Since AHCI was created by Intel, this functionality is used by their chipsets only and computers that do not use the Intel chipset are unable to use AHCI, unlike RAID which has been pretty standardized and can be obtained and used by a wide variety of manufacturers.
There are configuration definitions that indicate how the RAID array is meant to work. RAID 1 duplicates the content of one drive to another so that in case one fails, data is still retained in the other drive.
There are several more configurations defined that either improves performance, reliability or both. In terms of features, it basically exposes the same feature set that is available in AHCI making them identical in single disk applications. RAID truly shines when you go into multi disk configurations where you can utilize its more advanced features because AHCI is unable to operate in this mode.
But using RAID can become very expensive once you start adding more disks into your array. So again, for Dell I guess it makes sense to just use RAID mode everywhere for consistency, since they of course do sell some systems with Optane and Smart Response and Rapid Start in the past , as well as other systems that actually do have multiple disks and therefore support actual RAID setups.
And the downsides don't really matter to them. But for individual users performing a clean install, switching to AHCI means you don't have to worry about providing an Intel RST driver, you can use Linux if desired, and you can use a vendor-provided NVMe driver if desired and available.
However, this setting is only really meant to be changed before reinstalling an OS. Apparently it's possible to work around this by booting into Safe Mode ONCE after making the switch, which will allow Windows to start and reconfigure itself. After that, you should be able to boot normally. View solution in original post. Thank you jphughan , a great answer! I'm guessing these systems will still need to have RAID on?
But at least on other Dell systems where I've seen Optane offered, the storage option on the system specifically mentions Optane. But maybe that's changing? Perhaps so. For what it's worth I found that I had the Intel Optane software installed on my by default even though I didn't have an Optane drive.
I doubt anyone will feel that in daily use. AlexusR , Mar 24, AMK likes this. Thing is, this benchmark is not very reliable so this percentage might be just indication of margin of error. I just ran it several times, one after another. It produced different results for this particular section. Here's an example:. PNG File size: AMK and jaybee83 like this. Vasudev , Mar 25, Step 2.
Select a drive that you want to measure from the drop-down menu and click on the Start button. Step 3. Then you need to wait a moment to get the disk performance test result.
This test includes much important information such as transfer size, sequential reading and writing speed, etc. This answer depends on the type of drive. Well, the interface of your SSDs has an impact on the performance.
Generally speaking, RAID is widely used to manage your multiple hard disk drives, which can improve the performance of your computer and provide fault tolerance features. So, if you are using multiple hard drives, RAID may be a better choice. Some users concern the performance will be affected when adding a new drive. For these questions, you just need powerful software to manage the multiple drives. Here we take the copy volume feature for example.
Buy Now Buy Now. Open this program to get its main interface, and then select the volume that you want to copy and click on the Copy Partition feature on the left pane. Then select the target volume that you want a copy to and click the Next to continue.
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