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4817
Disk group in VMAX
Hello,
I am preety new to VMAX environment. I am trying to do some device allocation/creation in VMAX with the help of an AIX host in a LAB environment.
I have already created a thin pool and when I try to create a data devices to add to the pool, i get a 'no disk group present' message:
symconfigure -sid 26 -cmd "create dev count=2 , size=10000 CYL,emulation=FBA, in pool lpar1 member_state=enable config=RAID-5, data_member_count=2, attribute=datadev;" commit
Execute a symconfigure operation for symmetrix '000192604026' (y/ ) ? y
A Configuration Change operation is in progress. Please wait...
Establishing a configuration change session...............Established.
Error occurred while Defining change number 1:
Disk group is required for this operation
Terminating the configuration change session..............Done.
The configuration change session has failed.
Can anyone please help out on how to create the disk group for the above VMAX array ? Also, please share a step by step info on the device allocation for the AIX host. from the below output, can i confirm that my AIX HBA WWN is logging into the symmtrix arraay sid 26 :
ibm-520-4-lpar1# symmask list hba
Identifier Type Adapter Physical Device Path Dir:P
---------------- ----- ---------------- ------------------------ -----
c05076004ec00000 Fibre 15-T1 /dev/rhdisk40 07G:0
c05076004ec00002 Fibre 17-T1 /dev/rhdisk111 07G:0
ibm-520-4-lpar1# symmask -sid 26 list logins|grep -i C05076004EC00000
c05076004ec00000 Fibre NULL NULL 073b0a Yes Yes
c05076004ec00000 Fibre NULL NULL 073b0a Yes Yes
ibm-520-4-lpar1# symmask -sid 26 list logins|grep -i C05076004EC00002
c05076004ec00002 Fibre NULL NULL 073909 Yes Yes
c05076004ec00002 Fibre NULL NULL 073909 Yes Yes
please suggest ?
sauravrohilla
859 Posts
0
September 19th, 2011 10:00
If you wish to create raid 5 (3+1) device then give data_member_count=3 and 7 if you are creating raid 5 (7+1).
regards,
Saurabh
SKT2
1.3K Posts
0
September 19th, 2011 10:00
try data_member_count=3 ( 3 devices for minimum for raid 5)
SKT2
1.3K Posts
0
September 19th, 2011 10:00
you r probaly missing the `disk_group=x ` argument
Quincy561
1.3K Posts
0
September 19th, 2011 10:00
Since there seems to be only one disk group in the Symmetrix, do you have to specify that in the command line?
RFritz11
244 Posts
0
September 19th, 2011 10:00
Hello,
We've moved your question to the Symmetrix Support Forums Community where your question should be addressed promptly. Kind regards.
SKT2
1.3K Posts
0
September 19th, 2011 10:00
can u post `symdisk list -dskgrp_summary`
Jill_M
86 Posts
0
September 19th, 2011 10:00
Hello,
The team is going to move this thread to the Support Forums Community where your question can be addressed.
Kind regards,
Jill
sumit_ghosh
25 Posts
0
September 19th, 2011 10:00
ibm-520-4-lpar1# symdisk list -dskgrp_summary
Symmetrix ID: 000192604026
Disk Group Disk Capacity
---------------------- ----------------------- --------------------------------
Speed Size Total Free Actual
Num Name Cnt Tech (RPM) (MB) (MB) (MB) (MB)
---------------------- ----------------------- --------------------------------
1 DISK_GROUP_001 120 FC 15000 418710 50245254 39847781 50245254
---------- ---------- ----------
Total 50245254 39847781 50245254
when i give the disk group as 1 and try to commit, it gives the below error :
ibm-520-4-lpar1# symconfigure -sid 26 -cmd "create dev count=2 , size=10000 CYL,emulation=FBA, in pool lpar1 member_state=enable config=RAID-5, data_member_count=2, attribute=datadev disk_group=1;" commit
Execute a symconfigure operation for symmetrix '000192604026' (y/ ) ? y
A Configuration Change operation is in progress. Please wait...
Establishing a configuration change session...............Established.
Error occurred while Defining change number 1:
Invalid data member count supplied in create dev request see SYMAPI log file for more details
Terminating the configuration change session..............Done.
The configuration change session has failed.
SKT2
1.3K Posts
0
September 19th, 2011 11:00
first message said " disk group number" required; second one said invalid data_member_count; I am thinking this particula code level may be only suporting a specific geomery like 3+1 or 7+1; so if that is true then 2+1 will not work
Quincy561
1.3K Posts
1
September 19th, 2011 11:00
Symmetrix only supports 3+1 and 7+1 for RAID5 and 6+2 and 14+2 for RAID6. There are no other options on any code level.
Anonymous User
2 Posts
0
March 5th, 2015 22:00
Hello Sumit,
You have to choose data_member_count=3 if you are planning for RAID-5 or you can also choose count=7.
Fully agree with Quincy56 responce. : Symmetrix only supports 3+1 and 7+1 for RAID5 and 6+2 and 14+2 for RAID6. There are no other options on any code level.
you can try:
symconfigure -sid 26 -cmd "create dev count=2 , size=10000 CYL,emulation=FBA, in pool lpar1 member_state=enable config=RAID-5, data_member_count=3, attribute=datadev disk_group=1;" preview
Once validated then go for commit.
It should work for you as well.
Thanks,
Roop Bhardwaj