Creating 3 mirrors of STD is not possible unless you use CLONE/CLONE Emulation.  lets assume you have a Raid 1 STD device (two mirrors are occupied) and now you create 2 TF/Mirr of it. This will consume all 4 mirror position of Raid 1 STD device. So further TF/Mirr est wont work for this device.  When you enable Clone emulation, it converts your TF/Mirr command to Clone commands in the backend and establishes a Clone session instead of TF/Mirr and as you might be aware that Clone session does not occupy any mirror position so you can create 15 mirrors (Clone emulated) of your STD device now.  No, need to have clone emulation variable enabled if the BCVs are Raid 5 as raid 5 BCV automatically enables the clone emulation.  Hope this clears your doubt.  regards, Saurabh Rohilla
I am trying to split the device pairs which are already sunchronized. I have one source device which has 3 BCV target devices. All the device pairs are in Synchronized state. When I try to perform operations on the device list, I get following error, How can I get the emulation removed from the pairing? I know setting CLONE_EMULATION environment variable makes it work, but is there any other way out of it? pranav]# symmir -sid 258 -f Mirr_258.txt split Execute 'Split' operation for the 3 specified device(s) in device file 'Mirr_258.txt' (y/ ) ? y  'Split' operation execution is in progress for the device list in device file 'Mirr_258.txt'. Please wait... The device pair cannot be manipulated because one or more pairs are TF Clone emulation and emulation is not enabled  pranav]# symmir -sid 258 -f Mirr_258.txt query -v SELECTING the list of Standard devices in the group:   Device: 0486 [SELECTED]   Device: 0486 [SELECTED]   Device: 0486 [SELECTED] SELECTING BCV devices associated with the group:   Device: 051B [SELECTED]   Device: 051C [SELECTED]   Device: 051F [SELECTED] PAIRING of Standard and BCV devices:   Devices: 0486(S) - 051B(B) [PAIRED]   Devices: 0486(S) - 051C(B) [PAIRED]   Devices: 0486(S) - 051F(B) [PAIRED] Device File Name      : Mirr_258.txt Device's Symmetrix ID : xxxxxxxx258      Standard Device                    BCV Device                  State -------------------------- ------------------------------------- ------------                     Inv.                                  Inv. Logical        Sym  Tracks Logical              Sym       Tracks STD <=> BCV -------------------------- ------------------------------------- ------------ N/A            0486      0 N/A                  051B           0 Synchronized Total              -------                               -------   Track(s)               0                                     0   MB(s)                0.0                                   0.0 Legend: (*): The paired BCV device is associated with this group.
How to unset clone emulation on BCV device?