How not to install fibre links between data centres!
Hi Folks,
A couple of years ago we had to replace the core switches between two of our data centres, a simple task for the most part - these new switches would be state of the art Cisco Catalyst units.
The link between the two sites was a dark fibre, with 8Gb bandwidth running full duplex over a redundant cable pair. It was quite a surprise when we started to tidy up the cables to find this - see the attached images.
The cables comprised two male to male cables, with the ends joined with Bluetack. I'm amazed that it worked for so long. - Actually I'm amazed it worked at all!
hi. I am newbie in Unix. I wanted to install Free BSD 5.2.1 to my computer which winXp was already installed. But i couldn't.
I chose Standard. Then it said you are going to use dos style fdisk partitioning. Then a window displayed begining like this.
WARNING: A geometry of 155127/16/63 for... (0 Replies)
Hi,
I have variables like mentioned below and want to separate as mentioned in output.
var1="4 x fibre cards"
var2="2 fibre cards"
var3="6 - fibre cards"
var4="4 x dual-port"
I have variables like this.I want to separate numbers from this and fibre cards from this.
output has to be... (4 Replies)
Hello,
I have two systems that are being prepared to be SAN attached ..
can anyone tell me any specific checks I should perform prior to the cards being installed...
I am aware of firmware / OS level and relevant drivers, is there anything else?
thanks
Chris. (8 Replies)
We will be buying new Xeon E5-based servers for our datacenter and were wondering which Fibre Channel host bus adapters we should select for these. The choices are Emulex or QLogic (8Gb FC HBAs). Anybody have any recommendations on which is the better choice?
Thanks in advance. (1 Reply)
Hi guys,
I've been trying to tackle this issue for days and I'm stumped. Hopefully someone can give more light on what else I can do.
I have a p7 series box, with dual VIOS and 10 lpars and everything was working fine until I had to move the box to another location in the data centre. Ensured... (16 Replies)
Discussion started by: aixkidbee
16 Replies
LEARN ABOUT REDHAT
apcsmart
APCSMART(8) Network UPS Tools (NUT) APCSMART(8)NAME
apcsmart - Driver for American Power Conversion Smart Protocol UPS equipment
NOTE
This man page only documents the hardware-specific features of the apcsmart driver. For information about the core driver, see nutups-
drv(8).
SUPPORTED HARDWARE
apcsmart should recognize all APC models that use a serial protocol at 2400 bps. This is primarily the Smart-UPS and Matrix-UPS lines, but
some Back-UPS Pro models are also supported.
Some older hardware may only report a handful of variables. This is usually not a bug - they just don't support anything else.
CABLING
This driver expects to see a 940-0024C cable or a clone by default. You can switch to the 940-0095B dual-mode cable support with the
cable= definition described below.
If your 940-0024C cable is broken or missing, use this diagram to build a clone:
http://www.exploits.org/nut/library/cables/940-0024C.jpg
EXTRA ARGUMENTS
This driver supports the following optional settings in the ups.conf(5):
cable=940-0095B
Configure the serial port for the APC 940-0095B dual-mode cable.
sdtype=num
Use shutdown type num, according to this table:
0: soft shutdown or powerdown, depending on battery status
1: soft shutdown followed by powerdown
2: instant power off
3: power off with grace period
Modes 0 and 1 will power up the load when power returns. Modes 2 and 3 will keep the load turned off when the power returns.
BUGS
Some older APC UPS models return bogus data in the status register during a front panel test. This is usually detected and discarded, but
some other unexpected values have occasionally slipped through.
AUTHOR
Russell Kroll
SEE ALSO
The core driver:
nutupsdrv(8)
Internet resources:
The NUT (Network UPS Tools) home page: http://www.exploits.org/nut/
NUT mailing list archives and information: http://lists.exploits.org/
Tue Oct 22 2002 APCSMART(8)