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Bruce

Hard Drive speed testing

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now i have to prepare for what lays ahead, my chip had partial contact to a heatsink for probably a month :lol:

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Bruce-Laptop:/home/bruce # hdparm -tT /dev/sdb

/dev/sdb:

Timing cached reads: 3538 MB in 2.00 seconds = 1771.09 MB/sec

Timing buffered disk reads: 250 MB in 3.01 seconds = 83.03 MB/sec

 

Love this laptop :lol:

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mine at 4ghz

 

/dev/sda:
 Timing cached reads:   26744 MB in  2.00 seconds = 13388.47 MB/sec
 Timing buffered disk reads:  320 MB in  3.00 seconds = 106.53 MB/sec

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Hard drive test.

 

/dev/sda:

Timing cached reads: 7846 MB in 2.00 seconds = 3925.95 MB/sec

Timing buffered disk reads: 307 MB in 3.01 seconds = 101.99 MB/sec

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Here's super pi.

 

[email protected]:~/super_pi> ./super_pi 20
 Version 2.0 of the super_pi for Linux OS
 Fortran source program was translated into C program with version 19981204 of
 f2c, then generated C source program was optimized manually.				 
 pgcc 3.2-3 with compile option of "-fast -tp px -Mbuiltin -Minline=size:1000 -Mnoframe -Mnobounds -Mcache_align -Mdalign -Mnoreentrant" was used for the	   
 compilation.																   
 ------ Started super_pi run : Mon Apr 13 23:43:38 EDT 2009					 
 Start of PI calculation up to 1048576 decimal digits						   
 End of initialization. Time=	   0.196 Sec.								  
 I= 1 L=	   0		Time=	   0.588 Sec.								  
 I= 2 L=	   0		Time=	   0.668 Sec.								  
 I= 3 L=	   1		Time=	   0.668 Sec.								  
 I= 4 L=	   2		Time=	   0.668 Sec.								  
 I= 5 L=	   5		Time=	   0.668 Sec.								  
 I= 6 L=	  10		Time=	   0.668 Sec.								  
 I= 7 L=	  21		Time=	   0.672 Sec.
 I= 8 L=	  43		Time=	   0.668 Sec.
 I= 9 L=	  87		Time=	   0.668 Sec.
 I=10 L=	 174		Time=	   0.668 Sec.
 I=11 L=	 349		Time=	   0.668 Sec.
 I=12 L=	 698		Time=	   0.668 Sec.
 I=13 L=	1396		Time=	   0.668 Sec.
 I=14 L=	2794		Time=	   0.668 Sec.
 I=15 L=	5588		Time=	   0.664 Sec.
 I=16 L=   11176		Time=	   0.660 Sec.
 I=17 L=   22353		Time=	   0.652 Sec.
 I=18 L=   44707		Time=	   0.632 Sec.
 I=19 L=   89415		Time=	   0.588 Sec.
 End of main loop
 End of calculation.	Time=	  13.185 Sec.
 End of data output.	Time=	   0.088 Sec.
 Total calculation(I/O) time=	  13.273(	   0.500) Sec.
 ------ Ended super_pi run : Mon Apr 13 23:43:52 EDT 2009
[email protected]:~/super_pi>

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Hard drive test.

 

/dev/sda:

Timing cached reads: 7846 MB in 2.00 seconds = 3925.95 MB/sec

Timing buffered disk reads: 307 MB in 3.01 seconds = 101.99 MB/sec

 

Did you do"hdparm -tT /dev/sda" to get those numbers? If so, you didn't check your fake raid speed, only the 1st hard disk's speed.

 

And, of course you can't do "hdparm -tT /dev/md0" because there is no /dev/md0; the difference being between "fake hardware raid" and Linux "software raid".

 

You should do something like "hdparm -tT /dev/mapper/nvidia_baaigffg".

 

My nvidia fake raid is long gone now but that's what I had to do to use hdparm on the raid.

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I was going to do that first but I did what looked similar to the others. Here's the new result.

 

[email protected]:~> su
Password:
Family:/home/mark # hdparm -tT /dev/mapper/nvidia_baaigffg

/dev/mapper/nvidia_baaigffg:
 Timing cached reads:   8826 MB in  2.00 seconds = 4417.14 MB/sec
 Timing buffered disk reads:  440 MB in  3.01 seconds = 146.16 MB/sec

Thanks John.

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Well, that may mean that nvidia "fake" hardware raid is not as good as Linux software raid. I would think you should have gotten closer to 200MB/sec.

 

I got just over 300MB/sec once when I tried 5 old seagate sata disks software raid0 each of which got just over 60MB/sec individually.

 

A project for a very long rainy day perhaps. :lol:

 

Edit: also of cource, the disk controller needs to be on a bus that supports speeds over 150MB/sec (the regular pci bus) like pcie or pci-x.

Edited by John 44

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I was wondering about the Linux software RAID, whether or not it was better. I'm going to have to try that next.

 

In Windows the Overdrive test consistently scores between 110 - 120 Mb/s in RAID and around 55 - 60 non-RAID.

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your already using linux software raid, if i'm not mistaken thats the only type of raid suse uses. software. ;)

 

:b33r:

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I'm pretty sure it's the onboard fake RAID. AFAIK you have to manually set up Linux Software RAID no?

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i assumed you had. :unsure:

 

can't remember exactly how i had my raid dual boot set up, but had 2x200gb drives with something like 100mb raid1 partition for boot, a 60gb windows raid 0(30gb each drive), 20gb root partition raid0(10gb each drive) and 200gb home partition raid0(100gb each drive) ;)

 

:b33r:

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your already using linux software raid, if i'm not mistaken thats the only type of raid suse uses. software. ;)

 

:b33r:

 

Negative! They are NOT the same things Terry. The so called "fake raid" is called fake because it is not true 100% hardware raid; meaning, the raid controller has its own cpu and memory and places little or no loads main cpu or memory.

 

Because Linux knows its not true hardware raid does not make it Linux software raid.

 

If you want to spend upwards of $500 you can buy a true hardware raid card that Linux supports then raid0 array would simply be sda, etc.

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:tup:

 

i thought when i set up my raid0 even tho i had the fake raid0 set up in bios(windows could see it after installing drivers) when it came time to install suse i still had to set up a linux software raid because suse only saw the 2 drives and not the fake raid but this is going back to 10.3.

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:tup:

 

i thought when i set up my raid0 even tho i had the fake raid0 set up in bios(windows could see it after installing drivers) when it came time to install suse i still had to set up a linux software raid because suse only saw the 2 drives and not the fake raid but this is going back to 10.3.

 

Or, suse didn't support your particular fake raid chipset. Or Duanester's rabbits ate your fake raid chip. :lol:

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here you go Bruce in answer to my drive speeds.

 

ssd is sda

both sdb and sdc are 1tb wd blacks.

 

partitions sdc2 and 3 are right on the end of the drive not the beginning, sdc2 is 10gb /tmp sdc3 is 2gb /swap.

 

mainpc:/home/terry # hdparm -tT /dev/sda1

/dev/sda1:
 Timing cached reads:   18224 MB in  2.00 seconds = 9125.35 MB/sec
 Timing buffered disk reads:  486 MB in  3.00 seconds = 161.95 MB/sec
mainpc:/home/terry # hdparm -tT /dev/sda2

/dev/sda2:
 Timing cached reads:   17980 MB in  2.00 seconds = 9001.99 MB/sec
 Timing buffered disk reads:  534 MB in  3.00 seconds = 178.00 MB/sec
mainpc:/home/terry # hdparm -tT /dev/sdb1

/dev/sdb1:
 Timing cached reads:   18038 MB in  2.00 seconds = 9031.71 MB/sec
 Timing buffered disk reads:  298 MB in  3.00 seconds =  99.19 MB/sec
mainpc:/home/terry # hdparm -tT /dev/sdc1

/dev/sdc1:
 Timing cached reads:   17628 MB in  2.00 seconds = 8824.66 MB/sec
 Timing buffered disk reads:  298 MB in  3.01 seconds =  99.13 MB/sec
mainpc:/home/terry # hdparm -tT /dev/sdc2

/dev/sdc2:
 Timing cached reads:   17796 MB in  2.00 seconds = 8909.98 MB/sec
 Timing buffered disk reads:  150 MB in  3.02 seconds =  49.75 MB/sec
mainpc:/home/terry # hdparm -tT /dev/sdc3

/dev/sdc3:
 Timing cached reads:   17222 MB in  2.00 seconds = 8622.66 MB/sec
 Timing buffered disk reads:  156 MB in  3.02 seconds =  51.60 MB/sec
mainpc:/home/terry #

my ssd was 230-240 or above i think when i first tested it.

 

:b33r:

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i see this topic has not been brought up in awhile, and i was curious as to how my drives were performing....so here goes:

 

sda is a 40gb intel SSD

sdb is a 500gb WD blue 16mb cache

sdc is a 1.5tb WD green 32mb cache

sdd is a 640gb WD black 32mb cache

 

sudo hdparm -t -T /dev/sda

 

/dev/sda:

Timing cached reads: 21450 MB in 2.00 seconds = 10736.63 MB/sec

Timing buffered disk reads: 562 MB in 3.01 seconds = 186.95 MB/sec

 

sudo hdparm -t -T /dev/sdb

 

/dev/sdb:

Timing cached reads: 21488 MB in 2.00 seconds = 10755.72 MB/sec

Timing buffered disk reads: 266 MB in 3.01 seconds = 88.28 MB/sec

 

sudo hdparm -t -T /dev/sdc

 

/dev/sdc:

Timing cached reads: 21304 MB in 2.00 seconds = 10663.82 MB/sec

Timing buffered disk reads: 300 MB in 3.01 seconds = 99.51 MB/sec

 

sudo hdparm -t -T /dev/sdd

 

/dev/sdd:

Timing cached reads: 21562 MB in 2.00 seconds = 10792.73 MB/sec

Timing buffered disk reads: 306 MB in 3.02 seconds = 101.41 MB/sec

 

 

i guess everything looks about right. :shrug:

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I guess this isn't to bad for a single 250Gig 5400rpm Seagate drive w/ Ubuntu installed via Wubi.

 

 

/dev/sda:

Timing cached reads: 962 MB in 2.00 seconds = 480.71 MB/sec

Timing buffered disk reads: 188 MB in 3.00 seconds = 62.59 MB/sec

Edited by Tx Redneck

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/dev/sda1:

Timing cached reads: 1706 MB in 2.00 seconds = 852.63 MB/sec

Timing buffered disk reads: 178 MB in 3.01 seconds = 59.19 MB/sec

 

320 GB 5400 RPM drive...would be faster if this partition was closer to the outside of the disk.

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this is my tablet pc i just got not that long ago

 

 

 

Timing cached reads: 2238 MB in 2.00 seconds = 1119.83 MB/sec

Timing buffered disk reads: 100 MB in 3.05 seconds = 32.82 MB/sec

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Just a single drive on my desktop machine

 

bruce-desktop:/home/bruce # hdparm -t -T /dev/sda

 

/dev/sda:

Timing cached reads: 6686 MB in 2.00 seconds = 3343.21 MB/sec

Timing buffered disk reads: 384 MB in 3.01 seconds = 127.72 MB/sec

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Just a single drive on my desktop machine

 

bruce-desktop:/home/bruce # hdparm -t -T /dev/sda

 

/dev/sda:

Timing cached reads: 6686 MB in 2.00 seconds = 3343.21 MB/sec

Timing buffered disk reads: 384 MB in 3.01 seconds = 127.72 MB/sec

 

Those Spinpoint F3's are gnarly!

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Yep I love these drives and have been using them in all my customers PC's

 

Just ran it on my swap partition instead of the root partition.

 

bruce-desktop:/home/bruce # hdparm -t -T /dev/sda2

 

/dev/sda2:

Timing cached reads: 6666 MB in 2.00 seconds = 3333.84 MB/sec

Timing buffered disk reads: 410 MB in 3.01 seconds = 136.28 MB/sec

Edited by Bruce

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