Skip to ContentSkip to Footer
Start of content
- Community Home
- >
- Storage
- >
- Entry Storage Systems
- >
- Disk Enclosures
- >
- Adding paths to active SCSI LUNs on XP256
Disk Enclosures
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for
-
- Forums
-
Blogs
- Alliances
- Around the Storage Block
- Behind the scenes @ Labs
- HPE Careers
- HPE Storage Tech Insiders
- Infrastructure Insights
- Inspiring Progress
- Internet of Things (IoT)
- My Learning Certification
- OEM Solutions
- Servers: The Right Compute
- Shifting to Software-Defined
- Telecom IQ
- Transforming IT
- Infrastructure Solutions German
- L’Avenir de l’IT
- IT e Trasformazione Digitale
- Enterprise Topics
- ИТ для нового стиля бизнеса
- Blogs
-
Quick Links
- Community
- Getting Started
- FAQ
- Ranking Overview
- Rules of Participation
- Contact
- Email us
- Tell us what you think
- Information Libraries
- Integrated Systems
- Networking
- Servers
- Storage
- Other HPE Sites
- Support Center
- Enterprise.nxt
- Marketplace
- Aruba Airheads Community
-
Forums
-
Blogs
-
InformationEnglish
Topic Options
- 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
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content
07-31-2002 07:04 AM
07-31-2002 07:04 AM
Adding paths to active SCSI LUNs on XP256
I'm trying to do something I thought was simple, but now HP has made me think it might not be.
I have an N4000 (MPE7.0) connected to my XP256 through 3 SCSI ports (1J,1K,2J), 8 LUNs per port. This is my production box, so these ports/LUNs are active.
I'm implementing Cluster/iX with HP's help, and need to create a second set of paths to these same LUNs for the standby server, but on different SCSI ports (1M,2L,2M). The standby server will be configured in such a way as to not disturb the active LUNs (HP is onsite to do this part).
Question is, can I add new paths to these LUNs in Define (Offline) without disturbing the current active use of those LUNs? I would think so, because the ports I'm adding paths to (1M,2L,2M) are NOT active, and my understanding is it's the PORT that has to be inactive, not the whole channel. And I'm just adding a path, I'm not actually doing anything to the disks or the data in those LUNs. Right?
If anyone has done this before, I'd sure appreciate some guidance. HP Stress-Free is throwing out vague concerns about MPE and the XP, and I don't see how MPE even plays into this. But I want to be safe.
Thanks!
I have an N4000 (MPE7.0) connected to my XP256 through 3 SCSI ports (1J,1K,2J), 8 LUNs per port. This is my production box, so these ports/LUNs are active.
I'm implementing Cluster/iX with HP's help, and need to create a second set of paths to these same LUNs for the standby server, but on different SCSI ports (1M,2L,2M). The standby server will be configured in such a way as to not disturb the active LUNs (HP is onsite to do this part).
Question is, can I add new paths to these LUNs in Define (Offline) without disturbing the current active use of those LUNs? I would think so, because the ports I'm adding paths to (1M,2L,2M) are NOT active, and my understanding is it's the PORT that has to be inactive, not the whole channel. And I'm just adding a path, I'm not actually doing anything to the disks or the data in those LUNs. Right?
If anyone has done this before, I'd sure appreciate some guidance. HP Stress-Free is throwing out vague concerns about MPE and the XP, and I don't see how MPE even plays into this. But I want to be safe.
Thanks!
2 REPLIES
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content
07-31-2002 07:17 AM
07-31-2002 07:17 AM
Re: Adding paths to active SCSI LUNs on XP256
You've got it right.
Adding paths to LUNs will not change the data on the LUNs.
Offline mode will require that you have no traffic on the ports being modified (1M, 2L, 2M), and works best when the cable is not connected to the port (thereby preventing any traffic). You can add LUNs to a port in Online mode as well. (Only deleting LUNs from a port must be done in Offline mode)
I'm sure that the people at Stress Free are just concerned with the second MPE system. The frame operation of assigning the LUNs to the port is a no-brainer.
Don't forget to set the host mode behavior! Something like that could cause your second MPE system to hose the data on the LUNs should it get a hold of them. Be sure to go over the settings with Stree Free.
Good luck!
Good luck!
Adding paths to LUNs will not change the data on the LUNs.
Offline mode will require that you have no traffic on the ports being modified (1M, 2L, 2M), and works best when the cable is not connected to the port (thereby preventing any traffic). You can add LUNs to a port in Online mode as well. (Only deleting LUNs from a port must be done in Offline mode)
I'm sure that the people at Stress Free are just concerned with the second MPE system. The frame operation of assigning the LUNs to the port is a no-brainer.
Don't forget to set the host mode behavior! Something like that could cause your second MPE system to hose the data on the LUNs should it get a hold of them. Be sure to go over the settings with Stree Free.
Good luck!
Good luck!
No matter where you go, there you are.
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content
07-31-2002 05:36 PM
07-31-2002 05:36 PM
Re: Adding paths to active SCSI LUNs on XP256
There're two modes, offline and online on the LUN configuration manager.
Offline means that there should be no IOs on the ports that are being modified.
On the other hand, in the online mode, you can only add new paths.
You can't delete paths there.
I have no experience with MPE but on HP-UX, adding a second path to a LUN is not a problem and doesn't disturb the ative LUNs configurd at all.
Offline means that there should be no IOs on the ports that are being modified.
On the other hand, in the online mode, you can only add new paths.
You can't delete paths there.
I have no experience with MPE but on HP-UX, adding a second path to a LUN is not a problem and doesn't disturb the ative LUNs configurd at all.
Never say "no" first.
The opinions expressed above are the personal opinions of the authors, not of Hewlett Packard Enterprise. By using this site, you accept the Terms of Use and Rules of Participation.
End of content
United States
Hewlett Packard Enterprise International
Communities
- Communities
- HPE Blogs and Forum
© Copyright 2019 Hewlett Packard Enterprise Development LP