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Raid 0

1x WD 250GB SATA / 1x WD 1TB black SATA

or

1x Plextor M5-PRO 128SSD / 1x WD 1TB black SATA

Q1: is RAID 0 setting should use a the same HDD or can I just use different kind of HDD?

Q2: should raid 0 be set first before installing the OS?

Q3: if a SSD and a 1TB HDD set as raid 0, is the R/W speed run as SSD speed?

Q4: how if used a two the same SSD and set it to raid 0, is the speed runs almost double?
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  1. Best answer
    chanwei21 said:
    Q1: is RAID 0 setting should use a the same HDD or can I just use different kind of HDD?


    A RAID array can have any types of drives; but you will get the best performance if the drives are identical.

    Quote:
    Q2: should raid 0 be set first before installing the OS?


    Yes, your array has to be created before you can install an O/S on it.

    Quote:
    Q3: if a SSD and a 1TB HDD set as raid 0, is the R/W speed run as SSD speed?


    No. A RAID-0 array's Read/Write performance is based upon the drive in the array with the slowest Read/Write speeds; so if you mix an SSD and a HDD in the same array you are not using the SSD for the reason you bought it -- speed.

    Also a RAID-0's total capacity is based upon the drive in the array with the smallest capacity.
    So if you RAID-0 a 128GB drive and a 1TB drive your array's total capacity (before formatting) would be 256GB.

    Quote:
    Q4: how if used a two the same SSD and set it to raid 0, is the speed runs almost double?


    Your benchmark results will be close to double. In real-world use you probably won't notice the difference between 2 SSD's in RAID-0 and just using them as separate drives.

    The exception where I would recommend SSDs in RAID-0 is if the drive sizes are small.
    I would recommend 2 64GB SSDs in RAID-0.
  2. thanks for the info :D
  3. Best answer selected by chanwei21.
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