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Raid help

Cukumbermouth
By Cukumbermouth
in Storage Devices
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Go to solution Solved by Sheldon_King,

So if i raid a 120 and 240 together i can only use the 120 or 240. if i get a 120(another) and raid that would i end up with 240GB?

No, that is not what will happen. Look at it like this: Your smallest drive will be 120GB.  If you were to run RAID 1 (redundancy) the 240GB drive would backup the 120 and you would still have 120GB of space.  If you were to run RAID 0 (stripped) you would get a maximum of 240GB of space (double the smallest drive) and more or less double the speed also.  If you were to run a second 120GB drive you would end up with 240GB also, double the 120 and double the read and write speed.   The best solution in your case is to use the 240GB drive as an expansion as you end up with 360GB of space, without the risk associated with RAID 0 (and without the need to reinstall the OS which would be required with any RAID setup).

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I have a samsung 840evo and its getting full. could i raid a 120Gb model witha  240Gb model?

You can do this but you would end up with only 120 or 240GB of storage space (120GB if RAID 1 and 240 for RAID 0).

 

The best option in this situation is to use the two drives independently.

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I'm pretty sure to do a raid both drives have to be the same size. ( I could be wrong, don't know a lot about raids)

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I'm pretty sure to do a raid both drives have to be the same size. ( I could be wrong, don't know a lot about raids)

No, that is not true. You could easily raid a 120GB and 6TB drive together, not that it would do you much good.  The way RAID works is it ends up with a multiple of the smallest drive as the final storage space. (where x is the smallest, storage is RAID 1= 1x, RAID 0=#x, and RAID 10 is (#x / 2). There is also 5,6,50, and 60)

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No, that is not true. You could easily raid a 120GB and 6TB drive together, not that it would do you much good.  The way RAID works is it ends up with a multiple of the smallest drive as the final storage space. (where x is the smallest, storage is RAID 1= 1x, RAID 0=#x, and RAID 10 is (#x / 2). There is also 5,6,50, and 60)

So if i raid a 120 and 240 together i can only use the 120 or 240. if i get a 120(another) and raid that would i end up with 240GB?

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So if i raid a 120 and 240 together i can only use the 120 or 240. if i get a 120(another) and raid that would i end up with 240GB?

No, that is not what will happen. Look at it like this: Your smallest drive will be 120GB.  If you were to run RAID 1 (redundancy) the 240GB drive would backup the 120 and you would still have 120GB of space.  If you were to run RAID 0 (stripped) you would get a maximum of 240GB of space (double the smallest drive) and more or less double the speed also.  If you were to run a second 120GB drive you would end up with 240GB also, double the 120 and double the read and write speed.   The best solution in your case is to use the 240GB drive as an expansion as you end up with 360GB of space, without the risk associated with RAID 0 (and without the need to reinstall the OS which would be required with any RAID setup).

Spoiler

Desktop <dead?> 

Spoiler

P8P67-WS/Z77 Extreme4/H61DE-S3. 4x4 Samsung 1600MHz/1x8GB Gskill 1866MHzC9. 750W OCZ ZT/750w Corsair CX. GTX480/Sapphire HD7950 1.05GHz (OC). Adata SP600 256GB x2/SSG 830 128GB/1TB Hatachi Deskstar/3TB Seagate. Windows XP/7Pro, Windows 10 on Test drive. FreeBSD and Fedora on liveboot USB3 drives. 

 

Spoiler

Laptop <Works Beyond Spec>

Spoiler

HP-DM3. Pentium U5400. 2x4GB DDR3 1600MHz (Samsung iirc). Intel HD. 512GB SSD. 8TB USB drive (Western Digital). Coil Wine!!!!!! (Is that a spec?). 

 

 

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