Raiding SSHD Mechnaical Drive and SSD?

[Spec2jeti]

So I'm going to buy a Samsung SSD and I'm going to try and raid it with a Seagate 500gb SSHD. Is there anything wrong with doing that? Anything I should take in caution? 

[Oshino Shinobu]

What type of RAID? 

 

EDIT: It's a bad idea regardless of the type, but I'll be able to tell you why if I know what RAID type you plan on using.

[Enderman]

A) don't do raid

B) don't use different drives if you need to do raid

C) don't do raid

[xXarons]

if you want raid 0

 

You should never create a RAID-0 array with a SSD and a HDD. The RAID-0 array should be all SSDs or all HDDs.

The Read/Write performance of a RAID-0 is based upon the drive in the array with the slowest Read/Write speeds. So if you RAID-0 a SSD and a HDD you're not using the fast speeds of the SSD that you bought it for.

The total capacity of a RAID-0 array is based upon the drive in the array with the smallest capacity. So if you RAID-0 a 64GB drive and a 1TB drive then your RAID array's total capacity (before formatting) will be 128GB (64 x 2).

[Oshino Shinobu]

1 minute ago, xXarons said:

The Read/Write performance of a RAID-0 is based upon the drive in the array with the slowest Read/Write speeds. So if you RAID-0 a SSD and a HDD you're not using the fast speeds of the SSD that you bought it for.

It's worth noting here that for small size writes, the speed will be improved due to the SSD part of the SSHD. Doesn't make up for all the other issues, but still something to note. 

[PenPoint]

Bad idea.

If you had an HDD and an SSD, you could arrange them into one single drive throught Intel RST but... no good in this situation.

[NTDaws]

25 minutes ago, xXarons said:

if you want raid 0

 

You should never create a RAID-0 array with a SSD and a HDD. The RAID-0 array should be all SSDs or all HDDs.

The Read/Write performance of a RAID-0 is based upon the drive in the array with the slowest Read/Write speeds. So if you RAID-0 a SSD and a HDD you're not using the fast speeds of the SSD that you bought it for.

The total capacity of a RAID-0 array is based upon the drive in the array with the smallest capacity. So if you RAID-0 a 64GB drive and a 1TB drive then your RAID array's total capacity (before formatting) will be 128GB (64 x 2).

This isn't a normal hard drive, this is a NAND Flash SSD installed on top of a hard drive. The way it works is that it will first send all files to the SSD and then to the hard drive. 

[Spec2jeti]

Well thank you all. I guess I won't be Raiding my drives. I was planning Raid 0. But I don't think I will. Thanks again for your help. 

[Spec2jeti]

3 hours ago, Oshino Shinobu said:

What type of RAID? 

 

EDIT: It's a bad idea regardless of the type, but I'll be able to tell you why if I know what RAID type you plan on using.

I was planning Raid 0. 

[Oshino Shinobu]

44 minutes ago, Spec2jeti said:

I was planning Raid 0. 

Then it's a bad idea (all RAID options with such different drives are a bad idea). Other than small writes, you'll be decreasing the speed of the SSD and increasing your chances of losing data.