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Quick raid 5 question?

Ravendarat
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I want to use my old desktop as a home storage server, I have one 8tb drive right now that has the majority of my data on it, I want to buy two more 8tb drives and run raid 5 so I have approx 16 tb of space and a parity drive (I know I am not actually gonna have 16tb but im using easy numbers). Anyways can I set up the RAID 5 with my drive that already has data on it without losing it all or do I have to buy 3 new drives and then transfer the current 8tb contents over after building it? The drive I have is only 6 months old so I would prefer to just buy 2 more but if thats not an option than I guess Ill just add it in afterwards and have 24ish tb of storage

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6 minutes ago, Ravendarat said:

Anyways can I set up the RAID 5 with my drive that already has data on it without losing it all

No, you'll have to build the array from scratch.

 

7 minutes ago, Ravendarat said:

but if thats not an option than I guess Ill just add it in afterwards

Also not possible. I'm not aware of any RAID5 implementation that allows for expansion like that.

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17 minutes ago, Ravendarat said:

Anyways can I set up the RAID 5 with my drive that already has data on it without losing it all or do I have to buy 3 new drives and then transfer the current 8tb contents over after building it? The drive I have is only 6 months old so I would prefer to just buy 2 more but if thats not an option than I guess Ill just add it in afterwards and have 24ish tb of storage

What are you going to use to create the RAID array?

 

Hardware RAID cards support RAID level/type migrations so you could create an initial RAID 0 of 2 disks then move the data to it, add the old disk and then migrate the array to a RAID 5. However there are few, to none I know of, software RAID implementations that allow this equivalent function. Also fair warning I can't remember if migrating from RAID 0 to RAID 5 is supported either, I've only done RAID 1 to RAID 5 and RAID 5 to RAID 6 etc

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