![Sun Microsystems StorageTek 9985V Скачать руководство пользователя страница 38](http://html.mh-extra.com/html/sun-microsystems/storagetek-9985v/storagetek-9985v_manual_1393025038.webp)
Redundant Power Supplies
Each storage cluster is powered by its own set of redundant power supplies, and each power supply
is able to provide power for the entire system, if necessary. Because of this redundancy, the
ST9985V can sustain the loss of multiple power supplies and still continue to operate. To make use
of this capability, the ST9985V should be connected either to dual power sources or to different
power panels, so if there is a failure on one of the power sources, the ST9985V can continue full
operations using power from the alternate source.
Channel Adapters and Front-End Directors
The channel adapter boards (CHAs) contain the front-end directors (microprocessors) that process
the channel commands from the host(s) and manage host access to cache. In the mainframe
environment, the front-end directors perform CKD-to-FBA and FBA-to-CKD conversion for the data in
cache. Channel adapter boards are installed in pairs. The channel interfaces on each board can all
transfer data at once, independently. Each channel adapter board pair is composed of one type of
channel interface (for example, FICON or NAS). Fibre-channel adapters and FICON-channel
adapters are available in both shortwave (multimode) and longwave (single-mode) versions. The
ST9985V can be configured with multiple channel adapter pairs to support various interface
configurations.
Note:
Performance Monitor allows users to collect and view usage statistics for the front-end
directors in the ST9985V.
Host Channels
The ST9985V supports all-mainframe, all-open system, and multiplatform operations and offers the
following types of host channel connections:
■
FICON.
The ST9985V supports up to 24 FICON ports capable of data transfer speeds of up to
400 MB/sec (4 Gbps). FICON features, available in shortwave (multimode) and longwave
(single mode) versions, can have either 8 or 16 FICON host interfaces per pair of channel
adapter boards. When configured with shortwave FICON channel adapters, the ST9985V can
be located up to 500 meters (2750 feet) from the host(s). When configured with longwave
FICON channel adapters, the ST9985V can be located up to ten kilometers from the host(s). If
you need further FICON-related information, please contact your Sun Microsystems Systems
representative.
Note:
FICON data transmission rates vary according to configuration. Please note:
–
S/390 Parallel Enterprise Servers - Generation 5 (G5) and Generation 6 (G6) only
support FICON at 1 Gbps.
–
z800 and z900 series hosts have the following possible configurations:
FICON channel will operate at 1 Gbps ONLY.
FICON EXPRESS channel transmission rates will vary according to microcode
release. If microcode is 3G or later, the channel will auto-negotiate to set a 1-Gbps or
2-Gbps or 4Gbps transmission rate. If microcode is previous to 3G, the channel will
operate at 1 Gbps ONLY.
Just the Facts
October 2007
38
Sun Confidential – For Internal Use and Authorized Partner Use Only
Содержание StorageTek 9985V
Страница 174: ...Just the Facts October 2007 174 Sun Confidential For Internal Use and Authorized Partner Use Only ...
Страница 175: ...I Just the Facts October 2007 175 Sun Confidential For Internal Use and Authorized Partner Use Only ...
Страница 176: ...Just the Facts October 2007 176 Sun Confidential For Internal Use and Authorized Partner Use Only ...