topic Re: lun resize in VMware Solutions Discussions

lun resize

TDUBB1234 — Thu, 05 Jun 2025 06:51:19 GMT

how do I resize a lun to fill out all the remaining space allowed?

lun maxsize /vol/voltest/voltest_qtr

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

Without snapshot reserve: 16353m (17147363328)

With snapshot reserve: no space

With complete snapshot reserve: no space

how do I use lun resize to automatically use all the remaining space?

lun resize

lwei — Thu, 07 Jul 2011 05:02:59 GMT

You can use "lun resize /vol/voltest/voltest_qtr +16353m". -Wei

Re: lun resize

TDUBB1234 — Thu, 25 Aug 2011 19:36:10 GMT

having a problem resizing a lun

df -h

/vol/test/ 104GB 80GB 23GB 77% /vol/test/

/vol/test/.snapshot 25GB 0TB 25GB 0% /vol/test/.snapshot

AGGR SHOW_SPACE

test 130GB 48GB volume

> lun resize /vol/test/test_qtr/test.lun +5g

lun resize: New size exceeds this LUN's initial geometry

lun resize: max size: 65535m (68718428160)

Re: lun resize

lwei — Thu, 25 Aug 2011 20:27:35 GMT

Was the LUN created with the -o noreserve option? If not, the LUN has space-reservation enabled. And there may not be enough space to expand the LUN.

Wei

Re: lun resize

TDUBB1234 — Thu, 25 Aug 2011 20:36:42 GMT

vol options show

> vol options test

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

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

convert_ucode=off, maxdirsize=45875, 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=of

you mean fractional reserve?

Re: lun resize

lwei — Thu, 25 Aug 2011 20:43:18 GMT

yeah, there is also snapshot reserve. Do a "df -g" and "df -g -A". -Wei

Re: lun resize

TDUBB1234 — Thu, 25 Aug 2011 20:50:42 GMT

df -g

/vol/test/ 104GB 80GB 23GB 77% /vol/test/

/vol/test/.snapshot 25GB 0GB 25GB 0% /vol/test/.snapshot

df -g -A

test 8491GB 488GB 8003GB 6%

test/.snapshot 446GB 7GB 439GB 2%

Re: lun resize

TDUBB1234 — Thu, 25 Aug 2011 20:52:41 GMT

should i set the fractional reserve to 0?

Re: lun resize

lwei — Thu, 25 Aug 2011 21:01:03 GMT

Yeah, try that. BTW, what's the current LUN size? -Wei

Re: lun resize

TDUBB1234 — Thu, 25 Aug 2011 21:46:35 GMT

i changed fractional reserve to 0 on the volume but still cannot increase the lun size

Re: lun resize

TDUBB1234 — Thu, 25 Aug 2011 21:48:19 GMT

lun size is

/vol/test/test_qtr/test.lun 64.0g (68718428160) (r/w, online, mapped)

/vol/test/test_qtr/test1.lun 15.9g (17119051776) (r/w, online, mapped)

Re: lun resize

lwei — Thu, 25 Aug 2011 22:14:52 GMT

Was the LUN created with "-o noreserve" switch? The LUN may have space reservation enabled. Could you try a "lun show -v"? If the LUN has reservation enabled, you can turn it off by "lun set reservation <lun-path> disable" command. Then try the lun resize command again.

Thanks,

Wei

Re: lun resize

TDUBB1234 — Thu, 25 Aug 2011 22:20:24 GMT

ok i disabled space reservation but

resizing the lun still gives that error

lun resize: New size exceeds this LUN's initial geometry

lun resize: max size: 65535m (68718428160)

Re: lun resize

HENRYPAN2 — Thu, 25 Aug 2011 22:22:24 GMT

You may need to increase the volume size, then re-size the LUN under the volume.

Good luck

Henry

Re: lun resize

TDUBB1234 — Thu, 25 Aug 2011 22:25:55 GMT

i already increased the volume size

/vol/test/ 104GB 62GB 41GB 60% /vol/test/

/vol/test/.snapshot 25GB 0TB 25GB 0% /vol/test/.snapshot

/vol/test/test_qtr/test.lun 64.0g (68718428160) (r/w, online, mapped)

/vol/test/test_qtr/test1.lun 15.9g (17119051776) (r/w, online, mapped)

lun show -v /vol/test/test_qtr/test.lun

/vol/test/test_qtr/test.lun 64.0g (68718428160) (r/w, online, mapped)

Serial#: dfkpVZdQYdQ4

Share: none

Space Reservation: disabled

Multiprotocol Type: vmware

Maps: test=10

Occupied Size: 46.3g (49682784256)

Creation Time: Tue Jun 14 21:51:55 PDT 2011

Cluster Shared Volume Information: 0x0

Re: lun resize

TDUBB1234 — Fri, 26 Aug 2011 01:13:46 GMT

i was able to resize another lun under the same volume. just not this lun. any idea?

Re: lun resize

aborzenkov — Fri, 26 Aug 2011 03:05:03 GMT

What exactly is not clear in error message?

lun resize: New size exceeds this LUN's initial geometry

When LUN size is increased, LUN geometry (as returned to client) has to be adjusted. It is adjusted so that it remains compatible with old size and disk layout. This is not possible with new size you requested - geometry change may result in incompatible layout and client data corruption.

Re: lun resize

lwei — Fri, 26 Aug 2011 04:51:48 GMT

Can you run the command "lun maxsize <path>", where <path> is the volume or qtree path? You may need to eliminate the volume snapshot reserve.

Wei

Re: lun resize

TDUBB1234 — Fri, 26 Aug 2011 18:42:51 GMT

this is what I see

lun maxsize /vol/test

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

Without snapshot reserve: 58041m (60860399616)

With snapshot reserve: 58041m (60860399616)

With complete snapshot reserve: 29020m (30429675520)

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

Without snapshot reserve: 58031m (60850621440)

With snapshot reserve: 58031m (60850621440)

With complete snapshot reserve: 29015m (30425310720)

Re: lun resize

lwei — Fri, 26 Aug 2011 22:38:29 GMT

That's probably the reason why you can expand the LUN size. But I don't quite understand why with and without snapshot reserve the lun maxsize is the same. Which version of ONTAP are you using?

Thanks,

Wei