HELP ON RAID LAEVELS

[aixsupport]

Hi,

How can we find out the current running raid levels in our environment ?

Please give me the procedure for creating new raid levels
and also procedure for changing the current raid levels to another raid level.

Thanks in Advance
AIX SUPPORT

 

[sushveer]

Hi to find out existing raid levels...There are multiple considerations.If u have data on internal disks in aix
u can find by using
#lslv -m <logical_volume> and see the output under PV1,PV2..
columns
If u find on both the columns ...it is mirroring..may be two or 3 copies

If u have data storage on EMC disks,emc has its own utilities to determine raided data/fs...

This is just an idea...This is not absolute solution to your query...
As I am in office right now...I don't have time to give you
lengthy answer....I will give you some more input in my off hours...after 7pm today...

sushveer
IBM certified specialist-p-series AIX5L System Administration
AIX/SOLARIS/WEBSPHERE-MQ/TIVOLI Administrator

 

[aixsupport]

Hi,

Thanks for your response.

Please clearly explain about Local disks,EMC disks raid levels.

Thanks for spending your time on this.

Thanks
AIX support

 

[sushveer]

Hi aixsupport

IBM aix supports
raid0(striping),raid1(mirroring),raid3(stripes data one byte at a time across multiple disk drives ,parity stored on an ext drive),raid5(stripes sectors of data across multiple drives with the parity interleaved)and raid01(striping and mirroring)

if the data stored on internal scsi disk drives
You can find sotware perspective raid level by using the command syntax
#lslv -m <lv_name>
If u see values under PV1 and PV2 columns we can conclude
it is raid1.If u find values under PV1,PV2,PV3 columns mini
it is raid 0
There is no direct command to determine raid levels...
If you are using veritas volume manager then raid level
can be found by using command
#vxprint -ht
If the data is stored in EMC disks ...the emc has its own
The hardware level raid is different and provided by emc
raid technology and utilities/functions.And same thing hold good with hitachi hardware vendor.



sushveer
IBM certified specialist-p-series AIX5L System Administration
AIX/SOLARIS/WEBSPHERE-MQ/TIVOLI Administrator