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Author Topic: Migrate from Raid1 to Separate volume  (Read 9375 times)

bbksimsky

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Migrate from Raid1 to Separate volume
« on: August 18, 2010, 06:35:48 PM »

Hello,

I have dns 323 with 2x1To raid1 hard drive. I want use these HD in two volume and keep data in one HD. I don't have external HD to backup my data. Can I migrate without lost my data in my case?

My apologies for bad speaking.
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jamieburchell

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Re: Migrate from Raid1 to Separate volume
« Reply #1 on: August 19, 2010, 01:13:54 AM »

You would need to turn off the DNS-323 and take one of the hard drives out. Attach it to your computer either directly or by using an external USB enclosure. Then, if you are using Windows, you will need either of these tools to read the Linux ext2/3 partitions:

http://sourceforge.net/projects/ext2fsd/
http://www.fs-driver.org/

The EXT2IFS software at fs-driver.org doesn't work on Windows 7.

Then, using the DNS-323 web interface, format and convert the remaining drive to a standard drive. Once this is done, use your computer to copy the data from the removed drive back to the DNS-323.

Once this has been done, remove the partitions/zero the removed drive before re-inserting in to the DNS-323. This is important, otherwise will likely confuse the DNS-323 in to thinking you've inserted part of a RAID array.
« Last Edit: August 19, 2010, 01:15:45 AM by jamieburchell »
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!!!!clarkkent

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Re: Migrate from Raid1 to Separate volume
« Reply #2 on: August 19, 2010, 01:24:01 AM »

Excellent suggestion, jamieburchell!

In case you do not want to use the mentioned tools to read the Linux partitions, you can do the following:

1) Copy your files through the DNS-323 to your computer.
2) Format both drives as two separate disks.
3) Move the copied files (in step 1) to one of your newly formatted drives.
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jamieburchell

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Re: Migrate from Raid1 to Separate volume
« Reply #3 on: August 19, 2010, 11:32:32 AM »

That would be easier, but I assumed he didn't have the required capacity...
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bbksimsky

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Re: Migrate from Raid1 to Separate volume
« Reply #4 on: August 19, 2010, 01:19:53 PM »

Hi, thank you for the answer. Because my bad english speack you don't understand my first post. I , i have not enouth free disk space on my computer to backup all DNS323's data

Finally, I do this:

1/ I remove the DNS323's left disk
2/ I plug this disk in my PC and format it in NTFS
3/ Copy data from DNS323 to My computer
4/ Format DNS323's right disk in single volume
5/ Copy data from my computer to DND323
6/ And plug the left disk and format in second single volume
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jamieburchell

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Re: Migrate from Raid1 to Separate volume
« Reply #5 on: August 19, 2010, 01:35:41 PM »

That would work too, but would have taken longer. I don't think you fully understood my suggestion - you wouldn't have needed any extra capacity.
« Last Edit: August 19, 2010, 01:39:57 PM by jamieburchell »
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bbksimsky

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Re: Migrate from Raid1 to Separate volume
« Reply #6 on: August 19, 2010, 02:38:17 PM »

I read again your post and you're right but the both ext drivers aren't certified for windows 7 64bits...

thanks again for your support.

Copy: 22 hours remaining with a gigabit switch... ouch!
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jamieburchell

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Re: Migrate from Raid1 to Separate volume
« Reply #7 on: August 19, 2010, 02:58:24 PM »

FYI ext2fsd works fine on Windows 7 64bit
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gunrunnerjohn

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Re: Migrate from Raid1 to Separate volume
« Reply #8 on: August 19, 2010, 03:19:50 PM »

FYI ext2fsd works fine on Windows 7 64bit
Using that here in that environment, works fine for me as well. :)
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Remember: Data you don't have two copies of is data you don't care about!
PS: RAID of any level is NOT a second copy.

fordem

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Re: Migrate from Raid1 to Separate volume
« Reply #9 on: August 20, 2010, 07:16:02 AM »

For what it's worth - there is a much simpler way - remove either one of the disks from the DNS-323, format the remaining one as a standard volume and then replace the one that was removed.
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RAID1 is for disk redundancy - NOT data backup - don't confuse the two.

jamieburchell

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Re: Migrate from Raid1 to Separate volume
« Reply #10 on: August 20, 2010, 07:27:31 AM »

For what it's worth - there is a much simpler way - remove either one of the disks from the DNS-323, format the remaining one as a standard volume and then replace the one that was removed.

Won't the one that was removed have information on the system partitions identifying it as part of a RAID array?
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fordem

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Re: Migrate from Raid1 to Separate volume
« Reply #11 on: August 20, 2010, 09:09:11 PM »

Won't the one that was removed have information on the system partitions identifying it as part of a RAID array?

When you're done thinking it through - give it a shot - and then let me know whether or not it worked for you.
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RAID1 is for disk redundancy - NOT data backup - don't confuse the two.

jamieburchell

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Re: Migrate from Raid1 to Separate volume
« Reply #12 on: August 21, 2010, 11:20:04 AM »

When you're done thinking it through - give it a shot - and then let me know whether or not it worked for you.

Well, I don't see how that works hence the question.
Personally, I'd rather have each disk with the correct mode information stored on it.
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