存储系统中的LUN的分区设置一般有四种方式：
一种基于存储控制器，第二种方式是基于存储主机端口，第三种是基于存储与主机端的LUN MAPPING功能，第四种是依靠HBA卡自身的MAPPING功能。所有存储设备都支持第一种方式，中级以上存储设备还都支持第二种方式，部分高级存储支持第三种方式，个别型号HBA卡支持第四种方式。
第一种方式（基于存储主机控制）要求两种控制器之间关闭缓存共享，两个控制器分别管理不同的卷，FC交换机必须有ZONEING功能，两个控制器的主机端口分别连接到不同的ZONE中。在实际使用过程中，控制器针对任何一个单卷只能相当于单控制，没有热备。一旦一个控制器发生故障，其所管理的卷就会切换到另一台控制上，故障主机所连接的主机将无法正常进行访问，即使修改FC交换机的zoneing设置也无法恢复LUN 分区功能。
第二种方式（基于存储主机端口）是存储设备中的卷与存储设备的主机端口分别绑定，主机通过不同的存储主机端口将访问到不同的卷。该方式要求FC交换机必须有ZONEING功能，主机按照业务的要求分别连接到交换机的不同的zone中。缺点是当一个控制器或一个存储主机端口发生故障时，部分客户端主机将无法正常进行访问。通过修改FC交换机的zoneing设置和LUN与存储主机端口之间的MAPPING，一般来说可以恢复LUN 分区功能。
第三种方式（基于存储与主机端的LUN MAPPING）是最灵活、最安全的方式。可以看做是存储设备这个整体与不主机之间建立的MAPPING关系，实施时FC交换机不需要ZONEING功能。只要在存储设备的管理窗口中正确区别不同主机上HBA卡的WWN地址，就可以完成整个网络的LUN 分区设置。只要不是两个控制器或所有存储主机端口都发生故障，网络都会是正常的。
第四种方式（依靠HBA卡自身的MAPPING功能）实际相当于存储没有LUN 分区功能，每一台主机都可以“识别”到所有的卷，只不过在HBA卡的设置工具中设置某一个卷是否可用，相当于在设备管理器设置是否禁用光驱或软驱一样。
一个具体的项目到底选择哪种LUN分区方式，主要要看业务是否允许LUN分区功能发生短时间的故障，也要看现有什么样的存储设备、FC交换机和HBA卡，还要看网络主机数量的多少，安装时有多大的工作量，发生故障时需要多长时间才能恢复。具体情况具体分析吧。
29 条回复
Greetings! This is my first visit to your blog! We are a group of volunteers and starting a new initiative in a community in the same niche. Your blog provided us useful information to work on. You have done a outstanding job!
Your method of explaining all in this post is truly nice, all can easily understand it, Thanks a lot.
Everything is very open with a precise description of the issues. It was really informative. Your website is extremely helpful. Thank you for sharing!
I’ve been exploring for a little for any high-quality articles or blog posts in this kind of space . Exploring in Yahoo I at last stumbled upon this site. Reading this info So i’m glad to express that I have a very good uncanny feeling I came upon exactly what I needed. I so much without a doubt will make certain to don?t fail to remember this web site and give it a look on a constant basis.
I am curious to find out what blog system you have been working with? I’m experiencing some minor security problems with my latest website and I would like to find something more risk-free. Do you have any solutions?
Hi, I think your website might be having browser compatibility issues. When I look at your blog in Firefox, it looks fine but when opening in Internet Explorer, it has some overlapping. I just wanted to give you a quick heads up! Other then that, terrific blog!
I always used to read post in news papers but now as I am a user of internet so from now I am using net for articles, thanks to web.
Spot on with this write-up, I truly feel this website needs far more attention. I’ll probably be back again to read more, thanks for the info!
Woah! I’m really loving the template/theme of this site. It’s simple, yet effective. A lot of times it’s tough to get that “perfect balance” between superb usability and visual appeal. I must say you have done a fantastic job with this. Additionally, the blog loads very fast for me on Internet explorer. Superb Blog!
Howdy! I know this is kinda off topic however I’d figured I’d ask. Would you be interested in exchanging links or maybe guest writing a blog article or vice-versa? My website discusses a lot of the same subjects as yours and I believe we could greatly benefit from each other. If you might be interested feel free to send me an e-mail. I look forward to hearing from you! Wonderful blog by the way!
I love your blog.. very nice colors & theme. Did you create this website yourself or did you hire someone to do it for you? Plz answer back as I’m looking to create my own blog and would like to know where u got this from. kudos
Hello there! I could have sworn I’ve been to this web site before but after browsing through some of the posts I realized it’s new to me. Anyways, I’m definitely pleased I found it and I’ll be bookmarking it and checking back frequently!
I loved as much as you will receive carried out right here. The sketch is tasteful, your authored subject matter stylish. nonetheless, you command get bought an edginess over that you wish be delivering the following. unwell unquestionably come further formerly again since exactly the same nearly a lot often inside case you shield this increase.
Thanks in favor of sharing such a good idea, post is good, thats why i have read it fully
Элитный частный эромассаж Москва с сауной
Good post however , I was wondering if you could write a litte more on this topic? I’d be very grateful if you could elaborate a little bit more. Thank you!
Great delivery. Solid arguments. Keep up the good effort.
Hey there! This post couldn’t be written any better! Reading this post reminds me of my old room mate! He always kept talking about this. I will forward this post to him. Pretty sure he will have a good read. Thanks for sharing!
I think this is one of the such a lot important information for me. And i’m satisfied reading your article. However wanna remark on few general things, The site taste is great, the articles is in point of fact excellent : D. Just right activity, cheers
My programmer is trying to persuade me to move to .net from PHP. I have always disliked the idea because of the expenses. But he’s tryiong none the less. I’ve been using Movable-type on numerous websites for about a year and am worried about switching to another platform. I have heard very good things about blogengine.net. Is there a way I can transfer all my wordpress content into it? Any kind of help would be really appreciated!
Right now it seems like BlogEngine is the best blogging platform out there right now. (from what I’ve read) Is that what you’re using on your blog?
Thanks for one’s marvelous posting! I seriously enjoyed reading it, you may be a great author.I will make certain to bookmark your blog and definitely will come back from now on. I want to encourage continue your great posts, have a nice morning!
Hey very interesting blog!
Simply want to say your article is as amazing. The clearness in your post is simply spectacular and i can assume you are knowledgeable in this subject. Well with your permission allow me to clutch your RSS feed to stay up to date with forthcoming post. Thank you one million and please keep up the gratifying work.
I love reading a post that will make people think. Also, thanks for allowing me to comment!
An interesting discussion is worth comment. I do believe that you should write more on this issue, it might not be a taboo subject but generally people don’t speak about such topics. To the next! Kind regards!!
When someone writes an post he/she keeps the plan of a user in his/her mind that how a user can know it. So that’s why this post is amazing. Thanks!
Wonderful blog! Do you have any helpful hints for aspiring writers? I’m planning to start my own site soon but I’m a little lost on everything. Would you propose starting with a free platform like WordPress or go for a paid option? There are so many choices out there that I’m totally confused .. Any ideas? Bless you!
There is definately a lot to learn about this subject. I like all the points you made.