Which hard disk should i buy for RAID 0 ??
- Thread starter tarunagg
- Start date
geofelt
Titan
- Oct 9, 2006
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What would be your purpose in going to raid-0?
Raid-0 has been over hyped as a performance enhancer.
Sequential benchmarks do look wonderful, but the real world does not seem to deliver the indicated performance benefits for most
desktop users. The reason is, that sequential benchmarks are coded for maximum overlapped I/O rates.
It depends on reading a stripe of data simultaneously from each raid-0 member, and that is rarely what we do.
The OS does mostly small random reads and writes, so raid-0 is of little use there.
In fact, if your block of data were to be spanned on two drives, random times would be greater.
There are some apps that will benefit. They are characterized by reading large files in a sequential overlapped manner.
Here is a older study using ssd devices in raid-0.
http://www.tomshardware.com/reviews/ssd-raid-benchmark,3485.html
Spoiler... no benefit at all.
If you are looking for performance buy a SSD. It will be some 40x faster in random I/o and4-8x faster in sequential I/O than the fastest 10k hard drives.
Raid-0 has been over hyped as a performance enhancer.
Sequential benchmarks do look wonderful, but the real world does not seem to deliver the indicated performance benefits for most
desktop users. The reason is, that sequential benchmarks are coded for maximum overlapped I/O rates.
It depends on reading a stripe of data simultaneously from each raid-0 member, and that is rarely what we do.
The OS does mostly small random reads and writes, so raid-0 is of little use there.
In fact, if your block of data were to be spanned on two drives, random times would be greater.
There are some apps that will benefit. They are characterized by reading large files in a sequential overlapped manner.
Here is a older study using ssd devices in raid-0.
http://www.tomshardware.com/reviews/ssd-raid-benchmark,3485.html
Spoiler... no benefit at all.
If you are looking for performance buy a SSD. It will be some 40x faster in random I/o and4-8x faster in sequential I/O than the fastest 10k hard drives.
geofelt
Titan
- Oct 9, 2006
- 54,249
- 4,124
- 174,240
You are spoiled by the performance of the 970 evo.
Hard drive performance is primarily determined by the mechanical characteristics of the drive.
That does not change with raid0.
It takes a cleverly written app to get the performance that the synthetic raid-0 benchmarks show.
The app must be able to do anticipatory read ahead operations along with a good buffering technique to allow processing while reading ahead.
Some of the WD blue drives were 5400 rpm drives, some 7200 rpm.. If yours was one of the former, 7200 rpm might help.
Here is a nice article on the WD rainbow:
https://www.pugetsystems.com/labs/articles/Understanding-the-WD-Rainbow-674/
Hard drive performance is primarily determined by the mechanical characteristics of the drive.
That does not change with raid0.
It takes a cleverly written app to get the performance that the synthetic raid-0 benchmarks show.
The app must be able to do anticipatory read ahead operations along with a good buffering technique to allow processing while reading ahead.
Some of the WD blue drives were 5400 rpm drives, some 7200 rpm.. If yours was one of the former, 7200 rpm might help.
Here is a nice article on the WD rainbow:
https://www.pugetsystems.com/labs/articles/Understanding-the-WD-Rainbow-674/
Drive speeds typically only affect load speeds for games. What some people to is install whatever game(s) they're currently playing on their SSD, and then move them back to the HDD when done to free up space for new ones.
I don't know how often you're mounting those ISOs, but again if there's a few you use most often put just those on your SSD.
Movies usually run just fine on slower HDDs, are you having issues with playback?
Out of those 3 things, I don't think any would really benefit from RAID.
As said above, if you're getting a new HDD and are at all concerned about speed, getting a 7200 RPM rather than 5200 RPM is a pretty easy place to start.
I don't know how often you're mounting those ISOs, but again if there's a few you use most often put just those on your SSD.
Movies usually run just fine on slower HDDs, are you having issues with playback?
Out of those 3 things, I don't think any would really benefit from RAID.
As said above, if you're getting a new HDD and are at all concerned about speed, getting a 7200 RPM rather than 5200 RPM is a pretty easy place to start.
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