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Go to SolutionUnmapped BCV's
i have lot of devices of BCV Type which are under unmapped category ( bcv devices , bcv meta devices , bcv meta R1 devices )
and also i have bcv devices under mapped category..we are using TimeFinder/ SRDF for DR ..
1. i am wonder those devices which are under unmapped are ready to use for future ??? or those are currenty under use ??? ..
2. say if dev01 is attached to FA 13A -p 1 so the associated bcv for that standard device dev01 need to be mapped to same FA or no need
3.even can we change those device protection type like from BCV --> Raid ..
thank you...
and also i have bcv devices under mapped category..we are using TimeFinder/ SRDF for DR ..
1. i am wonder those devices which are under unmapped are ready to use for future ??? or those are currenty under use ??? ..
2. say if dev01 is attached to FA 13A -p 1 so the associated bcv for that standard device dev01 need to be mapped to same FA or no need
3.even can we change those device protection type like from BCV --> Raid ..
thank you...
502
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Posted January 4th, 2008 13:00
ok...if we planned to implement Timefinder/SRDF for new aix host
for that if i create a device group then which BCV devices do i need to pick from
those bcv list because if they are not mapped to FA the symdev XXXX -noport will give us
big lit of bcv's how can we determine which are currently under use or which are available (free )..
thank you.....502
1
Posted January 4th, 2008 13:00
if you want to list bcv devices that are not mapped to any FA ..you can run symdev list -sid 123 -bcv -noport ...but as you know ..you don't have to have BCV mapped to FAs in order to use them.502
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Posted January 4th, 2008 14:00
if you know a little korn/bash ..you can assign output from symdev list -sid 123 -bcv -noport to a variable ...and then run it through a loop with symdev show -sid 123 #devicename ...and grep for either "Time of Last BCV Action" or "State of Pair ( STD BCV )"
Time of last BCV will tell you when it was last use ...maybe you can determine by date that something was used long time ago ..but not anymore. And State of pair may return "NeverEstab" ..which means that BCV was never used at all.502
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Posted January 4th, 2008 14:00
You have also "symbcv -sid xxx list" that will show you the status for every BCV device ..
As you said, grep[ping] -i for NeverEst will show you the list of bcv never established ..
symbcv will show you also the meta-members so maybe you have to filter further the output of symbcv list to have only meta heads ..502
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Posted January 4th, 2008 14:00
what do you typically do you in shop ..do you map BCVs to FA or do you not map BCVs ?502
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Posted January 4th, 2008 16:00
yes ..by those commands i can figure it out some of them are showing never established & time of last BCV action N/A .so those are available BCVs for future ...i have one doubt , if standard dev & local BCV is of size 9 Gig then remote (R2)standard dev & R2 bcvs should be in same or bigger size right ..
so at any time all these four devices should have same data and of same size, exactly like mirroring...right
thank you..502
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Posted January 4th, 2008 16:00
once we assign a LUN from EMC to aix host and after we config with powerpath it shown up like hdiskpower# , how to find out the relationship between hdiskpower# is devise XXX in symmetrix.. like which device is associated with which hdiskpower#...
thank you....349
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Posted January 5th, 2008 05:00
yes ..by those commands i can figure it out some of
them are showing never established & time of last BCV
action N/A .so those are available BCVs for future
...i have one doubt , if standard dev & local BCV
is of size 9 Gig then remote (R2)standard dev & R2
bcvs should be in same or bigger size right ..
so at any time all these four devices should have
same data and of same size, exactly like
mirroring...right
thank you..
that's correct, starting with microcode 69, R2 can be larger than R1. I would look at Solution Enabler guide to check the restrictions when using R2 that are larger than R1 ..for example you can not use concatenated metas ..only striped.420
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Posted January 5th, 2008 05:00
on host install Solutions enabler and run sympd list -sid XXX or if if you can not install SE ..then download inq utility and run it, you will see something like this:./inq.aix64_51 -sym_wwn Symmetrix Device Symm Serial # Device # WWN ----------------------------------------------------------------------------- /dev/rhdiskpower0 000011122233 0862 60060480000011122233424f42383632 /dev/rhdiskpower1 000011122233 055C 60060480000011122233424f42353543 /dev/rhdiskpower2 000011122233 055D 60060480000011122233424f42353544 /dev/rhdiskpower3 000011122233 055E 60060480000011122233424f42353545 /dev/rhdiskpower4 000011122233 055F 60060480000011122233424f42353546 /dev/rhdiskpower5 000011122233 0560 60060480000011122233424f42353630 /dev/rhdiskpower6 000011122233 0561 60060480000011122233424f42353631 /dev/rhdiskpower7 000011122233 05C1 60060480000011122233424f42354331 /dev/rhdiskpower8 000011122233 05C2 60060480000011122233424f42354332 /dev/rhdiskpower9 000011122233 05C3 60060480000011122233424f42354333
so device column shows you your device id and which rhdiskpower# it's associated to.
xe2sdc
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502
0
Posted January 4th, 2008 13:00
unmapped are ready to use for future ??? or those are
currenty under use ??? ..
As Mr Dynamox said, a BCV is always a BCV .. it's always available in case you need to establish it. Sometimes customer prefer NOT to map BCV devices to be completly sure that their content will never ever be touched from someone ..
associated bcv for that standard device dev01 need to
be mapped to same FA or no need
See above .. no need
like from BCV --> Raid ..
If the devices are already BCV+R-5 then YES you can convert them to RAID-5 devices .. If the BCV are unprotected BCV or 2-way-mir BCV then the quick answer is NO, the complex answer is yes but with care
thank you...