topic Re: SMO & RMAN in Data Protection

SMO & RMAN

marditsa — Thu, 05 Jun 2025 07:20:43 GMT

Hi everybody!

this is about SMO 3.0.2 backing up Oracle 11g ASM (OS is LINUX 5.3) SMO backup completes successfully without RMAN. With RMAN though (either control file or recovery catalog) it fails, and this seems to be because it has to connect to the snapshot.

To be more specific SMO creates the snapshot successfully and connects to it creating a device in the form of /dev/mapper/mpathXX. But then it tries to chown another device name (/dev/mapper/mapperXX), which does not exist and it fails.

Does anybody know why SMO picks the wrong device name? is this related to SDU or MPIO , probably not configured correctly ?

Thank you in advance!

Marditsa

Re: SMO & RMAN

neto — Tue, 08 Dec 2009 18:25:07 GMT

Hi Marditsa

This is neto from Brazil

How are you?

Could you please send the output from:

snapdrive storage show -dev

sanlun lun show

cat /etc/multipath.conf

TIA

All the best

neto

Re: SMO & RMAN

marditsa — Tue, 08 Dec 2009 18:58:08 GMT

Hi Neto! thank you for your prompt responce ! I have the following stored in my laptop. In the morning (local time 🙂 will be able to access the system and will send you additional info.

snapdrive storage show -dev (after it connects to the snapshot lun)

Connected LUNs and devices:

device filename    adapter path size proto state clone      lun path   backing snapshot
----------------    ------- ---- ---- ----- ----- -----      --------   ----------------
/dev/mapper/ora_asm_data11g           -   P     20g              fcp online No         kouvas2:/vol/loulaDATA/lun0        -
/dev/mapper/ora_asm_fra11g              -   P     30g              fcp online No         kouvas2:/vol/loulaFRA/lun0         -
/dev/mapper/ora_ocr                            -   P     2g                fcp online No         kouvas2:/vol/loulaOCR/lun0         -
/dev/mapper/oraclehome                     -   P     35.0g           fcp online No         kouvas2:/vol/artziu01/lun0         -
/dev/mapper/ora_voting                       -   P     2g               fcp online No         kouvas2:/vol/loulaVOTING/lun0      -
/dev/mapper/mpath43                           -   P     22g            fcp online lun-clone kouvas2:/vol/loulaFRA10g/lun0_20091116163352733_0 .snapshot/smo_dekag_dekag1_f20091116smo__h_1_4028825224fd692a0124fd692d510001_0/lun0
/dev/mapper/ora_asm_data10g           -   P     22g              fcp online No         kouvas2:/vol/loulaFRA10g/lun0      -
/dev/mapper/ora_asm_fra10g              -   P     22g              fcp online No         kouvas2:/vol/loulaDATA10g/lun0

multipath.conf :

defaults {

user_friendly_names yes

max_fds max

queue_without_daemon no

}

blacklist {

wwid <DevId>

devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"

devnode "^hd[a-z]"

devnode "^sda$"

devnode "^cciss!c[0-9]d[0-9]*[p[0-9]*]"

}

devices {

device {

vendor "NETAPP"

product "LUN"

getuid_callout "/sbin/scsi_id -g -u -s /block/%n"

prio_callout "/sbin/mpath_prio_ontap /dev/%n"

features "1 queue_if_no_path"

hardware_handler "0"

path_grouping_policy group_by_prio

failback immediate

rr_weight uniform

rr_min_io 128

path_checker directio

flush_on_last_del yes

}

multipaths {

multipath {

wwid 360a98000486e5463644a536c43666d67

alias oraclehome

}

multipath {

wwid 360a98000486e5463644a536c43744337

alias ora_asm_data11g

}

multipath {

wwid 360a98000486e5463644a536c4375584a

alias ora_asm_fra11g

}

multipath {

wwid 360a98000486e5463644a536c43776a37

alias ora_voting

}

multipath {

wwid 360a98000486e5463644a536c4376704c

alias ora_ocr

}

multipath {

wwid 360a98000486e5463644a536f77584764

alias ora_asm_data10g

}

multipath {

wwid 360a98000486e5463644a536f77564975

alias ora_asm_fra10g

}

multipath {

wwid 360a98000486e5463644a542d36356b55

alias ora_asm_data_testdb

}

multipath {

wwid 360a98000486e5463644a542d36385832

alias ora_asm_fra_testdb

}

multipath {

wwid 360a98000486e5463644a542d362d5634

alias ora_asm_onlinelog_testdb_dest1

}

multipath {

wwid 360a98000486e5463644a542d36397553

alias ora_asm_onlinelog_testdb_dest2

path_grouping_policy failover

}

multipath {

wwid 360a98000486e5463644a54414f4c6d57

alias ora_asm_spfile_testdb

}

Thank you again Neto !

Re: SMO & RMAN

neto — Tue, 08 Dec 2009 19:01:37 GMT

user_friendly_names yes

This is not supported by SDU

Change to no (please comment the alias as well)

Restart multipath and sdu

snapdrive storage show -dev needs to show /dev/mapper/123455 (hash id)

Pls let me know

neto

Re: SMO & RMAN

marditsa — Tue, 08 Dec 2009 19:11:09 GMT

OK neto thanks ! will try this out and will let you know... have a nice day!

Re: SMO & RMAN

stanton — Wed, 09 Dec 2009 16:49:40 GMT

The aliases set up at the bottom of the file may also be contributing. You may need to also remove the aliases and restart multipathing and then restart snapdrived.

example:

multipaths {

multipath {

wwid 360a98000486e5463644a536c43666d67

alias oraclehome

}

Re: SMO & RMAN

marditsa — Wed, 09 Dec 2009 17:53:17 GMT

Yes thank you I will try this. Our configuration includes RAC, and it was configured with the user-friendly-names and the aliases. So it wont start without those. I have to drop RAC, change multipath.conf and reconfigure RAC, then test SMO again... will see how this goes. Thank you again

Re: SMO & RMAN

windhellas — Mon, 14 Dec 2009 14:44:41 GMT

Hi Neto,

we changed multipath.conf and it works now. This is how it looks like :

defaults {

user_friendly_names no

max_fds max

queue_without_daemon no

}

blacklist {

wwid <DevId>

devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"

devnode "^hd[a-z]"

devnode "^sda$"

devnode "^cciss!c[0-9]d[0-9]*[p[0-9]*]"

}

devices {

device {

vendor "NETAPP"

product "LUN"

getuid_callout "/sbin/scsi_id -g -u -s /block/%n"

prio_callout "/sbin/mpath_prio_ontap /dev/%n"

features "1 queue_if_no_path"

hardware_handler "0"

path_grouping_policy group_by_prio

failback immediate

rr_weight uniform

rr_min_io 128

path_checker directio

flush_on_last_del yes

}

Thank you very much for your help !

Re: SMO & RMAN

marditsa — Mon, 14 Dec 2009 14:57:27 GMT

Hi Neto,

we changed multipath.conf and it works now. This is how it looks like :

defaults {

user_friendly_names no

max_fds max

queue_without_daemon no

}

blacklist {

wwid <DevId>

devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"

devnode "^hd[a-z]"

devnode "^sda$"

devnode "^cciss!c[0-9]d[0-9]*[p[0-9]*]"

}

devices {

device {

vendor "NETAPP"

product "LUN"

getuid_callout "/sbin/scsi_id -g -u -s /block/%n"

prio_callout "/sbin/mpath_prio_ontap /dev/%n"

features "1 queue_if_no_path"

hardware_handler "0"

path_grouping_policy group_by_prio

failback immediate

rr_weight uniform

rr_min_io 128

path_checker directio

flush_on_last_del yes

}

Thank you very much for your help !

Re: SMO & RMAN

neto — Mon, 14 Dec 2009 15:08:36 GMT

Hi my friend

This is neto from Brazil

How are you?

I'm very happy that is working now.

Please let me know if you need any other help.

Count on me for all.

All the best

neto

NetApp - I love this company!

Re: SMO & RMAN

neto — Mon, 14 Dec 2009 15:09:37 GMT

Hi Marditsa,

This is neto from Brazil

How are you?

I'm very happy that is working now.

Please let me know if you need any other help.

Count on me for all.

All the best

neto

NetApp - I love this company!