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тАО06-15-2005 01:20 PM
тАО06-15-2005 01:20 PM
Raid-5 is secure or not in tru64 with advanced file system
My server is using a raid-5 (SWXCR RAID Controller) system (with tru64 and version hp unix 4.0). Before a week ago, after reboot the system, a harddisk seem was died. And I cannot mount the corresponding point. The whole Oracle db cannot be started which was located at such harddisk. It reported that the system was degraded. I was quite confusing that why only a harddisk was failed and caused the system availability failed ? (The mount point still exist, but there is nothing inside). And, what if I put another new harddisk to replace the bad one? Because other db is still running within the past week. Is the raid-5 system can re-build by itself even though there is a week time gap?
Thanks in advanced !!
Kwan
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тАО06-15-2005 06:40 PM
тАО06-15-2005 06:40 PM
Re: Raid-5 is secure or not in tru64 with advanced file system
I would use RCU to check the status of the disks. Perhaps you only need to re-enable the LUN. Of course the failing disk (if it is a permanent failure) needs to be replaced.
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тАО06-15-2005 08:06 PM
тАО06-15-2005 08:06 PM
Re: Raid-5 is secure or not in tru64 with advanced file system
Thanks for your treasure advice. But, actually I am not familiar with tru64 system. Can you kindly brief me how to check the disk and re-enable the LUN
Thanks
Kwan
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тАО06-16-2005 01:24 AM
тАО06-16-2005 01:24 AM
Re: Raid-5 is secure or not in tru64 with advanced file system
I don't believe that this array had an online utility, but I could be wrong. It's been a very long time since I had to do this.
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тАО06-16-2005 03:28 AM
тАО06-16-2005 03:28 AM
Re: Raid-5 is secure or not in tru64 with advanced file system
If the platform kit was installed correctly at the time, then swxcrmon is the program that monitors de SWXCR, and swxcrmgr the GUI that lets you manage it from the OS.
If swxcrmon was properly configured, it should have sent mail to 'someone' about the failing RAID.
The binaries are normally installed in /usr/opt/swxcr*
The'other' db instance is probably on another RAID logical unit in another filesystem and another moountpoint.
When the offline disks are replaced or reenabled in their RAID-set, you will have to restore the data of the not-running instance from backup(tape?) and hopefully the Oracle redo-log can then help to fix the db-data.
Explaining all this in detail via this forum largely exceeds the possibilities of this medium. (It does not replace the manuals)
___ Johan.
_JB_
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тАО06-19-2005 10:18 AM
тАО06-19-2005 10:18 AM
Re: Raid-5 is secure or not in tru64 with advanced file system
like said before, one failed disk should not kill the drive. You can use the swxcrmgr to see the status of the disks involved. With that tool you can also set the disk to optimal again with all risks or try to rebuild the set with a replaced disk.
What error does a mount attempt return?
greetings,
Michael