Small discrepancies are one thing but the large drop in 4K write (3MB/s down from 69MB/s) and write acc. time (1.310ms up from 0.198ms) worries me a little. The biggest difference in my system between those two benchmarks is a reformat and the installation of a 5.25" to 4x2.5" backplane which now houses my boot drive.
Here's my full system if it matters:
ASUS P8Z68-V Deluxe
MSI Twin Frozr II HD 6950
G.Skill Ripjaw 16GB
Crucial M4 128GB
Several supplemental drives
Zalman Z9 Mid-Tower
More about :explaining large discrepancy ssd benchmarks reformat
Can I use windows backup to save an image of my boot drive, use gparted to wipe the drive, and then use my installation disk to restore the image? If I have to reinstall everything from scratch then I will, but I'd like to avoid that if I can.
what do you mean it didn't work?
you mean that you did as what they said and still the same results?
I mean that I wasn't able to do what they said. I backed up with Acronis, made the GParted boot disk, booted into GParted, deleted the old partitions, and then tried to wipe the drive in the terminal.
The "hdparm --security-erase NULL /dev/hda" command (I also tried several variations) did not work. Despite the --security-erase flag it was still asking for a password which is strange because there is no password. I also tried to get root access but the "su -" command was also asking me for a command. (And yes, I tried "sudo hdparm --security-erase NULL /dev/hda" but that also asked for a password.)
you would have to 'hot plug' the ssd if you get the 'frozen' error or you can't remove the password.
while the system is under ahci, place the parted magic .iso in your optical drive, then power down.
remove the signal cable from the drive (leaving the power connector attached), and be ready to re plug the signal cable.
power up the system, and after your bios posts, and you first see the first splash screen of parted magic (asking you if you want to run in ram), re plug the signal cable into the ssd.
when you get to parted's gui, you should have an unlocked drive.
i had the same problem with intel 320 series and it worked! and will work for you!
Holy crap it actually worked. After using parted magic my speeds are almost back where they were when the drive was new. My 4K write speeds are a bit lower at 60 MB/s but I'll certainly take it. Thanks armand_h.
For anyone reading this thread in the future - gparted didn't work at all but parted magic worked fine.