Disk access name "emc1_00dc" refers to an EMC BCV lun, which is a cloned image of an EMC SRDF "R2" lun.


SRDF "DR" SERVER: Bashful



Bashful # vxdisk -e list emc1_00dc emc1_0072
DEVICE       TYPE           DISK        GROUP        STATUS               OS_NATIVE_NAME   ATTR
emc1_00dc    auto:cdsdisk   -            -           online udid_mismatch c1t5006048C536979A0d80s2 bcv

DEVICE       TYPE           DISK        GROUP        STATUS               OS_NATIVE_NAME   ATTR
emc1_0072    auto:cdsdisk   -            -           online udid_mismatch c1t5006048C536979A0d65s2 srdf-r2




The hostid needs to be cleared from the BCV lun, in order for the UDID related content to be updated by the "vxdisk updateudid " command:


Bashful # vxdisk updateudid emc1_00dc
VxVM vxdisk ERROR V-5-1-12201 Device updateudid failed: Disk is in use by another host


In this instance the BCV LUN has a hostid of "Dopey" which relates to the EMC SRDF "R1" LUN presented to the production server.


Bashful # vxdisk list emc1_00dc
Device:    emc1_00dc
devicetag: emc1_00dc
type:      auto
hostid:    Dopey                                                                       <<<< This is the hostid from the SRDF "R1" lun on the production host "Dopey".
disk:      name= id=1298306345.49.Dopey
group:     name=DopeyDg id=1298306534.57.Dopey
info:      format=cdsdisk,privoffset=256,pubslice=2,privslice=2
flags:     online ready private autoconfig udid_mismatch autoimport
pubpaths:  block=/dev/vx/dmp/emc1_00dcs2 char=/dev/vx/rdmp/emc1_00dcs2
guid:      {18a89e34-1dd2-11b2-94fe-0003baa8421b}
udid:      EMC%5FSYMMETRIX%5F000290301414%5F60060480000290301414533030304443
site:      -
version:   3.1
iosize:    min=512 (bytes) max=2048 (blocks)
public:    slice=2 offset=65792 len=4058368 disk_offset=0
private:   slice=2 offset=256 len=65536 disk_offset=0
update:    time=1298546897 seqno=0.14
ssb:       actual_seqno=0.0
headers:   0 240
configs:   count=1 len=48144
logs:      count=1 len=7296
Defined regions:
 config   priv 000048-000239[000192]: copy=01 offset=000000 enabled
 config   priv 000256-048207[047952]: copy=01 offset=000192 enabled
 log      priv 048208-055503[007296]: copy=01 offset=000000 enabled
 lockrgn  priv 055504-055647[000144]: part=00 offset=000000
Multipathing information:
numpaths:   1
c1t5006048C536979A0d80s2        state=enabled



How to clear the "hostid" value for the BCV lun "emc1_00dc"


Bashful # vxdisk clearimport  emc1_00dc


Bashful # vxdisk -v list emc1_00dc
Device:    emc1_00dc
devicetag: emc1_00dc
type:      auto
hostid:                                                                                       <<< The hostid value has been cleared
disk:      name= id=1298306345.49.Dopey
group:     name=DopeyDg id=1298306534.57.Dopey
info:      format=cdsdisk,privoffset=256,pubslice=2,privslice=2
flags:     online ready private autoconfig udid_mismatch
pubpaths:  block=/dev/vx/dmp/emc1_00dcs2 char=/dev/vx/rdmp/emc1_00dcs2
guid:      {18a89e34-1dd2-11b2-94fe-0003baa8421b}
udid:      EMC%5FSYMMETRIX%5F000290301414%5F60060480000290301414533030304443
site:      -
version:   3.1
iosize:    min=512 (bytes) max=2048 (blocks)
public:    slice=2 offset=65792 len=4058368 disk_offset=0
private:   slice=2 offset=256 len=65536 disk_offset=0
update:    time=1298547055 seqno=0.16
ssb:       actual_seqno=0.0
headers:   0 240
configs:   count=1 len=48144
logs:      count=1 len=7296
Defined regions:
 config   priv 000048-000239[000192]: copy=01 offset=000000 enabled
 config   priv 000256-048207[047952]: copy=01 offset=000192 enabled
 log      priv 048208-055503[007296]: copy=01 offset=000000 enabled
 lockrgn  priv 055504-055647[000144]: part=00 offset=000000
Annotations:
 tag      udid_asl=EMC%5FSYMMETRIX%5F000290300822%5F60060480000290300822533030303843
Multipathing information:
numpaths:   1
c1t5006048C536979A0d80s2        state=enabled

Now the "hostid" has been cleared the UDID value can be updated


Bashful # vxdisk updateudid emc1_00dc


Validating that the on-disk UDID value changes


Bashful # vxdisk -v list emc1_00dc
Device:    emc1_00dc
devicetag: emc1_00dc
type:      auto
hostid:
disk:      name= id=1298306345.49.Dopey
group:     name=DopeyDg id=1298306534.57.Dopey
info:      format=cdsdisk,privoffset=256,pubslice=2,privslice=2
flags:     online ready private autoconfig clone_disk
pubpaths:  block=/dev/vx/dmp/emc1_00dcs2 char=/dev/vx/rdmp/emc1_00dcs2
guid:      {18a89e34-1dd2-11b2-94fe-0003baa8421b}
udid:      EMC%5FSYMMETRIX%5F000290301414%5F60060480000290301414533030304443   <<<< UDID value from the DDL (Device Discovery layer)
site:      -
version:   3.1
iosize:    min=512 (bytes) max=2048 (blocks)
public:    slice=2 offset=65792 len=4058368 disk_offset=0
private:   slice=2 offset=256 len=65536 disk_offset=0
update:    time=1298547203 seqno=0.19
ssb:       actual_seqno=0.0
headers:   0 240
configs:   count=1 len=48144
logs:      count=1 len=7296
Defined regions:
 config   priv 000048-000239[000192]: copy=01 offset=000000 enabled
 config   priv 000256-048207[047952]: copy=01 offset=000192 enabled
 log      priv 048208-055503[007296]: copy=01 offset=000000 enabled
 lockrgn  priv 055504-055647[000144]: part=00 offset=000000
Annotations:
 tag      udid_asl=EMC%5FSYMMETRIX%5F000290301414%5F60060480000290301414533030304443            << The on-disk UDID
Multipathing information:
numpaths:   1
c1t5006048C536979A0d80s2        state=enabled
 

 

 

Following the UDID update, both the DDL and on-disk UDID values are now in sync.



BCV diskgroup import syntax


The BCV VxVM diskgroup image of the SRDF "R2" lun can be imported using the following syntax.


# vxdg -Cfn bcv_DopeyDg -o useclonedev=on -o updateid import DopeyDg



Storage Foundation 5.1


Note: Solaris 8 support withdrawn for Storage Foundation 5.1