1
Drive Fan Pack
1-17
About the Deskside Disk-Array Processor Enclosure
Figure 1-12
SP Fan Pack
Standby Power
Supply (SPS)
The Standby Power Supply (SPS) is an optional component of the
deskside DPE. For configurations using write cache (for example,
RAID 5), an SPS is required. The SPS provides the ac backup power
required to protect the integrity of the Fibre Channel array storage
processor (SP) write cache. The array can use the write cache only
while a fully charged SPS is present. One SPS can maintain the ac
power to the deskside DPE. For higher availability, to allow write
caching to continue when an SPS is faulted or not fully charged, you
can use a second SPS.
Figure 1-13
SPS
Installing an SPS and cabling it to a deskside DPE is explained in the
manual
DC Standby Power Supply (SPS) Installation
(014002887)
.
IMPORTANT You can remove the SP fan pack
while the DPE is powered up. If the fan pack is
removed for more than about two minutes, the SPs
and disk modules power down. The disk modules and
SPs power up again when you re-install the SP fan
pack.
Status light
Содержание FC4400
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