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Slipstream a smaller drive with raid1?

E

ep0x73

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I have a older computer with 2x250 HDD's and was thinking of upgrading them to SSD but most are 240.

From what I read RST does not allow you to do this, you must have equal or larger drives.

You could use Acronis disk director to shrink the drives down and lose 10GB of space but it still might not work that well.

Now the 840 EVO which is 250 is a perfect match so if I wanted to go this route that would be the easiest match.

Remove one drive, slip the EVO in, rebuilt, wash and repeat.

Sound logical?
 
Do you want to keep the RAID1 after that? Or are you going to remove all HDDs after that?
AFAIK the Intel RAID implemenation does not do proper load-balancing in such a setup. For reads, nearly all of them should go to the SSD, but this setup would only direct half of them to the SSD, slowing it down to HDD level.

If you absolutely want to keep RAID1 you have to use two SSDs, otherwise all advantages would be lost.
Please note that Intel RAID1 does not support TRIM, and the 840 EVO is not well suited for operation without TRIM or a good chunk of overprovisioned space.
 
I would use two SSD's but as I've read TRIM is not supported in RST with RAID but the drives themselves under 7+ should still do trim?

Another choice is using rapid recovery and not having it automatic to keep a backup offline until you want to back it up.

The board is 6 years old though with 8.0 ROM so I don't recall that being a choice.

I have a Z97 board but it's not built yet, RR is certainly a choice with that platform.

That route one fast SSD and then a slower HDD just for keeping a copy of the OS.
 
ep0x73 said:
I would use two SSD's but as I've read TRIM is not supported in RST with RAID but the drives themselves under 7+ should still do trim?
Click to expand...
The drive has garbage collection, but this can only work with spare (~10% for the 250 GB EVO) and unwritten blocks. TRIM always needs the cooperation of the OS because the drive cannot know by itself which blocks the OS still needs and which can be discarded. The 840 EVO is a budget drive that utilizes specific techniques to keep it as fast as the 840 Pro for example for consumer workloads, but only if it is not completely filled at block level, which it eventually will be if used in RAID without TRIM.

ep0x73 said:
That route one fast SSD and then a slower HDD just for keeping a copy of the OS.
Click to expand...
And that will not work with the Intel RAID. The resulting RAID volume will AFAIK be almost as slow as two HDDs.
Linux software RAID for example has an option to use one specific drive mainly for reads and only write to both.
 
Well that sucks, so you really can't have a on the fly backup solution with SSD's unless you simply use Acronis to make an image and then once a month or so update it.

Least with raid1 the drives are the same speed as a single and usually reads are improved and writes are degraded.

Been using raid1 on multiple systems for about 8 years without issue and would like to continue but it does not seem so easy.

Kinda silly to buy a 250GB raptor when you can get SSD's for the same or just a bit more in price now.

raid0 is supported but it would be nice is raid1 with the latest 13.5 was there too
 
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