IBM SAN Volume Controller 2145, Быстрый старт

Страница: 26 / 46

2. Do you have adequate rack space for your hardware? Ensure that you have the following rack space for
your components:
• The SAN Volume Controller 2145-DH8 : Two EIA units high.
3. Do the power circuits that you are planning to use have sufficient capacity and the correct sockets for
your installation?
• A clearly visible and accessible emergency power off switch is required.
4. Have you provided appropriate connectivity by preparing your environment?
5. Do you have a keyboard and display available in the unusual event that a service action requires them?
Contamination information
Contamination information that pertains to the system is included in this topic.
Airborne particulates (including metal flakes or particles) and reactive gases, acting alone or in
combination with other environmental factors such as humidity or temperature, might pose a risk to the
system hardware. Risks that are posed by the presence of excessive particulate levels or concentrations
of harmful gases include damage that might cause the system hardware to malfunction or cease
functioning altogether. This specification specifies limits for particulates and gases that are intended to
avoid such damage. The limits must not be viewed or used as definitive limits because numerous other
factors, such as temperature or moisture content of the air, can influence the impact of particulates or
environmental corrosives and gaseous contaminant transfer.
In the absence of specific limits that are specified in this document, you must implement practices that
maintain particulate or gas levels that are consistent with the protection of human health and safety. If
IBM determines that the levels of particulates or gases in your environment caused damage to the system
hardware, IBM might require remedial measures to mitigate such environmental contamination.
Implementation of appropriate remedial measures might be necessary before IBM provides repair or
replacement of the system hardware. Implementation of such remedial measures is a customer
responsibility.
The following criteria must be met:
Gaseous contamination
Severity level G1 as per ANSI/ISA 71.04-1985
1
, which states that the reactivity rate of copper
coupons shall be less than 300 Angstroms per month (Å/month, ≈ 0.0039 μg/cm2-hour weight gain)
2
.
In addition, the reactivity rate of silver coupons shall be less than 300Å/month (≈ 0.0035 μg/cm2-
hour weight gain)
3
. The reactive monitoring of gaseous corrosivity should be conducted approximately
2 inches (5 cm) in front of the rack on the air inlet side at one-quarter and three-quarter frame height
off the floor, or where the air velocity is much higher.
Particulate contamination
Data centers must meet the cleanliness level of ISO 14644-1 class 8. For data centers without airside
economizers, the ISO 14644-1 class 8 cleanliness can be met by choosing one of the following
filtration methods:
• The room air can be continuously filtered with MERV 8 filters.
• Air entering a data center can be filtered with MERV 11, or preferably MERV 13 filters.
For data centers with airside economizers, the choice of filters to achieve ISO class 8 cleanliness
depends on the specific conditions present at that data center. The deliquescent relative humidity of
the particulate contamination should be more than 60% RH
4
. Data centers must be free of zinc
whiskers
5
.
1. ANSI/ISA-71.04.1985. Environmental conditions for process measurement and control systems:
Airborne contaminants. Instrument Society of America, Research Triangle Park, NC, 1985.
2. The derivation of the equivalence between the rate of copper corrosion product thickness growth in Å/
month and the rate of weight gain assumes that Cu
2
S and Cu
2
O grow in equal proportions.
3. The derivation of the equivalence between the rate of silver corrosion product thickness growth in Å/
month and the rate of weight gain assumes that Ag
2
S is the only corrosion product.
6 SAN Volume Controller 8.3.1: Machine Types 2145, 2147 Models SA2, SV2