- Community Home
- >
- Servers and Operating Systems
- >
- Operating Systems
- >
- Operating System - HP-UX
- >
- Re: Mirror-UX
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
тАО09-14-2000 10:08 AM
тАО09-14-2000 10:08 AM
LV's on the Disks on side A are mirrored to disks on side B using mirror-ux.
Now last week one of the disks on side A failed but its mirror copy never took over and the logical volumes on that disk never became available.Putting it in other way mirror-ux simply failed.
Infact I got strange messages in the system log indiacting a SCSI controller failure , but the rest of the disks on side A were still working fine.
THe HP Engineer had to replace the failed disk and the controller card as well.But interestingly we were able to build the filesystems from the mirror copy without any difficulty after replacing the disks.
So why didn't in the first place the mirror copies took over when the disk failed??
Could any one help me understand what happened with my system? Should mirror ux be relied ? And what should I do , for this not to happen again in future?
Thanks
Ash.
Solved! Go to Solution.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО09-14-2000 10:12 AM
тАО09-14-2000 10:12 AM
Re: Mirror-UX
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО09-14-2000 10:29 AM
тАО09-14-2000 10:29 AM
Re: Mirror-UX
I am sorry ,I do not have that file to post the SCSI controller message.But I do remember several lines saying SCSI BUS RESET followed by several Hexadeciaml Numbers.
I tried to run lvdisplay, ioscan ,vgdisplay and several other diagnostic command but they wouldn't run.THey would simply hang.IT seemed like system had just stopped responding to anything.I could just do a more on the syslog file and that's how I found out about the scsi error.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО09-14-2000 10:47 AM
тАО09-14-2000 10:47 AM
SolutionInteresting. Document #KBRC00001157 would suggest that failures are rare, or at least limited as you would expect. I can't find the reference to the Mirrored Disk/XL Reference Manual. From KBRC00001157:
Mirrored Disc and Nonrecoverable Conditions
The system will not be able to recover from the following error conditions:
o Failure of both drive partners.
o Failure of the source drive during the repair operation.
o Use of the SUSPENDMIRROR command on an inconsistent drive.
o Software errors.
o Direct modification of disc using debug.
For further information refer to the Mirrored Disk/XL Reference Manual (part number 30349-90003), page 4-17 (Disk Failure)
Hope this helps some.
...JRF...
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО09-14-2000 10:50 AM
тАО09-14-2000 10:50 AM
Re: Mirror-UX
What I guess happened is that the combination of SCSI controller and disk kept timing out the bus and causing resets. These events take a relatively long time and if they were occurring for most (if not all) disk transfers then the system would appear to 'hang'.
Most disk failures result in the disk appearing to 'die' completely so that the failure doesn't affect any other devices on the bus. HP-UX continues quite happily in these circumstances provided the disk volumes are mirrored.
In this case I think you were unlucky.