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

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LEARN ABOUT FREEBSD

rup

RUP(1)							    BSD General Commands Manual 						    RUP(1)

NAME

     rup -- remote status display

SYNOPSIS

     rup [host ...]

DESCRIPTION

     The rup utility displays a summary of the current system status of a particular host or all hosts on the local network.  The output shows the
     current time of day, how long the system has been up, and the load averages.  The load average numbers give the number of jobs in the run
     queue averaged over 1, 5 and 15 minutes.

     The rpc.rstatd(8) daemon must be running on the remote host for this command to work.  The rup utility uses an RPC protocol defined in
     <rpcsvc/rstat.x>.

EXAMPLES

     example% rup otherhost
     otherhost	 7:36am  up 6 days, 16:45,  load average: 0.20, 0.23, 0.18
     example%

DIAGNOSTICS

     rup: RPC: Program not registered  The rpc.rstatd(8) daemon has not been started on the remote host.

     rup: RPC: Timed out  A communication error occurred.  Either the network is excessively congested, or the rpc.rstatd(8) daemon has terminated
     on the remote host.

     rup: RPC: Port mapper failure - RPC: Timed out  The remote host is not running the portmapper (see rpcbind(8)), and cannot accommodate any
     RPC-based services.  The host may be down.

SEE ALSO

     rpc.rstatd(8), rpcbind(8)

HISTORY

     The rup command appeared in Sun-OS.

BUGS

     The sorting options are not implemented.

BSD
								   June 7, 1993 							       BSD