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тАО10-27-2004 10:13 PM
тАО10-27-2004 10:13 PM
mirrored disk for disaster recovery on smartarray
working with HP Netraid series controllers, I followed this procedure as a bonus to prevent from O.S. failures, etc. :
- configuration of 2 disks in RAID1 with OS and applications installed
- put one disk offline and replace it with a new one
- rebuild the data on the new disk
- store the old disk in a safe place
- in case of needing, restart the server with the old disk/clean system.
The trick always worked!
Now, I'm not sure about how to do this and if it'll work on a Smartarray series controller, due to its new feature of storing the meta-raid information on the disks and not only in the controller memory as like the netraid did.
Does anyone of you experienced this on the smartarray or has some hints to give me?
Thank you
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тАО10-28-2004 02:37 AM
тАО10-28-2004 02:37 AM
Re: mirrored disk for disaster recovery on smartarray
2. Shutdown the server, remove one drive for backup
3. Start the server with one drive, enable Internim recovery mode
4. Add new disk and mirror will automatically rebuild
5. In case of disaster recovery, shutdown server, put in backup disk to original location, start the system, add another disk to rebuild mirror
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тАО10-28-2004 05:35 AM
тАО10-28-2004 05:35 AM
Re: mirrored disk for disaster recovery on smartarray
please realize that this is not a supported operation on SmartArray controllers. It usually works with one disk array and when you put the disk back into it's original slot, but you should consider yourself lucky and still maintain standard backup procedures.
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тАО10-29-2004 12:07 AM
тАО10-29-2004 12:07 AM
Re: mirrored disk for disaster recovery on smartarray
To the question, yes, the only point with the SmartArray controllers is that since both the controller and the disk know who and where each other are, ID data on both, the back up needs to go back exactly where it came from, otherwise the procedure works famously.
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тАО10-29-2004 02:14 AM
тАО10-29-2004 02:14 AM
Re: mirrored disk for disaster recovery on smartarray
Regarding if it is or not a supported operation, I intented that surely as a bonus, not an alternative to standard backup procedures, as like the many software solution for disaster recovery :)
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тАО10-29-2004 04:49 AM
тАО10-29-2004 04:49 AM
Re: mirrored disk for disaster recovery on smartarray
What will be the behaviour of the Smartarray in this situation:
I have a 3 disks in RAID5 array with 2 logical drives on it, one for OS , the other for data.
The goal is to leave this array only for data (not for the OS boot).
To do this my idea is:
- put offline the actual disks , to release the first SCSCI IDs in the cage
- insert 2 new disks in the first two slots, create a new RAID1 and installing the OS on it.
- then inserting again the old RAID5 array in the new position (the controller will find the ID mismatch but correct it)
Is this possible not even simple as I have described it or I will seriously risk a loss of data?
Hope I'm not bothering you with too less of knowledge..