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8/9/2019 Sym Metrix
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SYMMETRIX
EMC Symmetrix: VCMDB and ACLX
VCMDB:Volume Control Manager Database
ACLX:Access Control Logix
VCM:Volume Control Manager device (where the database resides)
VCM Gatekeeper:Volume Control Manager Gatekeeper (database doesnt reside on these devices)
SFS Volumes:!"mmetrix #ile !"stem Volumes
$% "ou work with &MC !"mmetrix s"stems' "ou know the importance o% VCMD $ntroduced with !"mmetrix *+ and
used in ever" generation a%ter that' VCMD stands %or Volume Control Manager Database) Also in the latest
generation o% s"stems the VCM device is at times also re%erenced as VCM Gatekeeper
VCMD is a relativel" small device that is created on the !"mmetrix s"stem that allows %or hosts access to various
devices on the !"mmetrix VCMD keeps an inventor" o% which devices have access to which host (,As) -ithout a
VCMD in place' host s"stems will not be able to access the !"mmetrix .he VCMD should be backed up on regular
intervals and would be help%ul in a rain" da"
.he VCMD device si/e grew along with new generations o% !"mmetrix s"stems that got introduced' primaril" a means
to keep a track o% more supported devices (h"pers 0 splits) on these plat%orms -ith the introduction o% !"mmetrix V1
Max' the VCMD concept is now a bit changed to ACL2 (Access Control Logix) Access Logix is being used on the
Clariion s"stems %or "ears now
Here are a e! t"in#s to $onsider !it" VCMDB
3n the older !"mmetrix s"stems (*+' *4' 5+ and 55)' the VCMD (device) is mapped to all the channels'
host
$n these s"stems the VCMD access is t"picall" restricted b" Volume Logix or ACL (access control lists)
-ith the !"mmetrix DM2' DM26 !"stems 7 &nginuit" Code 589+' 589: the VCM device onl" re;uires to be
mapped to the Management stations
Management stations include !
8/9/2019 Sym Metrix
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8/9/2019 Sym Metrix
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$% the device c"linder si/e is e;ual with a conversion "ou are attempting' the %ollowing will help "ou convert
"our VCMD %rom t"pe x to t"pe "
o ackup the device
o symmaskdb sid backup file backup
o Check the VCMD t"pe using
o symmaskdb sid list database
o Convert %rom t"pe * to t"pe 5
o Symmaskdb sid convert vcmdb_type 5 file Covertfilename
%o initiali2e VCMDB or t"e irst time on a Symmetrix System
-ithin $onix Control Center
Click on the !"mmetrix arra" "ou are tr"ing to initialize the VCM!
!elect Maskin"then VCM! Mana"ementand then initiali/e
!elect a new backup and create a %ile name
Create a %ile name with #sdm extenstion
Click on$ctivate the VCM!
VCMD backups are stored at %home%ecc_inf%data%hostname%data%backup%symmserial%
Also it will be viewable within $onix Control Center at Systems&Symmetri'&VCM! !ackups&
-ith !"mCL$
.o ;uer" the VCMD database
o symmaskdb sid list database
o .o backup and init an existing VCMD database
symmaskdb sid init file backu
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