Here i'll post how to clear memory
error log and PDT error log in hpux zx6000 and rx26000 itanium servers.This
procedure need to be done after DIMM replacing, for example the server had bad
DIMM/'s and you brought a new and replaced the bad one. After that PDT(Page
Deallocation Table) must be clear.To be sure if you have
any memory errors run: echo "selclass
qualifier memory;info;wait;infolog" | cstm you will get something like that
(differ from memory map):Memory Board Inventory
DIMM
Location
Size(MB) DIMM
Location Size(MB)
——————--
——-- ——————-- ——--
DIMM
0A
2048 DIMM
0B
2048
DIMM
1A
2048
DIMM
1B
2048
DIMM
2A
—- DIMM
2B
—-
DIMM
3A
—- DIMM
3B
—-
DIMM
4A
—- DIMM
4B
—-
DIMM
5A
—- DIMM
5B
—-
Total: 8192 (MB)
===========================================================================
Memory Error Log Summary
DIMM
Location Error
Address Error Type
Page Count
———————-
—————- ———- ————- —--
DIMM
0B
0x12263d00 Single-Bit
0x12263 1
RANK
0
0x40e6042500 Multi-Bit
0x40e6042 N/A
RANK
0
0x40e03ebc00 Multi-Bit
0x40e03eb N/A
RANK
0
0x40c60d3580 Multi-Bit
0x40c60d3 N/A
RANK
0
0x40b0176480 Multi-Bit
0x40b0176 N/A
RANK
0
0x1428e9d80 Multi-Bit
0x1428e9 N/A
above we see a problem with DIMM
0B, he need to be replaced.
Clearing
procedure:
reboot the server, choose start EFI
shell, in the shell type: pdt clear
if you asked a question type
"yes".
Boot the OS, rerun the cstm command
(see above) to be sure if your log is clear. If you'll see the next output all
is ok:
Memory Error Log Summary
The memory error
log is empty.
Page Deallocation Table (PDT)
The Page
Deallocation Table is empty.
If you still see errors you can
simply recreate memory log file:
mv /var/stm/logs/os/memlog
/var/stm/logs/os/memlog.old
touch /var/stm/logs/os/memlog
chmod 644 /var/stm/logs/os/memlog
chown root:root
/var/stm/logs/os/memlog
I am also tried to clear log
through Logtool Utility with no luck:
cstm
cstm>runutil logtool
Logtool Utility>CL
The Memory->Clear Log operation
is not available on IPF systems.
Recreating log memory file always
works.
