Understanding F20 ESS and defining a correct IOCDS

[Hans Rempel]

I will be installing my first F20 ESS (Shark). It has not arrived but I do know that it is using 36.4 GB drives and has 1.6 Terabytes. I was not able to find a copy of the “IBM Total Storage ESS Introduction and Planning Guide” GC26-7294 on the web. If any one has this guide or a URL I would appreciate getting a copy. I did download and reviewed the Redbook “Implementing ESS in your environment”.   My understanding is that the ESS will come with 8 by 210 GB arrays/ranks (each having 8 drives) and these will be attached to adapter 1 to 4 in cluster 1 and 1 to 4 in cluster 2. Also, there is going to be only 4 loops with 2 array/groups on each loop. Looks like a very small configuration. Did I understand the manual correctly?   This is my first take on the IOCDS. We will not be using PAV and I suspect we will be using 68  3390-3 on Interleave array and x? custom volumes on the NI partition. I assume I can define any size and number of 3390s I wish to use up the approx 15GB of data.     Is this then the correct IOCDS? Also is there a way to configure access to all volumes via one or two channels? I have a z/800 two LPAR system. One VM/VSE and one for LINUX.   Thanks for you comments and suggestions.   Hans Rempel   * 04-07  4 CHANNELS TO RVA CHAN04   CHPID PATH=04,TYPE=CNC,SHARED CHAN05   CHPID PATH=05,TYPE=CNC,SHARED CHAN06   CHPID PATH=06,TYPE=CNC,SHARED CHAN07   CHPID PATH=07,TYPE=CNC,SHARED * 0A-0D  4 CHANNELS TO RVA CHAN0A   CHPID PATH=0A,TYPE=CNC,SHARED CHAN0B   CHPID PATH=0B,TYPE=CNC,SHARED CHAN0C   CHPID PATH=0C,TYPE=CNC,SHARED CHAN0D   CHPID PATH=0D,TYPE=CNC,SHARED * * F20 ESS DASD * CNTRLA01 CNTLUNIT CUNUMBR=A01,PATH=(04,05,0A,0B),UNIT=2105,           X                UNITADD=((00,256)),CUADD=0 CNTRLA02 CNTLUNIT CUNUMBR=A02,PATH=(06,07,0C,0D),UNIT=2105,           X                UNITADD=((00,256)),CUADD=1 CNTRLA03 CNTLUNIT CUNUMBR=A03,PATH=(04,05,0A,0B),UNIT=2105,           X                UNITADD=((00,256)),CUADD=2 CNTRLA04 CNTLUNIT CUNUMBR=A04,PATH=(06,07,0C,0D),UNIT=2105,           X                UNITADD=((00,256)),CUADD=3 CNTRLA05 CNTLUNIT CUNUMBR=A05,PATH=(04,05,0A,0B),UNIT=2105,           X                UNITADD=((00,256)),CUADD=4 CNTRLA06 CNTLUNIT CUNUMBR=A06,PATH=(06,07,0C,0D),UNIT=2105,           X                UNITADD=((00,256)),CUADD=5 CNTRLA07 CNTLUNIT CUNUMBR=A07,PATH=(04,05,0A,0B),UNIT=2105,           X                UNITADD=((00,256)),CUADD=6 CNTRLA08 CNTLUNIT CUNUMBR=A08,PATH=(06,07,0C,0D),UNIT=2105,           X                UNITADD=((00,256)),CUADD=7 * * F20 DASD 68 3390-3 + 5 Volumes in NI Partition per rank          IODEVICE ADDRESS=(2000,256),CUNUMBR=(A01,A02),UNIT=3390,     X                UNITADD=00,STADET=Y          IODEVICE ADDRESS=(2400,256),CUNUMBR=(A03,A04),UNIT=3390,     X                UNITADD=00,STADET=Y          IODEVICE ADDRESS=(2800,256),CUNUMBR=(A05,A06),UNIT=3390,     X                UNITADD=00,STADET=Y          IODEVICE ADDRESS=(2C00,256),CUNUMBR=(A07,A08),UNIT=3390,     X                UNITADD=00,STADET=Y