Re: Poor raid 1 performance?

"Mark" <pleasenospam@xxxxxxxxxx> wrote in message
news:uxxjf.8197$ea6.3967@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Hi there,
>
> I am planning on building a new computer system. Given the current cheap
> price and massive capacity of hard drives, I am thinking of using a raid
> array.
>
> To me, raid 1 seems the ideal solution. Raid 1 greatly improves data
> security, which is very important to me (and why I would never go with
> raid 0). Theoretically, the performance of raid 1 should also be what I
> want. Reads can be split across the two drives, leading to greater read
> performance, while write performance might be slower. Given the way I use
> the computer, read performance will help when it boots up, loads
> applications, loads games, etc. On the other hand, the poorer write
> performance will be less of an issue as much less is written to the disk
> during typical use, and I tend to just leave the computer when installing
> new programs (when large amounts of information does need to be written to
> the disk).
>
> Despite raid 1 seeming to be ideal, the read performance on current
> motherboard raid chipsets shows little to no improvement compared to that
> of a single drive:
>
> http://techreport.com/reviews/2004q2/chipset-raid/index.x?pg=1
>
> Is it possible to get improved read performance using raid 1??

No! Raid 1 exists solely for data preservation ...you may be thinking of
RAID 1+0 which will give you redundancy plus a performance gain without
requiring a RAID 5 capable controller but as far as RAID 1 is concerned you
are mistaken in your belief that it will or should boost performance.

btb


.

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