12-02-2011 11:06 AM - edited 12-02-2011 05:29 PM
Hello, I am a prospective buyer for the (ST750LX003) Momentus XT 750 GB HDD w/8 GB SSD.
My plan was to take two (2), three (3), or four (4) Momentus XT drives and stripe them into a RAID-0 array. After doing only a tiny bit of research on the issue, I figured I had better sign up to get the questions asked and hopefully answered before I make any purchases.
My suspicion based upon reading other articles is that the Momentus XT is either (a) not suited for any kind of RAID, or (b) can be put into a RAID, but with a plethora of problems.
Question (1): (a) Can Momentus XT 750 GB (ST750LX003) function in a RAID-0 Array, (b) if yes, what problems are associated with doing so?
Question (2): If the Momentus XT 750 GB (ST750LX003) cannot be placed into a RAID configuration, does Seagate plan a remedy for this?
Comment (1): If I could not use the Momentus XT 750 GB (ST750LX003) in a RAID-0 configuration, I wouldn't have any use for it.
Comment (2): To me, a RAID-0 config with 2-4 drives would supply and satisfy all of my gaming, editing (image, video and audio) and storage needs, and then some.
Comment (3): If I'm going to drop $200-$300 per drive, I want the best of both worlds. If not, I'll just get a top of the line SSD and risk the problems this market has with reliability.
I also wanted to add that this new setup will be using Windows XP 64-bit as the OS.
12-02-2011 01:39 PM
AFAIK, there is no technical reason why the XT2s cannot be used in RAID.
But lets have Seagate give the official answer.
I have 2 MT2s here, but am too lazy to do a test to see for myself.
12-03-2011 07:41 AM
From this post, the user suggest that Seagate isn't supporting RAID for the MXT1. Also take note that it took about 2 months to get this reply. Again this say nothing for the new drive, since the drive is recently out, I'm guessing that Seagate as planned to make more resource available to reply to potential costumer inquiry. Maybe you should try to call customer support if you don't want to wait for an unofficial reply on this forum.
12-03-2011 11:45 AM
Certain models of Asus G 7x series laptops come with dual 500gb MX1s from the factory.
I would be profoundly surprised if those drives cannot be RAIDed.
If you are asking if you can plug it into any legacy RAID arrays and make it work... the answer is ... no or risky.
If you are asking about a late model RAID setup (no more than 1 year old hardware and drivers), I'd say the chance is pretty good.
Having said that... many SSDs are also sold without explicitly supporting RAID use.... and they do work... more or less.
A lot depends on how much the RAID implementation has hard coded into it optimization for "hard" drives and whether that interferes with (e.g. SSD) or Hybrids.
On the older OSes pre TRIM that was a major issue.
See my thread re Benchmarking --- and so on.
12-05-2011 02:04 PM - edited 12-05-2011 02:05 PM
I can't say for sure which it is, XT1 or XT2. Here is a link to the hybrid HDD I am thinking of buying:
Suffice to say, I need to know soon because I want to put my computer together soon. Withstanding some other parts, the HDDs are the final pieces waiting to be purchased.
12-05-2011 02:53 PM
That is the XT 2 (750gb) 2nd generation with the SATA 6.0gbs interface.
Be sure you turn off all power saving / APM stuff.
It should work fine --- I am testing the same here in a week or so.
12-05-2011 04:16 PM
The link you gave is the Momentus XT2, you can validate this by yourself with the product model from Seagate page.
In this case this is st750lx003.
Come to think of it, is there any Seagate official announcement that this is a new MXT?
12-07-2011 08:14 AM
So far, no good.
So, it is an XT2, which is kind of what I thought. Yet, no official response on the matter.
For any of those who are running in a RAID-0 setup:
1. Does it work?
2. Any special parameters need disabling (i.e. APM)?
3. Do you notice any delays or is it working as expected?
Any information helps.
As mentioned, I'm a prospective buyer. By no means will I drop $200+ per drive and not have the advertised performance.
12-08-2011 06:50 AM - edited 12-08-2011 08:25 AM
As far as I know, there's no way of permanently disabling the APM in this drive. It gets back to 128 with every restart of the machine.
APM and power management / saving can be disabled in BIOS and also OS and Applications.
e.g. sleep / suspend etc.
Do that for a start.