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The strip, cluster, RAID testing for HDD's

post #1 of 4
Thread Starter 
A run down of all strips, clusters and RAID 0,1 & 5 on how they perform in different setups, you are to note that test drives used may perform differently to other drives on strips, clusters and RAID used so draw your own conclusions about these results.

The setup and settings used were.

I7 860
Gigabyte GA-P55-UD4
P55 (PCH) RAID controller
4GB (2x2GB) Corsair XMS3 DDR3 1600MHz XMP
3 x 320GB Seagate 7200.10 ST3320620AS
OS Windows 7 Pro

SATA mode to RAID allowing AHCI
RST 10.1.0.1008
Write-back cache enabled
Windows write-cache buffer flushing off
Write caching enabled
GPT for the partition
No initializing was done for RAID 1 & 5 but one test showed after initializing were no different.
Tests with a cluster size bigger then the strip size were not done.

Highlighted in red is Intel defaults and green is MS 4K cluster default.

Screenshots have the same file name but are all different and show CrystalDiskMark and ATTO run after one has finished to run the other.

One HDD vs all clusters
As you can see hardly no change was seen to the performance from 512 bytes – 64KB.
Clusters
512 bytes
1KB
2KB
4KB
8KB
16KB
32KB
64KB

RAID 0 (two disks) for Intel & Windows

Windows @4K cluster does well in writes with Sequential read being a bit low and with low transfer sizes do not see a improvement with this RAID.

Intel is overall better @128KB strip & 4K cluster with high Sequential read & write and improved low transfer sizes but the 512KB Random Write seems better with a cluster size bigger then 4K with 8K showing a better result for that test.

Windows (no strip size to set)
Clusters
512 bytes
1KB
2KB
4KB
8KB
16KB
32KB
64KB

Intel
4 KB (strip size used)

Clusters
512 bytes
1KB
2KB
4KB

Intel
8 KB (strip size used)

Clusters
512 bytes
1KB
2KB
4KB
8KB

Intel
16 KB (strip size used)

Clusters
512 bytes
1KB
2KB
4KB
8KB
16KB

Intel
32 KB (strip size used)

Clusters
512 bytes
1KB
2KB
4KB
8KB
16KB
32KB

Intel
64 KB (strip size used)

Clusters
512 bytes
1KB
2KB
4KB
8KB
16KB
32KB
64KB

Intel
128 KB (strip size used)

Clusters
512 bytes
1KB
2KB
4KB
8KB
16KB
32KB
64KB

RAID 1 for Intel & Windows

Windows @4K cluster looks much like the one HDD test but with better 4K QD32 no improvements with transfer sizes.

Intel shows some odd results it would look like you get less Sequential read & write then one HDD? However low transfer sizes are improved but using a 4K cluster or lower this drops off at 8-16KB? But with an 8KB cluster or higher seems better so I suggest anyone using Intel for RAID 1 may like to backup and format with a 8KB cluster but thats up to you.

Windows (no strip size to set)
Clusters
512 bytes
1KB
2KB
4KB
8KB
16KB
32KB
64KB

Intel (no strip size to set)
Clusters
512 bytes
1KB
2KB
4KB
8KB
16KB
32KB
64KB

RAID 5

I don't want to say...ok I say a bit but keep in mind that this is for a three disk RAID 5.

Its interesting to see that a 32KB strip did not as bad as one might think...but 64K & 128KB were better …128K seems best for a three disk RAID 5 setup but I'm thinking a smaller strip for more disks in RAID 5 may be better...no proof here to show that just a thought.

With 32-64KB strip 8-64KB (64KB cluster not done on 32KB strip) clusters the 512KB Random Write seems better from 15-18MB/s but with 128KB strip using clusters higher then 4KB being around 11-13MB/s.

Intel
16 KB (strip size used)

Clusters
512 bytes
1KB
2KB
4KB
8KB
16KB

Intel
32 KB (strip size used)

Clusters
512 bytes
1KB
2KB
4KB
8KB
16KB
32KB

Intel
64 KB (strip size used)

Clusters
512 bytes
1KB
2KB
4KB
8KB
16KB
32KB
64KB

Intel
128 KB (strip size used)

Clusters
512 bytes
1KB
2KB
4KB
8KB
16KB
32KB
64KB

wheee.gif
Edited by PeterUK - 12/23/10 at 10:34am
RAID 5 extreme!
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 860 Gigabyte GA-P55-UD4 Gainward GTX 295 V2 1792MB 8GB (4x2GB) Corsair XMS3 DDR3 1600MHz XMP 
Hard DriveOSPowerCase
3x 80GB Intel SSD M25-M G2---3x 320GB Seagate 7200 Windows 7 professional 64-bit Thermaltake Toughpower 650W Cooler Master WaveMaster 
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RAID 5 extreme!
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 860 Gigabyte GA-P55-UD4 Gainward GTX 295 V2 1792MB 8GB (4x2GB) Corsair XMS3 DDR3 1600MHz XMP 
Hard DriveOSPowerCase
3x 80GB Intel SSD M25-M G2---3x 320GB Seagate 7200 Windows 7 professional 64-bit Thermaltake Toughpower 650W Cooler Master WaveMaster 
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post #2 of 4
very interesting...thanks a lot for taking the time to do that
post #3 of 4
I haven't had chance to look through any of the pics yet, but thanks for taking the time to do all that benching and post them here.

Would it be possible to chart the results though? A plot of min-average-max transfer speeds for each scenario and another for access times would make the results much more accessible and useful.
post #4 of 4
Thread Starter 
Quote:
Originally Posted by the_beast;11760086 
Would it be possible to chart the results though? A plot of min-average-max transfer speeds for each scenario and another for access times would make the results much more accessible and useful.

I'm sure someone could do that...but not me...way too many numbers to look at and type them in to a chart:D and access times were not tested.
RAID 5 extreme!
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 860 Gigabyte GA-P55-UD4 Gainward GTX 295 V2 1792MB 8GB (4x2GB) Corsair XMS3 DDR3 1600MHz XMP 
Hard DriveOSPowerCase
3x 80GB Intel SSD M25-M G2---3x 320GB Seagate 7200 Windows 7 professional 64-bit Thermaltake Toughpower 650W Cooler Master WaveMaster 
  hide details  
Reply
RAID 5 extreme!
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 860 Gigabyte GA-P55-UD4 Gainward GTX 295 V2 1792MB 8GB (4x2GB) Corsair XMS3 DDR3 1600MHz XMP 
Hard DriveOSPowerCase
3x 80GB Intel SSD M25-M G2---3x 320GB Seagate 7200 Windows 7 professional 64-bit Thermaltake Toughpower 650W Cooler Master WaveMaster 
  hide details  
Reply
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