacity can not exceed LV 1T

    Hi andyleigood,

    have you tried expanding it via command line tools? Else I recommend to open a service request, to get an explanation from engineering for that limit.

    Regards,
    Jens
    From the times when today's "old school" was "new school"

    If you find this post helpful and are logged into the web interface, show your appreciation and click on the star below...

  6. #6

    Re: SLES 10 SP4 system capacity can not exceed LV 1T

    Good advice.
    I'll use command to extend LV volunme.

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