Re: ASM and EMC PowerPath

From: "Radoulov, Dimitre" <cichomitiko@xxxxxxxxx>
To: "Leyi Zhang (Kamus)" <kamusis@xxxxxxxxx>
Date: Sun, 10 Apr 2011 11:13:51 +0200


Hi Leyi,
answers inline.

What my point is , since you can get this result:

# /etc/init.d/oracleasm querydisk -p BLOB
Disk "BLOB" is a valid ASM disk
/dev/sdam1: LABEL="BLOB" TYPE="oracleasm"
/dev/sdbc1: LABEL="BLOB" TYPE="oracleasm"
/dev/emcpowerz1: LABEL="BLOB" TYPE="oracleasm"

Then it means emcpower device was used when creatediesk.  Actually, no
matter what device name was used when createdisk, at least now your
"/dev/emcpowerz1" is recognized as ASM Disk BLOB. it's enough (If I'm
wrong please correct me).


Actually, that's what my original email is all about.

I see that the emcpower devices are recognized as asm disks,
I don't know if this is enough though ...

I suppose that querydisk just reports all devices/paths that point
to the physical disk. What I want to know is if asm is smart
enough to pick the emcpower device in this case or it
just uses the first one found (in ASCIIbetical order).

querydisk -d returns the major/minor of one of the physical paths
to the disk, not the emcpower path (I checked /proc/partitions for that),
that's why I think it actually doesn't use the logical devices.
I say "I think", because I'm not finding this anywhere in the docs for now.

Query disk typically is safe, you can modify "ORACLEASM_SCANORDER" and
"ORACLEASM_SCANEXCLUDE" when you get some downtime in database
maintenance window then restart ASM, if disk scanned is not an ASM
disk, will just simply raise an error, no data broken. (Of course,
backup your database first)


Thanks for the suggestion!
Yes, most likely we'll try this first.

BTW, can you post /proc/partitions content?


Yes,
I'm attaching the content of /proc/partitions.



Thank you!


Best regards
Dimitre

# node 1

# cat /proc/partitions
major minor  #blocks  name

 104     0   71649900 cciss/c0d0
 104     1     104391 cciss/c0d0p1
 104     2   71545477 cciss/c0d0p2
   8     0   31457280 sda
   8     1   31457264 sda1
   8    16   31457280 sdb
   8    17   31457264 sdb1
   8    32   31457280 sdc
   8    33   31457264 sdc1
   8    48   31457280 sdd
   8    49   31457264 sdd1
   8    64   31457280 sde
   8    65   31457264 sde1
   8    80   31457280 sdf
   8    81   31457264 sdf1
   8    96   31457280 sdg
   8    97   31457264 sdg1
   8   112   31457280 sdh
   8   113   31457264 sdh1
   8   128   52429440 sdi
   8   129   52428784 sdi1
   8   144   31457280 sdj
   8   145   31457264 sdj1
   8   160   31457280 sdk
   8   161   31457264 sdk1
   8   176   31457280 sdl
   8   177   31457264 sdl1
   8   192   31457280 sdm
   8   193   31457264 sdm1
   8   208   31457280 sdn
   8   209   31457264 sdn1
   8   224   31457280 sdo
   8   225   31457264 sdo1
   8   240   31457280 sdp
   8   241   31457264 sdp1
  65     0    2096640 sdq
  65     1    2095662 sdq1
  65    16    2096640 sdr
  65    17    2095662 sdr1
  65    32    2096640 sds
  65    33    2095662 sds1
  65    48    2096640 sdt
  65    49    2095662 sdt1
  65    64    2096640 sdu
  65    65    2095662 sdu1
  65    80    2096640 sdv
  65    81    2095662 sdv1
  65    96    2096640 sdw
  65    97    2095662 sdw1
  65   112    2096640 sdx
  65   113    2095662 sdx1
  65   128    2096640 sdy
  65   129    2095662 sdy1
  65   144    1048320 sdz
  65   145    1047339 sdz1
  65   160    5242560 sdaa
  65   161    5238597 sdaa1
  65   176    5242560 sdab
  65   177    5238597 sdab1
  65   192    5242560 sdac
  65   208   31457280 sdad
  65   209   31457264 sdad1
  65   224   31457280 sdae
  65   225   31457264 sdae1
  65   240   31457280 sdaf
  65   241   31457264 sdaf1
  66     0   31457280 sdag
  66     1   31457264 sdag1
  66    16   31457280 sdah
  66    17   31457264 sdah1
  66    32   31457280 sdai
  66    33   31457264 sdai1
  66    48   31457280 sdaj
  66    49   31457264 sdaj1
  66    64   31457280 sdak
  66    65   31457264 sdak1
  66    80   52429440 sdal
  66    81   52428784 sdal1
  66    96   31457280 sdam
  66    97   31457264 sdam1
  66   112   31457280 sdan
  66   113   31457264 sdan1
  66   128   31457280 sdao
  66   129   31457264 sdao1
  66   144   31457280 sdap
  66   145   31457264 sdap1
  66   160   31457280 sdaq
  66   161   31457264 sdaq1
  66   176   31457280 sdar
  66   177   31457264 sdar1
  66   192   31457280 sdas
  66   193   31457264 sdas1
  66   208    2096640 sdat
  66   209    2095662 sdat1
  66   224    2096640 sdau
  66   225    2095662 sdau1
  66   240    2096640 sdav
  66   241    2095662 sdav1
  67     0    2096640 sdaw
  67     1    2095662 sdaw1
  67    16    2096640 sdax
  67    17    2095662 sdax1
  67    32    2096640 sday
  67    33    2095662 sday1
  67    48    2096640 sdaz
  67    49    2095662 sdaz1
  67    64    2096640 sdba
  67    65    2095662 sdba1
  67    80    2096640 sdbb
  67    81    2095662 sdbb1
  67    96    1048320 sdbc
  67    97    1047339 sdbc1
  67   112    5242560 sdbd
  67   113    5238597 sdbd1
  67   128    5242560 sdbe
  67   129    5238597 sdbe1
  67   144    5242560 sdbf
 253     0   15728640 dm-0
 253     1   20971520 dm-1
 253     2    3145728 dm-2
 253     3    6291456 dm-3
 253     4    3145728 dm-4
  67   160    7843840 sdbg
  67   161    7839744 sdbg1
 120   128   52429440 emcpoweri
 120   129   52428784 emcpoweri1
 120   144   31457280 emcpowerj
 120   145   31457264 emcpowerj1
 120   160   31457280 emcpowerk
 120   161   31457264 emcpowerk1
 120   176   31457280 emcpowerl
 120   177   31457264 emcpowerl1
 120   192   31457280 emcpowerm
 120   193   31457264 emcpowerm1
 120   208   31457280 emcpowern
 120   209   31457264 emcpowern1
 120   224   31457280 emcpowero
 120   225   31457264 emcpowero1
 120   256    2096640 emcpowerq
 120   257    2095662 emcpowerq1
 120     0   31457280 emcpowera
 120     1   31457264 emcpowera1
 120   240   31457280 emcpowerp
 120   241   31457264 emcpowerp1
 120   272    2096640 emcpowerr
 120   273    2095662 emcpowerr1
 120    16   31457280 emcpowerb
 120    17   31457264 emcpowerb1
 120   288    2096640 emcpowers
 120   289    2095662 emcpowers1
 120    32   31457280 emcpowerc
 120    33   31457264 emcpowerc1
 120   304    2096640 emcpowert
 120   305    2095662 emcpowert1
 120    48   31457280 emcpowerd
 120    49   31457264 emcpowerd1
 120   320    2096640 emcpoweru
 120   321    2095662 emcpoweru1
 120    64   31457280 emcpowere
 120    65   31457264 emcpowere1
 120   336    2096640 emcpowerv
 120   337    2095662 emcpowerv1
 120    80   31457280 emcpowerf
 120    81   31457264 emcpowerf1
 120   352    2096640 emcpowerw
 120   353    2095662 emcpowerw1
 120    96   31457280 emcpowerg
 120    97   31457264 emcpowerg1
 120   368    2096640 emcpowerx
 120   369    2095662 emcpowerx1
 120   112   31457280 emcpowerh
 120   113   31457264 emcpowerh1
 120   384    2096640 emcpowery
 120   385    2095662 emcpowery1
 120   400    1048320 emcpowerz
 120   401    1047339 emcpowerz1
 120   416    5242560 emcpoweraa
 120   417    5238597 emcpoweraa1
 120   432    5242560 emcpowerab
 120   433    5238597 emcpowerab1
 120   448    5242560 emcpowerac
 253     5    5238784 dm-5

# node 2


[root@eserver04b ~]# cat /proc/partitions
major minor  #blocks  name

 104     0   71649900 cciss/c0d0
 104     1     104391 cciss/c0d0p1
 104     2   68605582 cciss/c0d0p2
 104    16  430025112 cciss/c0d1
 104    17  430023824 cciss/c0d1p1
   8     0   31457280 sda
   8     1   31457264 sda1
   8    16   31457280 sdb
   8    17   31457264 sdb1
   8    32   31457280 sdc
   8    33   31457264 sdc1
   8    48   31457280 sdd
   8    49   31457264 sdd1
   8    64   31457280 sde
   8    65   31457264 sde1
   8    80   31457280 sdf
   8    81   31457264 sdf1
   8    96   31457280 sdg
   8    97   31457264 sdg1
   8   112   31457280 sdh
   8   113   31457264 sdh1
   8   128   52429440 sdi
   8   129   52428784 sdi1
   8   144   31457280 sdj
   8   145   31457264 sdj1
   8   160   31457280 sdk
   8   161   31457264 sdk1
   8   176   31457280 sdl
   8   177   31457264 sdl1
   8   192   31457280 sdm
   8   193   31457264 sdm1
   8   208   31457280 sdn
   8   209   31457264 sdn1
   8   224   31457280 sdo
   8   225   31457264 sdo1
   8   240   31457280 sdp
   8   241   31457264 sdp1
  65     0    2096640 sdq
  65     1    2095662 sdq1
  65    16    2096640 sdr
  65    17    2095662 sdr1
  65    32    2096640 sds
  65    33    2095662 sds1
  65    48   31457280 sdt
  65    49   31457264 sdt1
  65    64    2096640 sdu
  65    65    2095662 sdu1
  65    80   31457280 sdv
  65    81   31457264 sdv1
  65    96   31457280 sdw
  65    97   31457264 sdw1
  65   112    2096640 sdx
  65   113    2095662 sdx1
  65   128   31457280 sdy
  65   129   31457264 sdy1
  65   144   31457280 sdz
  65   145   31457264 sdz1
  65   160    2096640 sdaa
  65   161    2095662 sdaa1
  65   176   31457280 sdab
  65   177   31457264 sdab1
  65   192   31457280 sdac
  65   193   31457264 sdac1
  65   208    2096640 sdad
  65   209    2095662 sdad1
  65   224   31457280 sdae
  65   225   31457264 sdae1
  65   240    2096640 sdaf
  65   241    2095662 sdaf1
  66     0   52429440 sdag
  66     1   52428784 sdag1
  66    16   31457280 sdah
  66    17   31457264 sdah1
  66    32    2096640 sdai
  66    33    2095662 sdai1
  66    48   31457280 sdaj
  66    49   31457264 sdaj1
  66    64   31457280 sdak
  66    65   31457264 sdak1
  66    80   31457280 sdal
  66    81   31457264 sdal1
  66    96    1048320 sdam
  66    97    1047339 sdam1
  66   112   31457280 sdan
  66   113   31457264 sdan1
  66   128   31457280 sdao
  66   129   31457264 sdao1
  66   144    5242560 sdap
  66   145    5238597 sdap1
  66   160   31457280 sdaq
  66   161   31457264 sdaq1
  66   176    2096640 sdar
  66   177    2095662 sdar1
  66   192    5242560 sdas
  66   193    5238597 sdas1
  66   208    2096640 sdat
  66   209    2095662 sdat1
  66   224    2096640 sdau
  66   225    2095662 sdau1
  66   240    5242560 sdav
  67     0    2096640 sdaw
  67     1    2095662 sdaw1
  67    16    2096640 sdax
  67    17    2095662 sdax1
  67    32    2096640 sday
  67    33    2095662 sday1
  67    48    2096640 sdaz
  67    49    2095662 sdaz1
  67    64    2096640 sdba
  67    65    2095662 sdba1
  67    80    2096640 sdbb
  67    81    2095662 sdbb1
  67    96    1048320 sdbc
  67    97    1047339 sdbc1
  67   112    5242560 sdbd
  67   113    5238597 sdbd1
  67   128    5242560 sdbe
  67   129    5238597 sdbe1
  67   144    5242560 sdbf
 253     0   15728640 dm-0
 253     1    3145728 dm-1
 253     2   20971520 dm-2
 253     3    6291456 dm-3
 253     4    3145728 dm-4
  67   160    7843840 sdbg
  67   161    7839744 sdbg1
 253     5  430022656 dm-5
 120   128   52429440 emcpoweri
 120   129   52428784 emcpoweri1
 120   144   31457280 emcpowerj
 120   145   31457264 emcpowerj1
 120   160   31457280 emcpowerk
 120   161   31457264 emcpowerk1
 120   176   31457280 emcpowerl
 120   177   31457264 emcpowerl1
 120   192   31457280 emcpowerm
 120   193   31457264 emcpowerm1
 120   208   31457280 emcpowern
 120   209   31457264 emcpowern1
 120   224   31457280 emcpowero
 120   225   31457264 emcpowero1
 120   256    2096640 emcpowerq
 120   257    2095662 emcpowerq1
 120     0   31457280 emcpowera
 120     1   31457264 emcpowera1
 120   240   31457280 emcpowerp
 120   241   31457264 emcpowerp1
 120   272    2096640 emcpowerr
 120   273    2095662 emcpowerr1
 120    16   31457280 emcpowerb
 120    17   31457264 emcpowerb1
 120   288    2096640 emcpowers
 120   289    2095662 emcpowers1
 120    32   31457280 emcpowerc
 120    33   31457264 emcpowerc1
 120   304    2096640 emcpowert
 120   305    2095662 emcpowert1
 120    48   31457280 emcpowerd
 120    49   31457264 emcpowerd1
 120   320    2096640 emcpoweru
 120   321    2095662 emcpoweru1
 120    64   31457280 emcpowere
 120    65   31457264 emcpowere1
 120   336    2096640 emcpowerv
 120   337    2095662 emcpowerv1
 120    80   31457280 emcpowerf
 120    81   31457264 emcpowerf1
 120   352    2096640 emcpowerw
 120   353    2095662 emcpowerw1
 120    96   31457280 emcpowerg
 120    97   31457264 emcpowerg1
 120   368    2096640 emcpowerx
 120   369    2095662 emcpowerx1
 120   112   31457280 emcpowerh
 120   113   31457264 emcpowerh1
 120   384    2096640 emcpowery
 120   385    2095662 emcpowery1
 120   400    1048320 emcpowerz
 120   401    1047339 emcpowerz1
 120   416    5242560 emcpoweraa
 120   417    5238597 emcpoweraa1
 120   432    5242560 emcpowerab
 120   433    5238597 emcpowerab1
 120   448    5242560 emcpowerac

Follow-Ups:
- Re: ASM and EMC PowerPath
  - From: Radoulov, Dimitre
- Re: ASM and EMC PowerPath
  - From: goran bogdanovic

References:
- ASM and EMC PowerPath
  - From: Radoulov, Dimitre
- RE: ASM and EMC PowerPath
  - From: Martin Bach
- Re: ASM and EMC PowerPath
  - From: Radoulov, Dimitre
- RE: ASM and EMC PowerPath
  - From: Martin Bach
- Re: ASM and EMC PowerPath
  - From: Radoulov, Dimitre
- Re: ASM and EMC PowerPath
  - From: Radoulov, Dimitre
- Re: ASM and EMC PowerPath
  - From: Andrew Kerber
- Re: ASM and EMC PowerPath
  - From: Radoulov, Dimitre
- Re: ASM and EMC PowerPath
  - From: Leyi Zhang (Kamus)
- Re: ASM and EMC PowerPath
  - From: Radoulov, Dimitre

Re: ASM and EMC PowerPath

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