03-07-2018
Data Centre meets Vacuum Cleaner
Hi Folks,
I have just spent a couple of days resolving some problems at the remote DR data centre, sorting out the problems caused by the over zealous use of a Vacuum cleaner of all things.
We have a backup server a SUN V480R with a Storedge 3510 and expansion attached which suffered a significant unexplained failure, all tracked back to an ID selector being touched by the nozzle of said vacuum cleaner - it looks like things went as follows over a period of time.
When the array was installed the setup was disks 0-9 were setup as a 10way stripe with disks 10 and 11 as hot standby disks. Over a period of time, a disk in the expansion (disk 3) failed and the and the first available spare (disk 10) built from the surviving mirror.
At this point the situation that existed left us exposed in a way which wasn't really appreciated, in that the one of the arrays had both mirrors of one part of the stripe. That would be the part that had the exposed ID selector switch, the one that the Vacuum Cleaner nozzle could change causing the failure of one whole stripe and one slice of an other stripe. The result as you can imagine was somewhat unpredictable, which is exactly what the Sun manual for the array says.
To add insult to injury the contents of the 3510 array, was the Legato Networker Backup Catalogue from the 24 drive ATL - making the recovery somewhat awkward.
What's the point of the story - don't let some idiot into a data centre with a Vacuum Cleaner.
Regards
Gull04
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LEARN ABOUT HPUX
smhassist
smhassist(1M) smhassist(1M)
NAME
smhassist - check System Management Homepage configuration problems and recommend solutions
SYNOPSIS
DESCRIPTION
is a command-line utility that checks SMH installation and configuration problems and recommends solutions. checks for common SMH instal-
lation problems, daemons that must be running but are not running, ports that must be open but are not, and other configuration problems.
At the end of the check, generates a report of the problems and recommendations to resolve the problems. Some of the checks done are:
1. swverify on HPSMH
2. swverify on Apache and required patches
3. swverify on WBEM and OpenSSL
4. check for hpsmh group and users
5. check for 2301 and 2381 ports
6. check for smh daemons
A detailed output of is logged to the file at /opt/hpsmh/logs/smhassist.log
checks and recommends solutions to problems in SMH only. does not perform checks on SMH plugins (applications within SMH) such as fsweb,
pdweb, kcweb, and so on.
Options
supports the following options
-v Print verbose output
FILES
/opt/hpsmh/logs/smhassist.log - Stores detailed log output of smhassist
SEE ALSO
smhstartconfig(1M), hpsmh(1M).
AUTHOR
was developed by Hewlett-Packard.
smhassist(1M)