Parm Patram

disable usb0 nic RHEL5

admin — Fri, 03 Feb 2012 18:14:25 +0000

The usb0 NIC sometimes causes problems with certain Oracle grid components on 11g RAC.

Setting the /etc/sysconfig/network-scripts/ifcfg-usb0 ‘ONBOOT=no’ does not always work and the devices fires up again.

You can disable the NIC from even initializing by adding the following as the first line in /etc/udev/rules.d/60-net.rules
ACTION==”add”, DRIVER==”usb”, SYSFS{configuration}==”CDC Ethernet”, OPTIONS+=”ignore_device, last_rule”

Turn on agent debugging (VCS)

admin — Tue, 13 Dec 2011 20:48:44 +0000

http://www.symantec.com/business/support/index?page=content&id=HOWTO58833

Solaris fix for boot problems

admin — Tue, 22 Nov 2011 16:23:25 +0000

A kernel patch caused the machine to panic, leaving it in a confused state. I was able to boot from a CD and back out the patch, but it did not update the boot archive, even after issuing
/sbin/bootadm update-archive -R /a

to fix:

Boot into the disk failsafe, then run:

/a/boot/solaris/bin/create_ramdisk -R /a

make flar for Solaris

admin — Sat, 19 Nov 2011 15:33:57 +0000

/usr/sbin/flarcreate -cSn “some comment” -a “some_email@somewhere.com” -R / -X /root/exclude_from_flar.txt /path/to/archive.flar

without the ‘-a’ the flar install will fail with the error: “ERROR: Could not find archive”

fix terminal when in single user mode (Solaris)

admin — Thu, 17 Nov 2011 20:28:22 +0000

ksh -o vi
export TERM=vt100
/usr/openwin/bin/resize
or, If booted from CD or in failsafe:
/a/usr/openwin/bin/resize

Grow ocfs2 partition

admin — Tue, 20 Sep 2011 20:24:29 +0000

tunefs.ocfs2 -S

See long running jobs in the RAC

admin — Wed, 10 Aug 2011 12:59:22 +0000

column
select inst_id,opname, totalwork, sofar, time_remaining from gv$session_longops where totalwork > sofar order by time_remaining;

Fix disabled or stale VXFS volumes

admin — Wed, 10 Aug 2011 03:24:57 +0000

export DG=SOME-DG clear; for i in `vxprint -ht -g ${DG}|grep DISA| grep ^pl | awk '{print $2}'`; do echo "vxmend -g ${DG} fix stale $i" echo "vxmend -g ${DG} fix clean $i"; done vxvol -g ${DG} startall

Add new mount point to VCS service group

admin — Tue, 21 Jun 2011 14:44:19 +0000

# add volume definition
hares -add SRVS-vol8 Volume SRVS-SG
hares -modify SRVS-vol8 Critical 0
hares -modify SRVS-vol8 DiskGroup cjprd
hares -modify SRVS-vol8 Volume cjprd-vol8
hares -modify SRVS-vol8 Enabled 1
hares -link SRVS-vol8 SRVS-dg 0 0

# Add mount definition
hares -add SRVS-odbf4 Mount SRVS-SG
hares -modify SRVS-odbf4 Critical 1
hares -modify SRVS-odbf4 SnapUmount 0
hares -modify SRVS-odbf4 CkptUmount 1
hares -modify SRVS-odbf4 SecondLevelMonitor 0
hares -modify SRVS-odbf4 SecondLevelTimeout 30
hares -modify SRVS-odbf4 MountPoint /cjprd/odbf4
hares -modify SRVS-odbf4 BlockDevice /dev/vx/dsk/cjprd/cjprd-vol8
hares -modify SRVS-odbf4 FSType vxfs
hares -modify SRVS-odbf4 MountOpt
hares -modify SRVS-odbf4 FsckOpt -y
hares -modify SRVS-odbf4 Enabled 0
hares -modify SRVS-odbf4 Critical 0
hares -modify SRVS-odbf4 Enabled 1
hares -link SRVS-odbf4 SRVS-vol8 0 0

hares -modify SRVS-odbf4 Critical 1
hares -link SRVS-odbf4 SRVS 0 0
hares -modify SRVS-vol8 Critical 1
haconf -dump

LDOM console connection hangs

admin — Thu, 16 Jun 2011 13:02:21 +0000

Problem: not able to connect to the console

-> start /CH/BL1/SP/cli
Are you sure you want to start /CH/BL1/SP/cli (y/n)? y

…just hangs indefinitely

Solution: We need to reset the serial port to the blade.

-> reset /CH/BL1/SP
Are you sure you want to reset /CH/BL1/SP (y/n)? y
Performing hard reset on /CH/BL1/SP

-> start cli
Are you sure you want to start /CH/BL1/SP/cli (y/n)? y

… connects successfully to the console now.