This article introduces the main components of VMAX3 system bay. VMAX3 (100K, 200K, 400K ) system is composed of 1 to 8 (or 1 to 4) system bays.

VMAX3 users could choose single engine bay or dual engine bay.  For single engine bay there is only 1 engine in a system bay (8 system bays at the most), for dual engine bay there are 2 engines in a system bay (4 system bays at the most).

If configured as single engine bay, the major components include: SPS to sustain the engine, engine, PDU, KVM, Ethernet switch, DAE.

The bottom SPS tray presents only when multiple engines are configured, as Infiniband switch is used only more than 1 engine are configured.

System bay 2 to 8 don’t have: Infiniband switch, the bottom SPS tray, KVM and Ethernet switch. Also, work tray takes place of KVM.

The capacity of SPS is 2.2 KW. When system down, it could provide two 5 minutes to provide power, system could use this period to flush memory data to flash, which is called Vault.

For single engine bay configuration, if the number of system engine is more than 1, system bay 1 most has 2 SPS trays (4 SPS) to support engine and Infiniband switch.

In system bay 2 to 8, only one SPS Tray (2 SPS) is used to support engine.

For dual engine bay configuration, system bay 1 will has 3 SPS trays (6 SPS) to support engine 1 and Infiniband switch. SPS 2A/2B is used to support engine 2.

For system bay 2 to 4, each system bay has 2 SPS trays (4 SPS) to support 2 engines.

The internal connection fabric of the system use Infiniband switch. Infiniband switch presents only in multi-engine systems, and only presents in system bay 1. VMAX3 has two types of Infiniband switch. 400K uses 18 ports switch, 100K and 200K use 12 ports switch.

18 port switch use redundant plug-and-play power and fan, and could replace the power or fan alone.  12 port switch also has redundant power, since it is not FRU, you need to replace the whole switch when power is down.

Each engine in VMAX3 has 2 directors. The above one is the even director, the bottom one is the odd director. Each director has redundant power protection.

The PDU is equivalent to the PDP and PDU in VMAX2, which charge the whole system.

VMAX3 supports two types of DAE. 60-drive DAE could hold 60 different capacity/speed 3.5 inch disks. 120-drive DAE could hold 120 different capacity/speed 2.5 inch disks.

With whatever configuration, system bay 1 has a pair of Ethernet switch, which connect to the engine to monitor the system environment.

KVM (mouse, keyboard, monitor) is located in system bay 1. CE could use KVM to login simplified symmwin to maintain VMAX3.

System bay 2 to system bay 8 have no KVM, but only Work Tray. It contains power line and cable. CE could connect MMCS with laptop, to login the simplified symmwin.

Since VMAX3 could support dispersed configuration, other system bays may be far from system bay 1. Work Tray is designed for CE to run the system maintenance and component replacement script.