IBM pSeries 670, Service Manual

Page: 152 / 1032

Step 1321-34
Reboot the system and and bring all partitions to the login prompt. If Linux is not usable in all partitions, go
to “Step 1321-38” on page 133.
Step 1321-35
Use the lscfg command to list all resources assigned to all partitions. Record the adapter and the partition
for each resource.
Step 1321-36
To determine if any device(s) or adapter(s) are missing, compare the list of found resources and partition
assignments to the customer’s known configuration. Record the location of any missing devices. Also
record any differences in the descriptions or the locations of devices.
You may also compare this list of found resources to a prior version of the device tree as follows:
Note: Every time that the partition is booted, the update-device-tree command is run and the device tree
is stored in the /var/lib/lsvpd/ directory in a file with the file name device-tree-YYYY-MM-DD-
HH:MM:SS, where YYYY is the year, MM is the month, DD is the day, and HH, MM, and SS are
the hour, minute and second, respectively, of the date of creation.
v At the command line, type the following:
cd /var/lib/lsvpd/
v
At the command line, type the following:
lscfg -vpd device-tree-2003-03-31-12:26:31
.
This displays the device tree created on 03/31/2003 at 12:26:31.
The diff command offers a way to compare the output from a current lscfg command to the output from
an older lscfg command. If the files names for the current and old device trees are current.out and
old.out , respectively, type:
diff old.out current.out
. Any lines that exist in the old, but not in the current
will be listed and preceded by a less-than symbol (<). Any lines that exist in the current, but not in the old
will be listed and preceded by a greater-than symbol (>). Lines that are the same in both files are not
listed; for example, files that are identical will produce no output from the diff command. If the location or
description changes, lines preceded by both < and > will be output.
If the system is configured with more than one logical partition with Linux installed, repeat “Step 1321-35”
and “Step 1321-36” for all logical partitions that have Linux installed.
Step 1321-37
Was the location of one and only one device recorded in “Step 1321-36”?
No If you previously answered Yes to “Step 1321-37”, return the system to its original configuration.
This ends the procedure. Go to
″
MAP 0410: Repair Checkout
″
in the RS/6000 and
Eserver
pSeries Diagnostic Information for Multiple Bus Systems .
If you did not previously answer Yes to “Step 1321-37”, go to “Step 1321-38” on page 133.
Yes Perform the following steps one at a time. Power off the system before performing each step. After
performing each step, power on the system and go to “Step 1321-34”.
1. Check all connections from the system to the device.
2. Replace the device (for example, tape or DASD)
3. If applicable, replace the device backplane.
4. Replace the device cable.
5. Replace the adapter.
6. If the adapter resides in an I/O drawer, replace the I/O backplane.
132
Eserver
pSeries 670 Service Guide