Hitachi G1500 - Page 4

Front-end directors.............................................................................................36
Supported connectors and protocols............................................................38
Flexible front-end director installation...........................................................41
Supported speeds and cable lengths........................................................... 44
Back-end director...............................................................................................45
Flexible back-end director installation.......................................................... 46
Drive chassis......................................................................................................46
Cache memory...................................................................................................51
Memory operation.........................................................................................53
Data protection............................................................................................. 53
Cache capacity.............................................................................................53
Shared memory............................................................................................54
Cache flash memory..........................................................................................58
Cache flash memory operation.................................................................... 58
Cache flash memory capacity...................................................................... 58
Chapter 3: Hardware architecture....................................................... 60
System architecture overview............................................................................60
VSP G1000, VSP G1500, and VSP F1500 RAID implementation.................... 61
Array groups and RAID levels...................................................................... 61
RAID 1.....................................................................................................61
RAID 5.....................................................................................................63
RAID 6.....................................................................................................65
LDEV striping across array groups...............................................................66
Control unit images, logical volume images, and logical units...........................68
CU images....................................................................................................68
Logical volume images.................................................................................69
Logical units..................................................................................................69
Mainframe operations........................................................................................ 69
Mainframe compatibility and functionality.....................................................69
Mainframe operating system support........................................................... 70
Mainframe configuration...............................................................................70
Open-systems operations..................................................................................71
Contents
Hitachi Virtual Storage Platform G1000, G1500, and VSP F1500 Hardware Guide 4