- Community Home
- >
- Storage
- >
- Entry Storage Systems
- >
- Disk Enclosures
- >
- Sharing LUNs on va7400 ??
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
Discussions
Discussions
Forums
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
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
тАО03-28-2002 08:15 AM
тАО03-28-2002 08:15 AM
I have a client, who thinks they would like to mount the same LUN on two different HP-UX systems. R/W on one system and R/O on the other.
I'm not even sure this can be done. But I'm pretty sure it's not a good idea. I see all kinds of problems with the R/O system trying to figure out what's happening while the R/W system is updating data and inodes.
I'm going to recommend either a snapshot LUN using business copy or simply NFS mounting the file system.
But before I do, I wanted to see if anyone had any other thoughts.
Thanks
Solved! Go to Solution.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО03-28-2002 08:24 AM
тАО03-28-2002 08:24 AM
Re: Sharing LUNs on va7400 ??
I think your thoughts are right on the mark. I would do a BC or NFS.
Dave
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО03-28-2002 09:31 AM
тАО03-28-2002 09:31 AM
Solution"In ordinary operation (i.e., without the optional high availability software), it is possible to activate a volume group for read-write access from more than one physically connected system, leading to a high potential for data corruption. Therefore, if access is desired from more than one system to a single volume group, it is important that only one system activate the volume group for read-write access; the other systems can use read-only access. There is no problem if all systems activate the volume group for read-only access.
Furthermore, volume group information is only read from the disks during volume group activation. Dynamic changes to the volume group such as the following are not propagated to other systems sharing the volume group:
Logical volume configuration changes.
Changes to the status of the mirrored extents.
Bad-block relocation that occurs during write operations.
Because of these limitations, when sharing volume groups between systems it is recommended that logical volumes be accessed only by one system at a time. If logical volumes need to be accessed simultaneously, the logical volumes should not be mirrored and should not have bad-block relocation turned on, or all systems should use read-only access to the logical volumes."
Regards,
Steve
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО04-04-2002 10:25 AM
тАО04-04-2002 10:25 AM
Re: Sharing LUNs on va7400 ??
See http://eval.veritas.com/downloads/pro/fso_hp-ux_datasheet.pdf
for some details.
Basically, you can mount a FS R/O by one system, and this software "ie: hack" keeps the R/O system from crashing when the R/W system updates the FS. (it eliminates inode and directory caching, among other things)
Good luck!
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО04-04-2002 10:32 AM
тАО04-04-2002 10:32 AM
Re: Sharing LUNs on va7400 ??
Nice, eh?
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО04-04-2002 10:40 AM
тАО04-04-2002 10:40 AM