[kevindd992002]

My future plan would be to use my SSD as an OS drive and put two HDDs in RAID0 as a Storage drive. In order to do this, I should set the BIOS into RAID mode. TRIM doesn't work with RAID AFAIK. In this case (BIOS set to RAID), does the SSD still benefit all the features of AHCI and will TRIM still work since it is not part of the array?

 

[JedixJarf]

Trim works in RAID0 on latest intel RST drivers.

 

[ShortySmalls]

i have that same setup and TRIM works

i have a 60gb SSD and 2 500gb HDD's in raid 0 for storage

 

[Chris13002]

Quote:

Originally Posted by JedixJarf Trim works in RAID0 on latest intel RST drivers.

? Where do you see this at?

I was under the intention that it was not possible at this time... Too complex on a RAID 0 array...

http://downloadcenter.intel.com/Deta...eng&iid=dc_rss
6-08-2011

But YES, you can have a RAID 0 array on the mechnicals, while still maintaining the single SSD with TRIM and GC enabled for recycling techniques.

RAID 0 and TRIM on an SSD are not possible at the moment...

 

[kevindd992002]

Great to know.

But with that setup, the SSD is still in AHCI mode?

Also, which is better between RAID0 and RAID5?

 

[Chris13002]

Quote:

Originally Posted by kevindd992002 Great to know. But with that setup, the SSD is still in AHCI mode? Also, which is better between RAID0 and RAID5?

yes, keep in AHCI mode...

Raid 0 is simply striping, meaning one drive failure will lose everything...
Raid 5 distributes among all drives in the array...

You need at least 3 same drives for RAID 5 and you won't lose all the data by one drive failing (just a slowdown)...

 

[kevindd992002]

Quote:

Originally Posted by Chris13002;15214556
yes, keep in AHCI mode...

Raid 0 is simply striping, meaning one drive failure will lose everything...
Raid 5 distributes among all drives in the array...

You need at least 3 same drives for RAID 5 and you won't lose all the data by one drive failing (just a slowdown)...

So you can still "hot plug" the SSD even though BIOS is in RAID mode?

Which would be faster then, RAID5 or RAID0? Are both recommended to perform for Storage drives?

 

[JedixJarf]

Raid 0 is NOT recommend for storage as there is 0 redundancy. Go raid 1 or raid 5.

 

[JedixJarf]

Quote:

Originally Posted by Chris13002;15214514
? Where do you see this at?

I was under the intention that it was not possible at this time... Too complex on a RAID 0 array...

http://downloadcenter.intel.com/Detail_Desc.aspx?ProductID=2101&DwnldID=20215&lang=eng&iid=dc_rss
6-08-2011

But YES, you can have a RAID 0 array on the mechnicals, while still maintaining the single SSD with TRIM and GC enabled for recycling techniques.

RAID 0 and TRIM on an SSD are not possible at the moment...

Raid 0 and trim does work thanks.

http://www.bit-tech.net/news/hardware/2010/03/23/intel-releases-trim-for-raid/1

 

[kevindd992002]

Ok. But is RAID5 faster than RAID0?

 

[JedixJarf]

Quote:

Originally Posted by kevindd992002;15217339
Ok. But is RAID5 faster than RAID0?

Not even close, Raid 5 is slower than raid 1 and raid 0.

 

[kevindd992002]

Quote:

Originally Posted by JedixJarf;15217352
Not even close, Raid 5 is slower than raid 1 and raid 0.

Ah. But RAID5 is also striping data, right? Why would it be slower than RAID0?

Also, my question regarding TRIM is if TRIM works for a single SSD even when the BIOS is set to RAID? As stated in the OP, I'm not planning on RAIDing multiple SSDs. I'm only asking if the SSD is still in AHCI mode (TRIM works) EVEN THOUGH the BIOS is in RAID mode and I have multiple HDDs in an RAID array?

 

[JedixJarf]

Yes, it works in raid mode. And raid 5 is technically a stripe but it is parity based. The reason it is slow is because of all the data that has to be written to the parity drive first.

 

[kevindd992002]

Even hot plug works with the SSD?

Ah. So technically, RAID2 and RAID3 are also slower than RAID0 because they are striping with parity?

 

[JedixJarf]

Right, and Raid 2 and 3 are old and obsolete, you cant even get a controller to support that these days.

 

[kevindd992002]

so technically RAID0 is still the fastest nowadays?

 

[JedixJarf]

Quote:

Originally Posted by kevindd992002;15218158
so technically RAID0 is still the fastest nowadays?

It always was and always will be, but it has the highest potential for data loss. One of your drives goes bad you loose everything. The fasted and safest method would be a raid 10 (1+0) this will mirror your stripe, giving you raid 0 speeds with raid 1 redundancy. This requires a minimum of 4 drives.

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