- Apr 11, 2011
- 3
- 0
- 18,510
Ok firstly here is my situation...
I bought 3 2TB Seagate Barracuda XT and i want to put them in a Raid 5 setup, primarily for the redundancy...
Ive plugged them into my mobo (Asus Sabertooth p67) specifically using 3 SATAII ports since there is only 2 SATAIII ports on that onboard controller... no problems so far...
I set the Sata mode in the bios to raid... Pressed Ctrl-I at startup and configured my raid5 setup with 64kb strip size...
no problems so far...
So i enter Win 7 and goto Computer > Manage > Disk-management and it immediately asks me if i want MBR or GPT partioning... it also says that GPT is recommended for disks larger than 2TB so I choose GPT.
No problems so far...
Now for testing the setup I start by copying a large 1080P bluray image from my WD raptor drive to the Raid-5 setup and at first it seems good. transfer starts at around 140MB/s, but quickly reduces itself all the way down to a crawling 22MB/s.... Which I have a hard time accepting since i expected at least 80+ MB/s for a setup like this...
Now for the sake of trying I delete the drive in Disk-Management and convert it to MBR partioning which only allows for a 2TB drive, but with this setting I at least reach 70MB/s write speed to the drive... Of course this is still unacceptable because I cant utilize the last 2TB of the drive...
What am I doing wrong??? or is this performance on GPT setting to be expected...
<--- Me going crazy...
What can i do to get this drive up to speed...
Hope u guys can help...
and thx in advance..
I bought 3 2TB Seagate Barracuda XT and i want to put them in a Raid 5 setup, primarily for the redundancy...
Ive plugged them into my mobo (Asus Sabertooth p67) specifically using 3 SATAII ports since there is only 2 SATAIII ports on that onboard controller... no problems so far...
I set the Sata mode in the bios to raid... Pressed Ctrl-I at startup and configured my raid5 setup with 64kb strip size...
no problems so far...
So i enter Win 7 and goto Computer > Manage > Disk-management and it immediately asks me if i want MBR or GPT partioning... it also says that GPT is recommended for disks larger than 2TB so I choose GPT.
No problems so far...
Now for testing the setup I start by copying a large 1080P bluray image from my WD raptor drive to the Raid-5 setup and at first it seems good. transfer starts at around 140MB/s, but quickly reduces itself all the way down to a crawling 22MB/s.... Which I have a hard time accepting since i expected at least 80+ MB/s for a setup like this...
Now for the sake of trying I delete the drive in Disk-Management and convert it to MBR partioning which only allows for a 2TB drive, but with this setting I at least reach 70MB/s write speed to the drive... Of course this is still unacceptable because I cant utilize the last 2TB of the drive...
What am I doing wrong??? or is this performance on GPT setting to be expected...
<--- Me going crazy...What can i do to get this drive up to speed...
Hope u guys can help...
and thx in advance..
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