Author Archives: Randy

Simple Monitoring with Email Alerts that works on LSI MegaRAID and Adaptec

This tool will poll the output of command(s) or URL(s), and send email alerts if the output changes, contains (or not contains) certain text, or becomes unavailable. It’s a light weight, reliable monitoring replacement for the pile of garbage most RAID vendors include with their cards. Complex excludes and finds can be specified as Perl […]

Winsplit Revolution (Like Windows Snap but for Multiple Displays)

I just added a 4th monitor to my office PC and finally admitted to needing help with window placement, far beyond Windows 7’s limited snap feature, this tool really gets the job done: http://www.winsplit-revolution.com/ It’s a free, light-weight ‘snap’ on steroids designed specifically for multi-display setups.

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XenServer multipath configuration for LIO targets

XenServer multipath.conf with special support for LIO-based iSCSI targets to maximize multipath performance and ensures 100% stability. path_grouping_policy setting doesn’t seem to matter (between group_by_prio and multibus) in most basic setups. Invalid lines (as reported by XenServer 6.1) have also been removed. http://djlab.com/stuff/xs61/multipath.conf Specifically: device { vendor “LIO-ORG” product “*” path_grouping_policy group_by_prio path_checker tur getuid_callout […]

X9SCM / X9SCL Network Timeout

Supermicro X9SCM and X9SCL main boards will lose network connection after some heavy traffic, especially on RHEL/CentOS 6. Updating BIOS and driver will not always fix this: Oct 19 18:32:49 zeus kernel: ————[ cut here ]———— Oct 19 18:32:49 zeus kernel: WARNING: at net/sched/sch_generic.c:267 dev_watchdog+0x26d/0x280() (Not tainted) Oct 19 18:32:49 zeus kernel: Hardware name: X9SCL/X9SCM […]

Add or Remove IP Bindings from IIS 7.5

Sometimes you need to run another service on port 80 or 443, but IIS binds to every IP by default. Here’s the trick to add/remove IP’s from IIS 7.5. It cannot be done by any web GUI. netsh http add iplisten ipaddress=1.2.3.4 netsh http del iplisten ipaddress=2.3.4.5 netsh http show iplisten

Kickstart 4-disk RAID10 Recipe

Here’s a nice recipe for a RAID10 array comprised of 4x SSD disks. Tested to work on CentOS 6 (RHEL 6). Be sure to add the discard option in fstab for Trim support. zerombr yes bootloader –location=partition –driveorder=sda,sdb,sdc,sdd clearpart –all –initlabel –drives=sda,sdb,sdc,sdd part raid.100000 –size=250 –ondisk=sda part raid.100001 –size=250 –ondisk=sdb part raid.100002 –size=250 –ondisk=sdc part […]