HDTach results inside from 2 80gb SATA II RAID 0

[99ls1z]

I can post a screen shot later but I ran the hdtach 3 different times and got an average burst speed of 350MB/Sec and average read spead of 100MB/Sec.

[Wet Fart]

99ls1z - yes I've also set up a couple of Hitachi 7K80 SATA II in Raid 0 array and am seeing very similar results.

http://i22.photobucket.com/albums/b321/Vegetarianator/Ultra-D%20water/HD_Tach_2.jpg

I am noticing downloads and loading times are quicker which I understand has a lot ot do withe the "read" speed but am feeling a bit confused by the advantage of having such fast "burst" speeds.

Can anyone enlighten me?

[Wet Fart]

bump :stick:

[99ls1z]

Those results are very similar to mine. I am impressed so far with them. What did you set your stripe size to? I set mine to 128k.

[Ugly n Grey]

Burst is just the time when the information requested is in the drives data cache ad can be passed back to the bus. Burst is no big deal until you have a HUGE honking data cache like on a SCSI RAID controller and don't have to run back to the drives and fetch data.

Sustained write and read speeds are really important when you work with larger files. Don't know if it is really all that big a deal for day to day computing but if it makes you happy do it! You won't go blind from raiding your drives either.

UnG

[Wet Fart]

Those results are very similar to mine. I am impressed so far with them. What did you set your stripe size to? I set mine to 128k.

64K stripe

I see that 4 of these in raid 0 are so quick -
http://www.fileshosts.com/DFI/NF4_SLI_D/results/FX57/G4Storm/Gskill/PC4400LE/2x512/799_800/5102_FIX/LDT5x/14x/200-200-2.5337-7-17-2223_1.36-1.3-1.6-2.84_3072_ds8dds1_7F5_hitachi/raid0/4x7K80/16k4k/hdtach_1_tn.jpg

average read = 193.6MB/s

BTW, not my results, this is taken from a thread by eva2000 -
http://i4memory.com/showthread.php?t=1026

[Wet Fart]

Burst is just the time when the information requested is in the drives data cache ad can be passed back to the bus. Burst is no big deal until you have a HUGE honking data cache like on a SCSI RAID controller and don't have to run back to the drives and fetch data.

Sustained write and read speeds are really important when you work with larger files. Don't know if it is really all that big a deal for day to day computing but if it makes you happy do it! You won't go blind from raiding your drives either.

UnG

Thanks UnG, I appreciate it.

It really is about access time for everyday usage, isn't it ?

I noticed this -

2 x 7K80 in Raid 0 :
- random access = 13.8 M/s
- average read = 98.7 MB/s

2 x 74GB Raptors in Raid 0 :
- random access = 7.9ms
- average read = 109.1MB/s

4 x 7K80 in Raid 0 :
- random access = 12.7ms
- average read = 193.6MB/s

So, with a 7.9ms access time the Raptors are still way faster, yes?

[Tex]

For stuff like where your OS is where the heads are having to move and read many differant or smaller files yes the access time is far more important then STR. When your copying from one disk or one array to another seperate disk or array on seperate drives or reading or writing large files where the heads can stay locked and the drives are all defragged so the heads do not have to move STR is more important

[tonyl]

did you bechmark your system, how many score increase?