Data Centre meets Vacuum Cleaner Post: 303014201

Sponsored Content

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

View Public Profile for gull04

Visit gull04's homepage!

Find all posts by gull04

6 More Discussions You Might Find Interesting

1. News, Links, Events and Announcements

The HP-UX Porting and Archive Centre

If you're looking for an easy source of free software for HP-UX, look no further. A consortium of major universities and HP user groups have banded together and operate what is simply the finest free software site in existence. The world's best HP-UX software engineers have ported each package...

2. Solaris

Sun Management Centre

Hi Guys, Does anyone ever use Sun MC before? If yes, can u share with me how to do the installation. Thanks

3. Shell Programming and Scripting

Cleaner method for this if-then statement?

I have a script that runs once per month. It performs a certain task ONLY if the month is January, April, July, or October. MONTH=`date +%m` if || || || ; then do something else do a different thing fi Is there a neater way of doing it than my four separate "or" comparisons? That...

4. Shell Programming and Scripting

Cleaner way to use shell variable in awk /X/,/Y/ syntax?

$ cat data Do NOT print me START_MARKER Print Me END_MARKER Do NOT print me $ cat awk.sh start=START_MARKER end=END_MARKER echo; echo Is this ugly syntax the only way? awk '/'"$start"'/,/'"$end"'/ { print }' data echo; echo Is there some modification of this that would work? awk...

5. Shell Programming and Scripting

A cleaner way to rearrange column

Hello, I have some tab delimited text data, index name chg_p chg_m 1 name,1 1 0 2 name,2 1 1 3 name,3 1 0 4 name,4 1 0 5 name,5 1 1 I need to duplicate the "index" column, call it "id" and insert it after the...

6. Shell Programming and Scripting

Maybe a cleaner way to generate a file?

greetings, to be clear, i have a solution but i'm wondering if anyone has a cleaner way to accomplish the following: the variable: LSB_MCPU_HOSTS='t70c7n120 16 t70c7n121 16 t70c7n122 16 t70c7n123 16 t70c7n124 16 t70c7n125 16 t70c7n126 16 t70c7n127 16 t70c7n128 16 t70c7n129 16 t70c7n130 16...

LEARN ABOUT OSF1

stripe

stripe(8)						      System Manager's Manual							 stripe(8)

NAME

       stripe - Stripes a file across several volumes in a file domain

SYNOPSIS

       /usr/sbin/stripe -n  volume_count filename

OPTIONS

       Specifies the number of volumes the striped file crosses. The number of volumes must be greater than one.

OPERANDS

       Specifies the name of the file to stripe.

DESCRIPTION

       The  stripe utility enables you to improve the read/write performance of a file. The stripe utility directs a zero-length file (a file with
       no data written to it yet) to be spread evenly across several volumes within a file domain.  As data is appended to the file, the  data	is
       spread across the volumes. AdvFS determines the number of pages per stripe segment and alternates the segments among the disks in a sequen-
       tial pattern.

       Existing, nonzero-length files cannot be striped using the stripe utility. To stripe an existing file, create a new file,  use  the  stripe
       utility	to  stripe  the  new file, and copy the contents of the file you want to stripe into the new striped file. After copying the file,
       delete the nonstriped file.

       Once a file is striped, you cannot use the stripe utility to modify the number of disks that a striped file crosses. To change  the  volume
       count of a striped file, you can create a second file with a new volume count, and then copy the contents of the first file into the second
       file. After copying the file, delete the first file.

RESTRICTIONS

       You cannot stripe a nonzero-length file or a file that is already striped.

EXAMPLES

       The following example stripes the file abc across three volumes in the same file domain: # stripe -n 3 abc The following example stripes an
       existing,  nonzero-length  file,  foo, across three volumes in the same domain. First a new file, newfoo, is created and striped. Then, the
       contents of file foo are copied to the new, striped file: # touch newfoo # stripe -n 3 newfoo # cp foo newfoo

SEE ALSO

       advfs(4), showfile(8)

																	 stripe(8)