HP EVA P6000 - Page 14

High Availability/ Fault
Tolerance/
Hot pluggable support
All EVA P6000 models are configured with dual HSV controllers that operate in a redundant mode. Each
controller has either four redundant FC paths; or two redundant FC paths and four redundant 1Gb/s iSCSI
paths; or two redundant FC paths and two redundant 10Gb/s iSCSI/FCoE paths. In the event of a path
failure, the alternate paths to the controller can be utilized with the use of multi-path software in the
Operating System.
Each EVA P6300/P6350 controller has two SAS connectors, each carrying two SAS signals. With the HP
P6300/P6350, one SAS cable, carrying two redundant SAS signals, connects to one SAS I/O module on a
drive enclosure; and the second SAS cable, carrying two more redundant SAS signals, connects to the other
SAS I/O module of a drive enclosure. For the EVA P6300/P6350, up to ten drive enclosures can be
connected in a SAS daisy-chain arrangement with a controller pair. At the end of the daisy chains, each
chain is then connected to the second EVA P6300/P6350 controller.
Each EVA P6500/P6550 controller has two SAS connectors, each carrying four SAS signals. A Y-SAS cable is
used to split the signals into two branches, each with two SAS signals. One branch of the Y-cable, carrying
two redundant SAS signals, connects to one SAS I/O module on a drive enclosure; the second branch of the
Y-cable goes to a SAS I/O module on a second drive enclosure. Similarly, a second Y-SAS cable, carrying
two more redundant SAS signals per branch, connects to the other SAS I/O module of each of the two drive
enclosures. For the EVA P6500/P6550, up to twenty LFF SAS drive enclosures or eighteen SFF SAS drive
enclosures or combinations of LFF and SFF SAS enclosures (up to 20 enclosures as long as a 450 drive
count is not exceeded) can be connected in a SAS daisy-chain arrangement with a controller pair. At the
end of the daisy chains, each chain is then connected to the second EVA P6500/P6550 controller, again
using Y-SAS cables.
Within the SAS drive enclosures, one I/O module connects to one port of each SAS drive in the enclosure;
and the other I/O module connects to the second port of each SAS drive.
The HSV340 and HSV360 controllers also have dual redundant hot plug power supplies and dual
redundant hot plug blowers. Each controller has hot plug cache batteries to maintain cache contents for up
to 96 hours in case of a total power failure.
The M6612 and M6625 SAS drive enclosures have dual redundant hot plug SAS I/O modules that allow the
controllers to distribute I/Os between the two modules and provides redundant paths should either I/O
module become unavailable. The enclosure also has dual redundant hot plug power supplies and dual hot
plug blowers. Environmental Monitoring Unit (EMU) functionality is built into the I/O modules in the
enclosures and monitors and reports the condition of the power supplies and fans.
The SAS SSD, enterprise SAS, and mid-line SAS disk drives have dual SAS lanes which can be redundantly
accessed by each controller. The drives are hot plug. The drives can be configured, using redundant Vraid
1, Vraid 5, or Vraid 6 protection so that a drive failure will not cause loss of data. Optional virtual sparing
can be configured so that a drive failure will trigger an automatic rebuild of the Vraid 1, Vraid 5, or Vraid 6
protection using the virtual spare drive(s).
NOTE: SSDs do not support Vraid 0.
All EVAs have dual redundant power distribution. Two independent power cords distribute power through
two Power Distribution Units (PDUs) to each side of the EVA cabinets, to each power supply of the
controllers and to each power supply of the drive enclosures. Each cabinet power cord can be connected to
independent power sources. For maximum availability, a customer should provide redundant power from
independent power circuit breakers, independent power lines from the power company and even
independent power companies. Battery -backed UPS (Uninterruptible Power Supplies) or independent
power generators can also be deployed.
QuickSpecs
HP EVA P6000 Storage
Product Highlights
DA - 13904 Worldwide — Version 26 — September 30, 2013 Page 14