IBM Power Systems 775 Manual page 307

Compute node
This node is used for customer applications. Compute nodes in a 775 cluster include no
local disks or Ethernet adapters. The nodes are diskless nodes, as shown in
Example 5-45.
Example 5-45 The share_root mode in compute node (diskless node)
# mount
node mounted mounted over vfs date options
-------- --------------- --------------- ------ ------------ ---------------
SN.ibm.com /install/nim/shared_root/GOLD_71Bdskls_shared_root /
stnfs xxx xx xx:xx hard
SN.ibm.com /install/nim/spot/GOLD_71Bdskls/usr /usr nfs3 xxx xx
xx:xx ro,hard,intr,acl,nimperf
I/O node
This LPAR node features attached disk storage and provides access to the disk for
applications. In IBM Power 775 clusters, the I/O node runs GPFS and manages the
attached storage as part of the GPFS storage, as shown in Example 5-46.
Example 5-46 Split the I/O slots C9-C12 (connected to DE) for the IO node f10c12ap13 -hf0
# lsvm f10c12ap13-hf0
13: 537/U78A9.001.1122233-P1-C9/0x21010219/2/13
13: 536/U78A9.001.1122233-P1-C10/0x21010218/2/13
13: 529/U78A9.001.1122233-P1-C11/0x21010211/2/13
13: 528/U78A9.001.1122233-P1-C12/0x21010210/2/13
Example 5-47 shows the topology information of an I/O node.
Example 5-47 The topology info of an IO node
# topsummary /gpfslog/pdisktopology.out
P7IH-DE enclosures found: 000DE22
Enclosure 000DE22:
Enclosure 000DE22 STOR P1-C4/P1-C5 sees both portcards: P1-C4 P1-C5
Portcard P1-C4: ses20[0154]/mpt2sas0/24 diskset "37993" ses21[0154]/mpt2sas0/24
diskset "18793"
Portcard P1-C5: ses28[0154]/mpt2sas2,mpt2sas1/24 diskset "37993"
ses29[0154]/mpt2sas2,mpt2sas1/24 diskset "18793"
Enclosure 000DE22 STOR P1-C4/P1-C5 sees 48 disks
Enclosure 000DE22 STOR P1-C12/P1-C13 sees both portcards: P1-C12 P1-C13
Portcard P1-C12: ses22[0154]/mpt2sas0/24 diskset "26285"
ses23[0154]/mpt2sas0/23 diskset "44382"
Portcard P1-C13: ses30[0154]/mpt2sas2,mpt2sas1/24 diskset "26285"
ses31[0154]/mpt2sas2,mpt2sas1/23 diskset "44382"
Enclosure 000DE22 STOR P1-C12/P1-C13 sees 47 disks
Enclosure 000DE22 STOR P1-C20/P1-C21 sees both portcards: P1-C20 P1-C21
Portcard P1-C20: ses36[0154]/mpt2sas2,mpt2sas1/24 diskset "04091"
ses37[0154]/mpt2sas2,mpt2sas1/24 diskset "31579"
Portcard P1-C21: ses44[0154]/mpt2sas3/24 diskset "04091"
ses45[0154]/mpt2sas3/24 diskset "31579"
Enclosure 000DE22 STOR P1-C20/P1-C21 sees 48 disks
Enclosure 000DE22 STOR P1-C28/P1-C29 sees both portcards: P1-C28 P1-C29
Portcard P1-C28: ses38[0154]/mpt2sas2,mpt2sas1/24 diskset "64504"
ses39[0154]/mpt2sas2,mpt2sas1/24 diskset "52307"
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Chapter 5. Maintenance and serviceability