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тАО09-26-2004 08:02 AM
тАО09-26-2004 08:02 AM
Switching from RAID 0 to RAID 1 on Smart Array
Using the ACU 7.16.2.0, I tried to add this drive to the array (which succeeded, by using the express configuration) but there was not an option to configure the RAID level as RAID-1. So now I have two disks that are both RAID-0 and there doesn't appear to be a way to change this- if I choose "Migrate Drive" selecting RAID-1 is not an option for either logical drive. Am I missing something?
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тАО09-27-2004 03:18 AM
тАО09-27-2004 03:18 AM
Re: Switching from RAID 0 to RAID 1 on Smart Array
You missed the option at the time when you added the hdd. Now you have two hdds in RAID 0 so it is not possible to go back to a RAID 1 with those hdds. You're only three options now are to keep running on Raid 0 as is, blow away your raid, recreate RAID 1 and restore from backup or buy a 3rd drive and migrate to RAID 5.
For future reference you hightlight the array you want to either expand or migrate (migrate in your case) then choose the hdd you want to add to the array,
Then when you create your logical drive you change the raid status. I believe you chose Extend Size option which only adds on the space and leaves your raid config the same.
Ciao,
Greg
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тАО09-27-2004 05:36 AM
тАО09-27-2004 05:36 AM
Re: Switching from RAID 0 to RAID 1 on Smart Array
Are you saying there is now data on that second drive? The OS still only sees the orginal amount of capacity and shows the drive in Disk Management- but it is not formatted. They show up in the ACU as separate logical drives (though are in the same array). Can I clarify- if I were to delete the second drive, there would be data loss? What info could be on there if it's not writing parity? Thanks.
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тАО09-28-2004 05:48 AM
тАО09-28-2004 05:48 AM
Re: Switching from RAID 0 to RAID 1 on Smart Array
If you look at this diagram, even though there is no parity involved, the data gets striped across the drives in a raid 0. http://www.acnc.com/04_01_00.html
So when you added the second hdd and added capacity, you spread the data out over the two hdds. No going back without deleting and recreating the array. Only option is to add another hdd and change raid levels to raid 5.
I just went through the steps and verified those options.. It will also show up as unformatted space in disk manager until you claim it and format it. You can create a new partition or use diskpart from MS to extend your partition.
Greg
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тАО10-11-2004 09:39 AM
тАО10-11-2004 09:39 AM
Re: Switching from RAID 0 to RAID 1 on Smart Array
I decided to buy a third drive and migrate to RAID-5. I put the drive in and it now shows up as in the Array as "unused space". Here's the current config:
Log Drive 1 69459 MB(RAID-0)
Log Drive 2 69459 MB(RAID-0)
Unused Space 69461 MB
Now, I guess the next step is to Migrate the logical drives to RAID-5. Am I correct that I am to do this one drive at a time? I went through the wizard and this is what it showed after I selected to Migrate Log Drive 1:
Log Drive 1 69459 MB (RAID-5)
Log Drive 2 69459 MB (RAID-0)
Unused Space 34731 MB
I assume that will copy the requisite data to the third drive and when it is complete I can migrate Log Drive 2?
Sorry to ask so many questions, I am just being careful. Also, again I want to confirm that this will not affect data in any way. (Yes, I have a backup!)
Thanks!
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тАО10-11-2004 10:47 AM
тАО10-11-2004 10:47 AM
Re: Switching from RAID 0 to RAID 1 on Smart Array
That would be correct! you are almost done.. :)