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How to NOT connect an SVC in a core-edge Brocade fabric
seb_
Tags:
vc
edge
performance
brocade
longdistance
svc
channel
isl
virtual
san
core
le
san_design
18 Comments
43,345 Views
In one of my previous posts I wrote about "Why inter-node traffic across ISLs should be avoided" . There is an additional "bad practice" that could lead to performance problems in the host-to-SVC traffic. Let's imagine a core-edge fabric. A...
from Blog: seb's sanblog
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Replicated rootvg, ghostdev and NPIV
cggibbo
Tags:
rootvg
boot
chris
lpar
support
led
replication
chris_gibson
virtual
npiv
554
hang
san
ghostdev
replicated
fibre
disaster
aix
recovery
hung
fc
vfc
hds
channel
gibson
dr
vsp
14 Comments
57,639 Views
Update, May 14th, 2019 : It's been 7 years since I first published this post. Power Systems and PowerVM technology has progressed significantly since then. Hence the need for me to provide an update to this blog post. So, if you're planning on or...
from Blog: Chris's AIX Blog
Modified on by cggibbo
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How to configure your SAN for Global Mirror using FCoIP with Brocade Multiprotocol Devices
talor
Tags:
v7000
integrated_routing
fabric
global_mirror
svc
san
zoning
fcoip
storwize
brocade
14 Comments
43,675 Views
Remote replication using V7000 has been very popular, and there are many clients happily replicating without FC connectivity between the sites. I have written about SVC and V7000 low bandwidth global mirror before (link below) but it's worth writing up how to...
from Blog: Advent One Infrastructure Blog
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UPDATED: Grow your rootvg on the fly (from 6.1 TL 4)
AnthonyEnglish
Tags:
rootvg
6.1
5.3
chvg
resize
aix
lun
san
spare
growth
volume_group
extendlv
7.1
disk
backend
13 Comments
57,026 Views
There are lots of good reasons for having spare disk for rootvg, as I
looked at in the post make
way for rootvg . With virtual disks you can resize your volume group
on the fly: Increase rootvg
dynamically If your rootvg “disk” is actually virtual,...
from Blog: AIX Down Under
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SAN Myths Uncovered: Quality of Service in Brocade FabricOS
seb_
Tags:
fabos
vc
san
quality_of_service
isl
fabricos
brocade
qos
priority
performance
11 Comments
46,017 Views
When Brocade released FabricOS v6.0 in 2007 Quality of Service sounded like a great idea: It allows you to prioritize your traffic flow to the level of certain device pairs. There are 3 levels of priority: High - Medium - Low Inter Switch Links (ISLs) are...
from Blog: seb's sanblog
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Performance buffers for Brocade ISLs
seb_
Tags:
isl
vc
portcfgeportcredits
credit
qos
channel
san
virtual
troubleshooting
brocade
buffer
holb
performance
11 Comments
39,030 Views
Sometimes we notice that an ISL is actually a bottleneck in a fabric. Not a congestion bottleneck where the throughput demand is just too high for the ISL's bandwidth. This one could be solved by putting another cable between the both switches. But if you...
from Blog: seb's sanblog
Modified on by seb_
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Don't shoot the messenger - The error 1370
seb_
Tags:
error
ascq
storage
010030
virtualization
1370
event
san
storwize
v7000
kcq
troubleshooting
asc
external
svc
scsi
10 Comments
44,558 Views
The Storwize V7000 and the SVC (SAN Volume Controller) share the same code base and therefore the same error codes. Many of them indicate a failure condition in this very machine, but there are others just pointing to an external problem source. The error 1370...
from Blog: seb's sanblog
Modified on by seb_
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Why inter-node traffic across ISLs should be avoided
seb_
Tags:
design
san
slow
device
lease
troubleshooting
isls.
svc
expiry
controller
drain
volume
9 Comments
21,818 Views
If you use a SAN Volume Controller it usually is the linchpin of your SAN. Except for the FICON and tape related stuff everything is connected to it. It is the single host for all your storage arrays and the single storage for all your host systems. Because of...
from Blog: seb's sanblog
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Where on earth are the IBM VMware SRAs?
anthonyv
Tags:
esx
san
srm
v7000
storwize
ibm
vmware
sra
storage
netapp
vsphere
xiv.
xiv
tagged
svc
and
7 Comments
22,321 Views
I always laugh when people say to me: I wouldn't know what to blog about! When you work in pre-sales support, you constantly get asked questions and each one of them could be the subject of a new blog post. Right now the most common question I am getting...
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Hu Yoshida should know better
I am still wiping the coffee off my computer screen, inadvertently sprayed when I took a sip while reading HDS' uber-blogger Hu Yoshida's post on storage virtualization andvendor lock-in . This blog appears to be the text version of their funny video . While...
from Blog: Inside System Storage
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Show disk size with getconf DISK_SIZE /dev/hdisk0
AnthonyEnglish
Tags:
lspv
mb
"lspv_size"
lun
bootinfo
gb
san
deprecated
aix
disk
physical
volume_group
lsdev
getconf
size
vios
6 Comments
154,165 Views
Give bootinfo the boot If you want to get the size of a disk (virtual or physical), you can use the AIX getconf command . getconf DISK_SIZE /dev/hdisk0 140013 The size is reported in MB, so the disk above is a 140 GB disk. You could use...
from Blog: AIX Down Under
Modified on by AnthonyEnglish
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My Blook Is Now Available!
TonyPearson
Tags:
blook
lifecycle
announcements
disk
infrastructure
secondlife
san
bc
green
tape
5 Comments
21,943 Views
It's official! My "blook" Inside System Storage - Volume I is now available. This blog-based book, or “blook”, comprises the first twelve months of posts from this Inside System Storage blog,165 posts in all, from September 1, 2006 to August 31, 2007. ...
from Blog: Inside System Storage
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Storwize V7000 Unified, A marriage of SAN and NAS
Storwize V7000 Unified, A marriage of SAN and NAS Storwize V7000 and the IBM NAS software were married Wednesday, October 12, 2012 at midnight at IBM Storage chapel in San Jose, California. The Reverend Rod Adkins officiated. Following the...
from Blog: IBM Storage
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Fleet cars and skin cells
Well, this week I am in Maryland, just outside of Washington DC. It's a bit cold here. Robin Harris over at StorageMojo put out this Open Letter to Seagate, Hitachi GST, EMC, HP, NetApp, IBM and Sun about the results of two academic papers, one from Google,...
from Blog: Inside System Storage
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Defining SAN performance-related terms
seb_
Tags:
slow
definition
pressure
buffer
bottleneck
congestion
brocade
device
credit
san
dictionary
back
drain
starvation
snia
performance
4 Comments
34,501 Views
I claim that in 2012 performance problems will keep their place amongst the most frequent and most impacting problems in the SAN. In many of the cases the client's users really notice a performance impact and so the admin calls for support. Other support cases...
from Blog: seb's sanblog
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SAN Myths Uncovered 3: Changing Fillwords - The Bloodletting of Brocade SAN
seb_
Tags:
bloodletting
port
fibrechannel
troubleshooting
switch
myths
uncovered
san
arb
8gbps
fillwords
fos
arbff
8g
fillword
fcp
idle
fabricos
brocade
4 Comments
39,501 Views
I thought I'd never have to write about fillwords. I thought: there will be a phase of some months and then this topic is dead. Strangely enough it's still alive. I still get questions about them, I still see people blaming them and I still see...
from Blog: seb's sanblog
Modified on by seb_
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How to fight back pressure against an appliance in a core edge fabric
seb_
Tags:
vc
performance
buffers
brocade
appliance
hold_time
asic
frame
svc
san
buffer_credits
core
edge
4 Comments
25,406 Views
A slow drain device often has a huge impact on the performance of many other devices in a SAN environment. That happens, because they block resources in a fabric other devices use as well. The main example for such a resource are ISLs, particularly the Virtual...
from Blog: seb's sanblog
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Announcements for August 2007
The proof-of-concept that IBM Haifa research center developed back in 1998 became what we now call the iSCSI protocol.The book iSCSI: The Universal Storage Connection introduces the history as follows: In the fall of 1999 IBM and Cisco met to discuss the...
from Blog: Inside System Storage
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September 20 Second Life Event
Well, we had another successful event in Second Life today. Unlike our April 26 launch of our System Storage products for IBM Business Partners only, this time we decided this time to make it as a "Meet the Storage Experts" Q&A Panel format, and open up...
from Blog: Inside System Storage
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How to be prepared for the next problem determination - Part 2
seb_
Tags:
cisco
infrastructure
brocade
troubleshooting
counters
support
san
switch
3 Comments
22,994 Views
Two additional topics for my previous post came into my mind and I doubt that they will be the last ones :o) Have a proper SAN management infrastructure For most of you it's self-evident to have a proper SAN management infrastructure, but from time to time I...
from Blog: seb's sanblog
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A recap of storage industry acquisitions
On SearchStorage.com, my buddy Tony Asaro recaps the latest Storage Acquisition Frenzy . It has always been the case in fast pace technology areas that you can't tell the players without a program card, andthis is especially true for storage. When analyzing...
from Blog: Inside System Storage
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How to deal with slow drain devices?
seb_
Tags:
performance
congestion
drain
checklist
draining
slow
troubleshooting
san
3 Comments
53,431 Views
One of the ugliest things that can happen in a SAN is a big performance problem introduced by a slow drain device (or slow draining device). Why is it so ugly? Well, if a full fabric or a full data center drops down - due to a fire for example - it's...
from Blog: seb's sanblog
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Storage Area Networks - Convergence
Continuing on my theme of storage area networking, today I thought I would coverthe concept of convergence. This is the notion of disparate things that come together. Convergence plays a big role in Apple's new iPhone . ExpatJane has a nice collection of news...
from Blog: Inside System Storage
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Management of Scarcity and the Storage Infrastructure
For those of us in the northern hemisphere, yesterday was this year's Winter Solstice , representingthe shortest amount of daylight between sunrise and sunset. So today, I thought I would blog on my thoughtsof managing scarcity. Earlier in my career, I had...
from Blog: Inside System Storage
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Migrating data with mklvcopy
AnthonyEnglish
Tags:
syncvg
mirror
lslv
reducevg
synchronise
migratepv
unmirrorvg
varyonvg
smitty
lun
disk
logical_volume_manager
mirrrovg
volume_group
lv
lvm
mklvcopy
extendvg
vg
logical_volume
aix
smit
pavlova
storage
lsvg
rmlvcopy
san
3 Comments
35,659 Views
SERVING UP LVs, PVs and PAVs Since we've got redundant arrays on SANs these days, it may seem almost quaint to speak about software mirroring using the AIX Logical Volume Manager. Even so, LVM is very useful when you want to move data around. If you need to...
from Blog: AIX Down Under
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SAN Myths Uncovered 2: The LD mode (Brocade)
seb_
Tags:
brocade
le
mode
ld
troubleshooting
san
configuration
frame_size
ls
remote
long_distance
3 Comments
33,324 Views
I didn't blog for a while now because of an internal project. Like each software development project it's never really over and development will be going on in the next years to bring in new functions, but I hope I have some more time for blogging again now....
from Blog: seb's sanblog
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InsideSystemStorage makes the Data Storage Bloggers Wiki
Wow! I've only had this blog since Sep. 1, and already it is listed in the Data Storage Bloggers wiki list. In last week's System Storage Portfolio Top Gun class in Dallas, some of the students were not familiarwith Really Simple Syndication (RSS). For the...
from Blog: Inside System Storage
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How to determine the average frame size
seb_
Tags:
brocade
san
cisco
frame
average
troubleshooting
buffer_credits
performance
portstatsshow
3 Comments
30,732 Views
I was asked where to look at in a switch to find the average frame size for a port. The safest way would be to use an external monitoring tool like a VirtualWisdom or a tracer as described in my LD mode article but if you don't own something like that you can...
from Blog: seb's sanblog
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"I need it yesterday" - quicker copies between AIX systems
AnthonyEnglish
Tags:
bus
high
jfs
lun
exportvg
adapter
rsync
ethernet
speed
san
varyoffvg
virtual
copy
nolog
logging
varyonvg
importvg
data
3 Comments
20,405 Views
"Go live or go home" If you need to get a lot of data from one AIX host to another, there's
more than one way to do it quickly. During a migration to a new system, you may do a database dump or archive and want to get the data available to the new...
from Blog: AIX Down Under
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How to be prepared for the next problem determination
seb_
Tags:
problem
time
prepare
change_management
support
san
troubleshooting
naming
determination
san_layout
3 Comments
11,569 Views
To be honest the title for this article could also be "How to ease the life of your technical support". But in fact it will ease the life of everyone involved in a problem case and the priority #1 is to solve upcoming problems as quickly as possible....
from Blog: seb's sanblog
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Of VCs and tunnels - Inside the SAN06B-R
seb_
Tags:
credits
vc
fc
virtual
bottleneck
brocade
fcr
router
routing
channel
fcp
fcip
buffer
san
2 Comments
19,364 Views
I don't always write technical blog posts. But when I do I make them long and the conclusion contains a request to you my readers to do this or that. I won't do that today. Today is about a behavior I observed, but I won't propose anything. Feel...
from Blog: seb's sanblog
Modified on by seb_
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IBM Symposium Melbourne Day 1
TonyPearson
Tags:
san384b-2
san768b-2
phil+tasker
icl
joe+screnci
ibm
cloud+storage
australia
brocade
melbourne
san
fcp
clod+barrera
gary+luke
2 Comments
18,062 Views
This week, I am in Melbourne, Australia for the [ IBM System x and System Storage Technical Symposium ]. Here is a recap of Day 1:
Keynote Session The keynote was led by Phil Tasker, IBM Business Unit Executive (BUE) for STG Education Programs in Growth...
from Blog: Inside System Storage
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Upgrading IBM SAN Volume Controller from CG8 to SV1 model Community Blog
AshutoshP
Tags:
storage
lab
cg8
virtualize
svc
sdi
spectrum
san
ssd
sv1
controller
services
volume
2 Comments
4,059 Views
This post was coauthored by Ashutosh Pathak and Gauurav Sabharwal, Technical Solution Architects for IBM Systems Lab Services Storage and Software Defined Infrastructure. In this digital era, business agility depends on IT services and their IT...
from Blog: IBM Systems Lab Services Worldwide
Modified on by TamiD
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Does server virtualization require enterprise storage arrays?
seb_
Tags:
enterprise
virtualization
hds
dual-controller
modular
storage
san
arrays
2 Comments
10,732 Views
HDS' Hu Yoshida wrote an interesting theory on his blog . Basically he says that while modular dual-controller storage arrays might be useful for traditional physical server deployments, virtualized servers would need enterprise storage arrays. (Which...
from Blog: seb's sanblog
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5 Things to Know about Modernizing Your IT Infrastructure
DeanaC
Tags:
flash
fabric
networking
vision
spectrum
insight
coud
hybrid
storwize
storage
b-type
san
ibm
cloud
gen
products
6
i/o
2 Comments
11,125 Views
New business demands are driving new applications, which get us into a digital world. A rich, meaningful digital experience is the key to effective engagement in today’s integrated digital world. Companies are able to customize digital experiences for...
from Blog: 5 Things To Know IBM Redbooks Blog
Modified on by DeanaC
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Things I like in Brocade FOS 7.0 - Part 3: Little helpers
seb_
Tags:
fabos
history
timeout
discards
no_access
zone_conflict
firmware
san
troubleshooting
7.0
fos
fabricos
segmented
ras
porterrshow
brocade
2 Comments
27,647 Views
There are some goodies in FOS 7.0 that are not announced big-time. Goodies especially for us troubleshooters. There are regular but not too frequent so called RAS meetings. Here we have the possibility to wish for new RAS features - wishes born out of real...
from Blog: seb's sanblog
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How to simplify your SAN zoning
anthonyv
Tags:
fibre
simplify
san
zoning
ds800
switch
alias
v7000
xiv
storwize
svc
channel
2 Comments
23,960 Views
Lets imagine a new rack server or a new blade server has been added to your Fibre Channel SAN. The first job for the SAN administrator is to zone it to the storage it requires access to. The task normally runs something like this: Identify the WWPNs for the...
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Things I like in Brocade FOS 7.3x Part 1: supportinfoclear
seb_
Tags:
counters
brocade
san
fos
statistics
reset
clear
support
fabricos
troubleshooting
supportinfoclear
2 Comments
19,505 Views
Brocade FabricOS v7.3x is officially supported for IBM clients now. Among all the new features and improvements there are some I would like to cover in small blog entries. Especially for the ones directly related to support and troubleshooting. One command to...
from Blog: seb's sanblog
Modified on by seb_
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Things I like in Brocade FOS 7.0 - Part 2: The Frame Log
seb_
Tags:
feature
timeout
fos
discard
fabricos
7.0
performance
brocade
san
fabos
troubleshooting
drop
2 Comments
16,581 Views
Time for another piece of my little series ! This time I'd like to write about a new feature in v7.0x especially for administrators and support personnel: The Frame Log. Maybe it's a bit early to write about it, because it seems to be a feature "in...
from Blog: seb's sanblog
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The risk of a fake SFP
seb_
Tags:
fake
cisco
compatible
45w1216
spf
san
ibm
spoof
troubleshooting
brocade
re-brand
2 Comments
32,845 Views
It's the nightmare of every motorist. Your car was just repaired a few days ago and now it stopped running in the middle of nowhere. Or you even crashed, because the brakes just didn't work in the rain. Fake parts are a big problem in the automotive...
from Blog: seb's sanblog
Modified on by seb_
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My year 2011 (and then?)
I blog for a while now. Looking back I had a personal blog about things I'm interested in some years during my study. I did a comedic fake news page, too. My wife and I write a blog about our baby and I also have an IBM internal blog about SAN troubleshooting....
from Blog: seb's sanblog
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5 Things to Know about IBM Spectrum Virtualize Software and HyperSwap Configuration
JamesPistilli
Tags:
storwize
volume
v5000
v3500
hyperswap
ibm
storage
redbooks
v3700
san
v7000
2 Comments
21,105 Views
IBM® Spectrum Virtualize Software V7.6 provides software-defined storage capabilities across various platforms, including IBM SAN Volume Controller, IBM Storwize® V7000, Storwize V7000 (Unified), Storwize V5000, Storwize V3700, and Storwize V3500....
from Blog: 5 Things To Know IBM Redbooks Blog
Modified on by JamesPistilli
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Thinking about cloud security? What about your SAN?
seb_
Tags:
san
fabric
access
cloud
brocade
aaa
policy
security
fabricos
storage
2 Comments
16,398 Views
Everyone is talking about cloud security these days. Is it clever to give my data outside my own data center? To another company? Maybe even outside the country? How safe and secure is that? Not only the way in between but also then there? Are they protected...
from Blog: seb's sanblog
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Virtual World and Real Storage
Registration is now open for our next "Meet the Storage Experts" event in Second Life. All IBMers, clients and IBM Business Partners are welcome to attend. We will focus this time on DS3000 and N series disk systems, tape systems,and IBM storage networking...
from Blog: Inside System Storage
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Don't be a storage exhibitionist!
seb_
Tags:
ip
ibm
svc
san
storwize
apache
attacker
security
bulletin
deletion
struts
controller
vulnerability
exposure
volume
fud
1 Comment
17,730 Views
Last week IBM released a security bulletin named " Unauthorized access exposure on IBM SAN Volume Controller and Storwize Family ". It's about vulnerabilities in Apache Struts that could...
from Blog: Storageneers
Modified on by seb_
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I am taking a break
Well, I'm going to take a two week break from blogging. Not because my clarification of storage terminology got me Marc Farley's finger wagging of shame . No, I'm going on vacation.I'll be going to a third-world country, possibly outside the reaches of cell...
from Blog: Inside System Storage
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Why congestion bottlenecks are dangerous, too
seb_
Tags:
storage
brocade
san
latency
performance
congestion
troubleshooting
bottleneckmon
slow_drain
ras
bottleneck
1 Comment
22,875 Views
Almost a year ago I wrote an article about congestion bottlenecks in Brocade switches. I said you should avoid them, because they mean that you probably have no redundancy because of too much workload or you don't use it properly. You can...
from Blog: seb's sanblog
Modified on by seb_
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CRC - The watchdog of the physical realm
seb_
Tags:
correction
forward
cisco
crc
san
brocade
troubleshooting
fec
error
1 Comment
27,147 Views
Many of you (at least many of the few really reading this stuff) may already know what CRC is. But I think it doesn't hurt to have a short recap. CRC means Cyclic Redundancy Check and can be used as an error detection technique. Basically it calculates a kind...
from Blog: seb's sanblog
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New Storage offerings April 2007
IBM had some big announcements today. The theme for today's announcement was "Protected Information", as there are many reasons to protect your most strategic asset, your information. Let's do a quick run-down of a few of them. IBM LTO generation 4 LTO 4...
from Blog: Inside System Storage
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Categories
I have created blog categories, based on our System Storage offering matrix, which you can track individually: Disk Disk systems, including the IBM System Storage DS Family of products, SAN Volume Controller, N series, as well as features unique to these...
from Blog: Inside System Storage
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