- Community Home
- >
- Storage
- >
- Entry Storage Systems
- >
- Disk Enclosures
- >
- Do I need a LUN 0 defined
Categories
Company
Local Language
Forums
Discussions
Forums
- Data Protection and Retention
- Entry Storage Systems
- Legacy
- Midrange and Enterprise Storage
- Storage Networking
- HPE Nimble Storage
Discussions
Forums
Discussions
Discussions
Discussions
Forums
Discussions
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
- BladeSystem Infrastructure and Application Solutions
- Appliance Servers
- Alpha Servers
- BackOffice Products
- Internet Products
- HPE 9000 and HPE e3000 Servers
- Networking
- Netservers
- Secure OS Software for Linux
- Server Management (Insight Manager 7)
- Windows Server 2003
- Operating System - Tru64 Unix
- ProLiant Deployment and Provisioning
- Linux-Based Community / Regional
- Microsoft System Center Integration
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Community
Resources
Forums
Blogs
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
08-20-2002 08:19 AM
08-20-2002 08:19 AM
Do I need a LUN 0 defined
Is this incorrect? If so are there patches that allow you not to have to define a LUN 0.
Also, how does this apply to sequential LUN numbering? I know there are patches that get around this.
Thanks.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
08-20-2002 09:16 AM
08-20-2002 09:16 AM
Re: Do I need a LUN 0 defined
If you are referring to the VA7100, you are correct, LUN 0 must be defined. It can be as small as 10MB. However, all hosts must have WC permission to this LUN in order to communicate with the array. To my knowledge, there are no patches to ignore this requirement.
Sequential LUN number patches are for instance, you have LUN 1,2,3 and 10,11,12. Without the sequential LUN patches, you would only see LUN 1,2,3 and 10,11,12 would not appear. This does not mean you have to have LUN 1,2,3, you could have LUN 1,10,20,30, etc. However, you must still have LUN 0 for array communication.
HTH,
Dave
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
08-20-2002 09:28 AM
08-20-2002 09:28 AM
Re: Do I need a LUN 0 defined
What kind of disk sub-systems are we talking about?
live free or die
harry
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
08-20-2002 09:30 AM
08-20-2002 09:30 AM
Re: Do I need a LUN 0 defined
Howver, isn't this a limitation of the HBA driver anyway. As a result the array type wouldn't matter.
Am I correct?
Thanks.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
08-20-2002 09:34 AM
08-20-2002 09:34 AM
Re: Do I need a LUN 0 defined
It's the device that needs a LUN 0. I have servers on a SAN without a LUN 0 to an HBA.
live free or die
harry
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
08-20-2002 09:43 AM
08-20-2002 09:43 AM
Re: Do I need a LUN 0 defined
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
08-20-2002 09:45 PM
08-20-2002 09:45 PM
Re: Do I need a LUN 0 defined
The LUN 0 is required if Windows systems are connected to the SAN as well. If you only have
HP-UX systems connected to the SAN, LUN 0 is not required.
Kurt
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
08-21-2002 04:48 AM
08-21-2002 04:48 AM
Re: Do I need a LUN 0 defined
I actually caontacted HP support and had a storage engineer contact me.
He informed me that a LUN 0 is ALWAYS required.
From my testing I have never been able to see anything unless I have a LUN 0 defined.
I appreciate all the feedback but I think there is some bad info. going around.
Thanks.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
08-21-2002 06:12 AM
08-21-2002 06:12 AM
Re: Do I need a LUN 0 defined
I think I'm very wrong:
http://bizforums.itrc.hp.com/cm/QuestionAnswer/0,,0x766050011d20d6118ff40090279cd0f9,00.html
We need Insu Kim to pipe in here :-)
live free or die
harry
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
08-22-2002 03:58 AM
08-22-2002 03:58 AM
Re: Do I need a LUN 0 defined
http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0xa66142308663d611abdb0090277a778c,00.html
HTH
Duncan
I am an HPE Employee

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
08-22-2002 03:45 PM
08-22-2002 03:45 PM
Re: Do I need a LUN 0 defined
To avoid confusion on my post, I'm specifically referring to the VA7x00. The information in my previous post for that device is correct. As to the Hitachi, I've not worked with that device and cannot speak to it's configuration.
Good Luck,
Dave
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
08-26-2002 10:11 AM
08-26-2002 10:11 AM
Re: Do I need a LUN 0 defined
Here's output from an ioscan when I attach to a Hitachi 9200 array:
See attachment.
If you notice, I don't have a LUN 0 on target 0 but am able to see subsequent LUNS. I do, however, have a LUN 0 on target 1. It appears that you do need a LUN 0, but not necessarily on the same target.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
09-10-2002 05:12 PM
09-10-2002 05:12 PM
Re: Do I need a LUN 0 defined
Regards, Bill