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Breaking a RAID 1 array
#11
Have you tried turning it off and back on? Cool
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#12
(03-15-2015, 05:15 PM)archangle Wrote: Have you tried turning it off and back on? Cool

Do you mean break the RAID making it JOBOD; then tell the RAID controller, they are again member disks?

Risky at best. Better to protect the two array drives and work from a clone. The one point of concern is getting back into AHCI mode.

My BIOS has two settings -- RAID or AHCI.
And SSD needs to be in AHCI to take advantage of TRIM which is an essential to SSD lifetime.

I also turn off Prefetch and Superfetch as they are not needed with an SSD. Also no reason to defrag an SSD.
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#13
ok, why go through all this? Isn't this what boot disks are for...? Or you know, excuse to get a new computer...
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#14
(03-15-2015, 07:21 PM)trailrider Wrote: ok, why go through all this? Isn't this what boot disks are for...? Or you know, excuse to get a new computer...

My disk speed is the limiting factor on this machine. This machine is less than 1 year old. And I need it. this is a Dell 8700 that I way over paid for. I have upgraded the Video card; added memory to 24GB; increased case airflow; went from a Seagate 1TB HDD to a pair of WD Black 1TB HDDs in RAID mirror. I wish I would have gone straight to SSD.

I do have a new machine that I build my way. However, when deployed, it will not be as a replacement for this machine. I'll post a photo through the case side window soon.


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#15
I could not get this to not BSOD. I cloned an HDD to the SSD. I connected the SSD to SATA0 with no HDDs connected.
It booted into windows. But, I need ACHI so I can run TRIM for the SSD. I did a regedit to set iaStorF and iaStofA run parameter to 3 (no start.)
I set msahci's run parameter to 0 (start at boot.) I shut down; and upon restart, I went into the BIOS and set SATA mode to AHCI in BIOS.
It then BSODed. No way to recover from it.

So, I put the 2 HDD RAID disks back in and set SATA mode in BIOS back to RAID. Another morning wasted. I guess this machine is going to stay RAID 1 with 2 HDDs.
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#16
I would try it without the reg edits. After confirming it comes up into Windows, just shut down and change the BIOS from RAID to SATA and let Windows figure it out.
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#17
(03-23-2015, 02:51 PM)LanceC Wrote: I would try it without the reg edits. After confirming it comes up into Windows, just shut down and change the BIOS from RAID to SATA and let Windows figure it out.

That might work. A suggestion that it might is from a mistake I made when I put the HDDs back in. I forgot to switch the BIOS from AHCI to RAID -- Windows was starting and I was saying: "Oh Hockey Sticks!"
But, it booted into Windows. I then restarted and changed the BIOS back to RAID; and had back my initial configuration.

It's story for another morning when I feel like trying it. I've already done a single pass wipe of the SDD -- so, I'd have to clone it again. That takes 2 hours.
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#18
Um...

If it successfully booted into Windows with the HDDs in it and set to AHCI, weren't you done? I thought that was what you were trying to do, break the RAID but keep the same system from the original HDDs.

When you rebooted and changed it back to RAID, did it regenerate?
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#19
(03-23-2015, 07:22 PM)LanceC Wrote: Um...

If it successfully booted into Windows with the HDDs in it and set to AHCI, weren't you done? I thought that was what you were trying to do, break the RAID but keep the same system from the original HDDs.

When you rebooted and changed it back to RAID, did it regenerate?

That's was I was trying to do; and end up with the system on a 1TB SDD.

When I could not get the cloned SDD to work after regedit and switch to AHCI, I put the 2 HDDs back in. It did accidentally reboot in AHCI to the two drives. Likely from SATA0 Port. When I then shutdown and switched BIOS back to RAID, I saw the array screen during boot.

The array did not require rebuilding. I just ran the IRST verify on the array.

ergo: Your suggestion 3 posts up, may just work.
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#20
Yeah, I believe it will. As I said a while back, I've successfully done it before.
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