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Can i use PM951 and SM9651 in raid 0?

post #1 of 5
Thread Starter 
Hello everyone,
i have lenovo thinkpad P50 running windows on SD8SN8U512G1122 (SANDISK X400 512GB M.2 2280) , and a friend of mine gave me a slightly used
SAMSUNG PM951 and SM951
i did a little reading on the web and found out that these ssd'd are way faster than the x400,
my question is if i can use both the sm951 and the pm951 in raid 0? or do i need them to be twins ? both pm or sm ?
many thanks.
post #2 of 5
1.) Yes, they will work together in a RAID 0 array.
2.) Performance will be limited to the speed of the slower drive.
3.) Size of the array will be twice the size of the smallest drive.
4.) If you want to boot up from the array (ie make it the boot device in the BIOIS) be aware that setting up a bootable RAID 0 can only be done during a Windows install - there are workarounds, but they're messy.
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
MouseAudio
Logiteck G400s none 
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My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
MouseAudio
Logiteck G400s none 
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post #3 of 5
Thread Starter 
i managed to create the raid volume and installed windows 10 on it.
i tested the speed through crystaldiskmark and got these results
is this ok?
and another question, i thought that in raid 0 the speed will be double but the size stays like i have only one drive,
but i see one drive with a doubled size.. strange..
it's like i didn't lose anything, there's no bad side to raid 0 , just benefits.
post #4 of 5
Quote:
Originally Posted by asasdin View Post

i thought that in raid 0 the speed will be double but the size stays like i have only one drive,
but i see one drive with a doubled size.. strange..
it's like i didn't lose anything, there's no bad side to raid 0 , just benefits.

Look at it this way:




With a RAID 0 array, one half of the data being written goes to each drive, but both halves go at the same time
Reads work the same way, half the data from each drive at the same time.

So, the data flows at twice the speed of a single drive (Two reads or two writes happen at the same time). Unfortunately, there's a lot of stuff that has to happen to make that work, so it really isn't twice as fast. Maybe 50-70% faster.

As for size, Windows sees both drives as a single array that is the size of the combined drives.

The downside? If one drive fails, all your data goes to bit heaven. And that makes doing backups all the more important!
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
MouseAudio
Logiteck G400s none 
  hide details  
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My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
MouseAudio
Logiteck G400s none 
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post #5 of 5
Thread Starter 
ok thank you very mutch
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