Data Centre meets Vacuum Cleaner Post: 303014201

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The Lounge War Stories Data Centre meets Vacuum Cleaner Post 303014201 by gull04 on Wednesday 7th of March 2018 04:10:19 AM

03-07-2018

Registered User

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

gull04

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ppi::token::data5.18

PPI::Token::Data(3)					User Contributed Perl Documentation				       PPI::Token::Data(3)

NAME

       PPI::Token::Data - The actual data in the __DATA__ section of a file

INHERITANCE

	 PPI::Token::Data
	 isa PPI::Token
	     isa PPI::Element

DESCRIPTION

       The "PPI::Token::Data" class is used to represent the actual data inside a file's "__DATA__" section.

       One "PPI::Token::Data" object is used to represent the entire of the data, primarily so that it can provide a convenient handle directly to
       the data.

METHODS

       "PPI::Token::Data" provides one method in addition to those provided by our parent PPI::Token and PPI::Element classes.

   handle
       The "handle" method returns a IO::String handle that allows you to do all the normal handle-y things to the contents of the __DATA__
       section of the file.

       Unlike in perl itself, this means you can also do things like "print" new data onto the end of the __DATA__ section, or modify it with any
       other process that can accept an IO::Handle as input or output.

       Returns an IO::String object.

SUPPORT

       See the support section in the main module.

AUTHOR

       Adam Kennedy <adamk@cpan.org>

COPYRIGHT

       Copyright 2001 - 2011 Adam Kennedy.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

       The full text of the license can be found in the LICENSE file included with this module.

perl v5.18.2							    2011-02-25						       PPI::Token::Data(3)