750Gb SAMSUNG HD753LJ (F1 Spinpoint) faster with AAM *ON*

Discussion in 'iMac' started by unlokia, Aug 14, 2008.

  1. unlokia macrumors regular

    Joined:
    Jan 14, 2007
    #1
    I just installed a SAMSUNG HD753LJ 750Gb drive (32Mb cache - the F1 Spinpoint) in my 2008 24" iMac... but was surprised by these results. The drive *seems* faster with acoustic management set to QUIET, looking at the scores below (XBench), BUT it boots slower than when the AAM is set to PERFORMANCE... but when it's set to PERFORMANCE, the score drops BUT the boot time is SIGNIFICANTLY reduced... :confused:


    I use an Ubuntu CD to set AAM to level '128' (quietest)
    Code:
    Disk Test	77.53	
    		Sequential	113.01	
    			Uncached Write	194.19	119.23 MB/sec [4K blocks]
    			Uncached Write	184.82	104.57 MB/sec [256K blocks]
    			Uncached Read	52.01	15.22 MB/sec [4K blocks]
    			Uncached Read	178.29	89.61 MB/sec [256K blocks]
    		Random	59.01	
    			Uncached Write	20.37	2.16 MB/sec [4K blocks]
    			Uncached Write	261.11	83.59 MB/sec [256K blocks]
    			Uncached Read	105.47	0.75 MB/sec [4K blocks]
    			Uncached Read	185.54	34.43 MB/sec [256K blocks]
    
    
    I use an Ubuntu CD to set AAM to level '254' (loudest - "performance")
    Code:
    Disk Test	72.90	
    		Sequential	106.70	
    			Uncached Write	189.92	116.61 MB/sec [4K blocks]
    			Uncached Write	181.89	102.91 MB/sec [256K blocks]
    			Uncached Read	50.58	14.80 MB/sec [4K blocks]
    			Uncached Read	143.77	72.26 MB/sec [256K blocks]
    		Random	55.37	
    			Uncached Write	19.45	2.06 MB/sec [4K blocks]
    			Uncached Write	173.54	55.56 MB/sec [256K blocks]
    			Uncached Read	110.37	0.78 MB/sec [4K blocks]
    			Uncached Read	166.44	30.88 MB/sec [256K blocks]
    How so??
     
  2. Mindflux macrumors 68000

    Mindflux

    Joined:
    Oct 20, 2007
    Location:
    Austin
    #2
    I think something's not right. Download the HUTIL ISO from Samsung and set the AAM via that and re-test.
     
  3. unlokia thread starter macrumors regular

    Joined:
    Jan 14, 2007
    #3
    Did that - the HUTIL doesn't boot on my iMac - hangs. I have every confidence in this Ubuntu CD to perform such a simple operation, as setting hdparm parameters correctly!.
     
  4. Mindflux macrumors 68000

    Mindflux

    Joined:
    Oct 20, 2007
    Location:
    Austin
    #4
    Maybe Samsung's AAM is set differently?

    if you do hdparm -I /dev/sda | grep -i acoustic what does it give you?
     
  5. unlokia thread starter macrumors regular

    Joined:
    Jan 14, 2007
    #5
    It's set to 254 - PERFORMANCE - exactly as I set it, using:

    Code:
    sudo hdparm -M 254 /dev/sda
    
    Also - HUTIL is known to be unreliable AND buggy:
    http://forums.macrumors.com/showthread.php?t=430411
     
  6. Mindflux macrumors 68000

    Mindflux

    Joined:
    Oct 20, 2007
    Location:
    Austin
    #6

    That may be.. but you aren't setting it via a supported utility; so how do you expect to get help?
     
  7. unlokia thread starter macrumors regular

    Joined:
    Jan 14, 2007
    #7
    Okay that's fine - so how do you propose I set AAM, when the utility clearly doesn't work?.

    Supported by who - by NATIVE ATA command set?. It locks it into the drive, it's nothing AT ALL to do with the OS - I can prove this, because I used a Linux LIVECD to set it, and even after a power off and reboot (flushing ram - REMEMBER livecds are temp in RAM) the hdparm is STILL set to 254 how I chose, so it should be okay.

    What do you suggest? Can you point me to an OSX AAM utility? doubt it. :) thanks!

    Found this:
    http://hddguru.com/content/en/software/2005.10.02-MHDD/

    Now if that makes no difference, I give up! :)
     
  8. Mindflux macrumors 68000

    Mindflux

    Joined:
    Oct 20, 2007
    Location:
    Austin
    #8
    FWIW I booted hutil just fine. If I had a usb keyboard hooked up I could have gotten past this disclaimer. PS there are plenty of windows apps to set acoustic management if you have a bootcamp partition or vmware. Google SysTool if you wish.
     
  9. unlokia thread starter macrumors regular

    Joined:
    Jan 14, 2007
    #9
    No you couldn't - I tried both my Mac KB (Alu) AND a USB PC KB - no joy. Anyhow, thanks for the replies, but I'm not gonna worry about it any more - I left it on 254 and it FLIES!!.

    Thanks.
     

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