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tomsimmons78
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December 18th, 2024 21:23
XPS 15 9520 RAID 1
I have an XPS 15 9520 that had a single drive when received from Dell. The settings in BIOS were with the RAID enabled, everything worked fine.
The the hard drive died, as a precaution the single drive has been replaced by a pair of Crucial P310 drives which I have configured as RAID 1 (mirror). I initially did this through the BIOS - or at least the tool you access from the F12/BIOS area. When complete I noticed the performance was pretty poor. I check an identical 9520 (we have 8) that had the single original drive (configured again as RAID from factory - all 8 machine are), and performance was less than half.
I then undid the RAID set up using the Intel tool in Windows (no BIOS changes) and tested and a single Crucial drive marginally out performs the original drive in the other machine. Confused, I recreated the RAID 1 using the Intel tool in Windows, rebooted and tested again, and once more the performance is less than half of a single drive.
All updates BIOS and OS (Windows 11) are applied, so what's the story? How are you meant to do this, because a RAID setup that slashes performance by that much isn't worth having!
Tom
tomsimmons78
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Posted December 18th, 2024 22:15
Thanks for your quick reply, I didn't realise that it was solely software based and that writing the same thing to 2 drives on different channels would take twice as long.
I've got a spare drive now!
(edited)
ejn63
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Posted December 18th, 2024 21:57
It's not a surprise, since the data has to be written to two drives -- and this isn't true hardware RAID.