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IBM BladeCenter PS703 and PS704 Technical Overview and Introduction
2.9 Internal storage
PS703 and PS704 blades use a single integrated 3 Gb SAS controller. The controller
attaches to the IO hub PCIe Gen1 connector operating at 2.5 Gbps. The PS704 has a single
embedded SAS controller located on the SMP planar. The PS704 base planar has no SAS
controller.
The PS703 blade embedded SAS controller provides a standard 2.5” connector for the
internal drive, and 2 ports through the CIOv connector to the optional 3 Gb SAS Passthrough
Expansion Card to the BladeCenter SAS switch modules. The SAS controller ports used for
the internal disk drives can support a single 2.5-inch SAS hard disk drive (HDD) or two
1.8-inch SATA solid state drives (SSD) via the SAS to SATA interposer card at each DASD
bay location, as shown in Figure 2-23.
Figure 2-23 PS703 SAS configuration
Note: The anchor card used in the PS700-PS704, unlike the card used in the JS series of
blades, does not contain LPAR or virtual server configuration data (such as CPU and
mmmemory allocations). When this card is swapped during a blade replacement operation
to the new blade the configuration information must be restored from a profile.bak file
generated on the old blade by the VIOS prior to the replacement. The command to
generate the profile.bak file is
bkprofdata
. The VIOS command to restore profile data is
rstprofdata
. Generating a profile.bak should be part of good administrative practices for
POWER-based blades.
x8 Gen1
HDD/SSD connector
1x 2.5” HDD or
2x 1.8” SSDs
SAS Controller
Modules in bays 3 &
4 of the chassis
SAS Passthru card
(CIOv)
Ba
y 3
Ba
y 4
P7IOC
I/O hub
3Gb
SAS
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