September 26, 201015 yr Hi, Finally got all my parts and just want to check what setting to have on my BIOS. I have IDE (emulated) RAID and AHCI available for my drives. All my drives are SATA connections. I read somewhere a while ago it should be AHCI but just want to confirm which will be best. Thank you.
September 26, 201015 yr I have mine set up as AHCI. Cant remember where i read that here in forums. If i can find it ill link the post.
September 30, 201015 yr Can you switch it from SATA RAID to AHCI after you have already setup unRAID? Or like with Windows, it won't work without a reinstall?
September 30, 201015 yr Normally yes. I you want to be 100% sure it has no impact on your hard drives, unnassign the hard drives on those ports, assign them to other ports, change the setting from RAID to AHCI and assign them back. But I think the step above is unnecessary.
September 30, 201015 yr Yes, you can switch it. It's not a reinstall, but might require reconfiguration, unRAID may be able to detect which array slot the drives belong to based off drive ids, so a manual reconfiguration may not even be required. To be prudent, take print a screen shot of your devices page listing the drive ids and what array slot they're assigned to. Then reboot into BIOS, switch to AHCI, then boot into unRAID. The physical drives should switch from being /dev/hd# to /dev/sd#, but unRAID will continue to provide /dev/md#/ and /mnt/disk# and /mnt/user. If need be, update the array configuration so the drives are in the same array slots, and start the array.
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