topic Re: Unable to expand lun with Snapdrive 6.5.0.5474 in Data Protection

Unable to expand lun with Snapdrive 6.5.0.5474

deshaw — Thu, 05 Jun 2025 05:59:10 GMT

Hi,

We have SQL cluster with two nodes. We have lun of 1000 GB and we unable to expand the lun any further. There is enough space in the volume but the snapdrive doesn't recognize the available space and doesn't and we are running Snapdrive 6.5.0.5474 on both the nodes. Are there any limitations with the version of snapdrive we are running? I believe this is latest version available for download on Netapp site. Please advise.

Thanks.

Re: Unable to expand lun with Snapdrive 6.5.0.5474

ASHWANI8HIGHS — Thu, 04 Jul 2013 11:57:33 GMT

Hi ,

Can you please provide the status of the volume which holding this lun like

volume current usage (df -g ) , vol status ,vol options and if that volume is also holding any other lun ?

Thanks ,

Ashwani

Re: Unable to expand lun with Snapdrive 6.5.0.5474

martin_fisher — Thu, 04 Jul 2013 12:50:32 GMT

Surprised if this doesnt work in the latest release of SnapDrive!! As Ashwani asked. whats the output of df-g for the affected volume

Re: Unable to expand lun with Snapdrive 6.5.0.5474

deshaw — Tue, 09 Jul 2013 10:31:17 GMT

Filesystem	total	used	avail	Capacity Mount
/vol/volXXX_data0/	3328GB	2347GB	980GB	71%
/vol/volXXX_data0/.snapshot	0GB	413GB	0GB	---%

Above is df -g output for the volume.

Re: Unable to expand lun with Snapdrive 6.5.0.5474

ASHWANI8HIGHS — Tue, 09 Jul 2013 13:17:32 GMT

Hi ,

Sorry for not asking the below things 1st time .

Please also provide the ">vol option volume_name " output & details of other lun if any in this volume

Thanks

Ashwani

Re: Unable to expand lun with Snapdrive 6.5.0.5474

martin_fisher — Tue, 09 Jul 2013 14:48:57 GMT

Could you post the output of "lun show -v <lun name>" for the LUN's in the SQL cluster

Thanks

Re: Unable to expand lun with Snapdrive 6.5.0.5474

deshaw — Wed, 10 Jul 2013 06:54:09 GMT

I dont think there are any other luns in the volume. Below is the output. Thanks for the response.

fs*> vol options /vol/XXX_data0

nosnap=off, nosnapdir=off, minra=off, no_atime_update=on, nvfail=off,

ignore_inconsistent=off, snapmirrored=off, create_ucode=on,

convert_ucode=on, maxdirsize=335462, schedsnapname=ordinal,

fs_size_fixed=off, compression=off, guarantee=volume, svo_enable=off,

svo_checksum=off, svo_allow_rman=off, svo_reject_errors=off,

no_i2p=off, fractional_reserve=100, extent=off, try_first=volume_grow,

read_realloc=off, snapshot_clone_dependency=off, nbu_archival_snap=off

fs*> lun show -v /vol/XXX_data0/data0/data0.lun

/vol/XXX_data0/data0/data0.lun 1004.0g (1078087449600) (r/w, online, mapped)

Comment: " "

Serial#: Hn/8N4c1s6L4

Share: none

Space Reservation: enabled

Multiprotocol Type: windows_2008

Maps: dbnyc2d=3 dbnyc2c=10 viaRPC.iqn.1991-05.com.microsoft:dbnyc2a.deshaw.com=11 dbnyc2b=11

Occupied Size: 924.3g (992494899200)

Creation Time: Mon Apr 4 16:58:42 EDT 2011

Alignment: aligned

Cluster Shared Volume Information: 0x1

Re: Unable to expand lun with Snapdrive 6.5.0.5474

deshaw — Wed, 10 Jul 2013 10:36:10 GMT

Well, I found this article. And the Maxsize of the lun it set to 1 TB. Is there a way to change the max limit for the lun?

http://mtellin.com/2010/02/04/maximum-lun-resize-limits-on-netapp/

SCSI Disk Geometry:
             512 bytes/sector
             126 sectors/track
             255 tracks/cylinder (heads)
           32130 sectors/cylinder
           65535 cylinders
      2105639550 sectors
        16450560 cylinder size (15 MB)
   1078087449600 device size (1028144 MB)
   1078087449600 max resize size (1028144 MB)

Re: Unable to expand lun with Snapdrive 6.5.0.5474

martin_fisher — Wed, 10 Jul 2013 12:43:27 GMT

Hi deshaw. Please run the following coomand:
lun maxsize <path>

This should give an output like this:

lun maxsize /vol/LS_ESX5i_SC01_DATASTORE_vol

Space available for a LUN of type: solaris, aix, hpux, linux, netware, vmware, openvms, xen, solaris_efi or image

Without snapshot reserve: 204g (219043332096)

With snapshot reserve: 204g (219043332096)

With complete snapshot reserve: 102g (109521666048)

Space available for a LUN of type: windows, windows_gpt, windows_2008 or hyper_v

Without snapshot reserve: 203g (219039206400)

With snapshot reserve: 203g (219039206400)

With complete snapshot reserve: 101g (109511377920)

Looking at the outputs below you have space guarantee's at the volume level and your fractional reserve also set at 100%

I dont think there are any other luns in the volume. Below is the output. Thanks for the response.
fs*> vol options  /vol/XXX_data0
nosnap=off, nosnapdir=off, minra=off, no_atime_update=on, nvfail=off, 
ignore_inconsistent=off, snapmirrored=off, create_ucode=on, 
convert_ucode=on, maxdirsize=335462, schedsnapname=ordinal, 
fs_size_fixed=off, compression=off, guarantee=volume, svo_enable=off, 
svo_checksum=off, svo_allow_rman=off, svo_reject_errors=off, 
no_i2p=off, fractional_reserve=100, extent=off, try_first=volume_grow, 
read_realloc=off, snapshot_clone_dependency=off, nbu_archival_snap=off
fs*> lun show -v  /vol/XXX_data0/data0/data0.lun
    /vol/XXX_data0/data0/data0.lun 1004.0g (1078087449600) (r/w, online, mapped)
        Comment: " "
        Serial#: Hn/8N4c1s6L4
        Share: none
        Space Reservation: enabled
        Multiprotocol Type: windows_2008
        Maps: dbnyc2d=3 dbnyc2c=10 viaRPC.iqn.1991-05.com.microsoft:dbnyc2a.deshaw.com=11 dbnyc2b=11
        Occupied Size:  924.3g (992494899200) 
        Creation Time: Mon Apr  4 16:58:42 EDT 2011
        Alignment: aligned
        Cluster Shared Volume Information: 0x1

if you put the CLI in diag mode, you can run a LUN Geometry and this will tell you the max size that the LUN can be grown to, example:

lun geometry /vol/LS_ESX5i_SC01_DATASTORE_vol/LS_ESX5i_SC01-DATASTORE

SCSI Disk Geometry:

512 bytes/sector

2048 sectors/track

16 tracks/cylinder (heads)

32768 sectors/cylinder

9600 cylinders

314572800 sectors

16777216 cylinder size (16 MB)

161061273600 device size (153600 MB)

1099494850560 max resize size (1048560 MB)

If you can grow your LUN further, then you need to amend your Fractional Reserve and Guarantee settings.

Martin

Re: Unable to expand lun with Snapdrive 6.5.0.5474

ASHWANI8HIGHS — Wed, 10 Jul 2013 17:02:53 GMT

Is the lun has been grown to ten times its original size ?

Re: Unable to expand lun with Snapdrive 6.5.0.5474

martin_fisher — Wed, 10 Jul 2013 17:34:17 GMT

This is what im thinking and that if it has, then a new LUN will have to be created.