Legacy HDS Forums

True and Shadow Image (cascading)

Discussion created by Legacy HDS Forums on Mar 26, 2008
Latest reply on May 30, 2008 by Legacy HDS Forums

Originally posted by: Anderson Krahn


There are times when i need a shadow image of a existing TC pair. For example,
Host A <---TC---> Host B
I need a shadow image of the existing luns on Host A. However, my horcm logs complain that i cannot create the shadow image due to the existing TC pair.
Is it possible to use cascading to create the Shadow pair?
Here is my environment.
Ams1000 microcode 0772/D-H
raid manager
Model : RAID-Manager/Solaris
Ver&Rev: 01-19-03/04

Example horcm0.conf (true copy piece)
tcprddb14 tcprddb14drv1 CL2-B-6 0 6 0
tcprddb14 tcprddb14drv2 CL2-B-6 0 7 0
tcprddb14 tcprddb14drv3 CL2-B-6 0 10 0

horcm1.conf (shadow part)
shadowprddb14 prddb14drv1 CL1-C-7 0 8 0
shadowprddb14 prddb14drv2 CL1-C-7 0 16 0
shadowprddb14 prddb14drv3 CL1-C-7 0 17 0

error messages :
10:18:07-67b5c-01420- MON(HOMRCF):WARNING(LDEV linked) :shadowprddb14, prddb14drv1, unit#0,ldev#120,mu#0 and tcprddb14, tcprddb14drv1, unit#0,ldev#120,mu#0
10:18:07-7051e-01420- MON(HOMRCF):WARNING(LDEV linked) :shadowprddb14, prddb14drv2, unit#0,ldev#1,mu#0 and tcprddb14, tcprddb14drv2, unit#0,ldev#1,mu#0
10:18:07-76301-01420- MON(HOMRCF):WARNING(LDEV linked) :shadowprddb14, prddb14drv3, unit#0,ldev#38,mu#0 and tcprddb14, tcprddb14drv3, unit#0,ldev#38,mu#0

Any help is appreciated.