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Thread: Performance degradation, refresh tool?




  1. #11
    Join Date
    Dec 2009
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    Singapore
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    Default Re: Performance degradation, refresh tool?

    Thanks Psycho and MattEee for sharing. The Runcore Pro IV is using Indilinx and the firmware version is 1819 which supports TRIM. However, TRIM only works in the Windows environment. I am not sure if the OS independent Garbage Collection or some form is supported in 1819 though...

    For Mac Air users like myself, so far only Runcore has a compatible SATA II LIF interface version for our 1.8" hdd replacement. It's performance is awesome as you can see my results here tested with Xbench:

    My original 120GB stock HDD:-

    Disk Test 28.78

    Sequential 48.28
    Uncached Write 51.97 31.91 MB/sec [4K blocks]
    Uncached Write 46.29 26.19 MB/sec [256K blocks]
    Uncached Read 42.85 12.54 MB/sec [4K blocks]
    Uncached Read 53.54 26.91 MB/sec [256K blocks]

    Random 20.50
    Uncached Write 7.05 0.75 MB/sec [4K blocks]
    Uncached Write 54.46 17.44 MB/sec [256K blocks]
    Uncached Read 48.98 0.35 MB/sec [4K blocks]
    Uncached Read 69.22 12.84 MB/sec [256K blocks]


    My new Runcore 128GB SSD:-

    Disk Test 195.10

    Sequential 160.04
    Uncached Write 198.32 121.77 MB/sec [4K blocks]
    Uncached Write 229.99 130.13 MB/sec [256K blocks]
    Uncached Read 77.11 22.57 MB/sec [4K blocks]
    Uncached Read 379.47 190.72 MB/sec [256K blocks]

    Random 249.83
    Uncached Write 85.33 9.03 MB/sec [4K blocks]
    Uncached Write 400.60 128.25 MB/sec [256K blocks]
    Uncached Read 2190.10 15.52 MB/sec [4K blocks]
    Uncached Read 746.62 138.54 MB/sec [256K blocks]

    From the results, even if write performance has degraded and bottoms by 30%, it's still far better than the original 4200 rpm hdd. Read performance won't be degraded.

    According to Runcore, the next release 1840 or something is not mature yet. They're working on the firmware upgrade utility regardless. Those that do not have 1819, can contact them at support@runcore.com to get the firmware + util to flash the sdd. But I agree that their response time to customer queries is poor and inconsistent at this point, hopefully they can increase resources to improve their service. At their current service level, I won't get a Runcore for my 2.5" drives as yet, 'cause there are many more alternatives like the OCZ Vertex and X25-M.

    Diskeeper doesn't seem to support Mac, and their performance if any don't seem to be celebrated by OCZ users and Tomshardware. I don't even understand the logic behind defragging free cells for SSD... as far as I know, SSD do not need to be defragmented be it free space or not 'cause they don't have conventional spin disks with varying distances from the centre.
    Last edited by UltraTux; 12-15-2009 at 04:23 AM.
    Macbook Air 2,1 (Rev B) 1.6 GHz, 2 GB RAM, Runcore PRO IV 128 GB SSD; iPhone 3GS, 32 GB

  2. #12
    Join Date
    Apr 2009
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    NY
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    160

    Default Re: Performance degradation, refresh tool?

    Guys I was going to get the wiper tool up on the site but there is an issue with it that we are trying to work out. I will update you all on it tomorrow.

    Matt

  3. #13
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    Default Re: Performance degradation, refresh tool?

    Quote Originally Posted by UltraTux View Post
    I don't even understand the logic behind defragging free cells for SSD... as far as I know, SSD do not need to be defragmented be it free space or not 'cause they don't have conventional spin disks with varying distances from the centre.
    Tony Trim tells us:

    AS-Clean writes logical 1's across all free blocks on the drive, writing 1's actually erases the blocks so this is much like a TRIM.

    So to recap, you have now consolidated free space and reset the remaining blocks with no or invalid data to an erased state.

    I have tested this on Gen1 drives as well as Gen2 and both returned speed gains.

    I suggest you run this once or twice a week, it has to be executed in the order I outlined here, you have to consolidate the blocks before you reset them.
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  4. #14
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    Default Re: Performance degradation, refresh tool?

    Quote Originally Posted by Runcore Marketing View Post
    Guys I was going to get the wiper tool up on the site but there is an issue with it that we are trying to work out. I will update you all on it tomorrow.

    Matt
    Hi Matt, hope Runcore support is not forgetting about Mac users as well, albeit we're a smaller group :)
    Macbook Air 2,1 (Rev B) 1.6 GHz, 2 GB RAM, Runcore PRO IV 128 GB SSD; iPhone 3GS, 32 GB

  5. #15
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    Default Re: Performance degradation, refresh tool?

    Quote Originally Posted by nando4 View Post
    Tony Trim tells us:
    "as clean"? That's the silliest name ever. Can't even google it. Does it work on Snow Leopard? U have the link?
    Macbook Air 2,1 (Rev B) 1.6 GHz, 2 GB RAM, Runcore PRO IV 128 GB SSD; iPhone 3GS, 32 GB

  6. #16
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    Default Re: Performance degradation, refresh tool?

    Quote Originally Posted by UltraTux View Post
    "as clean"? That's the silliest name ever. Can't even google it. Does it work on Snow Leopard? U have the link?
    "As cleaner" was written and submitted by an OCZ Forum member. All it does is write FF to the remaing space on the SSD *after* the data has been consolidated to the front of the SSD using PerfectDisk (a defragmenter).

    There would surely be some tool for Snow Leopard that can allow you to create a file with "FF" hex data to fill the free space on your SSD, then delete the file upon it's completion?
    DIY ViDock O/C HP dualIDA | PLL pinmod | grub2 loader Storage 1.8" ZIF SSDs: ProIV, Photofast V4 | ODD caddy SSD/HDD | e-sata/usb

    Now: 12" HP 2510P U7600@1.6 2GB 64GB ProIV SSD + 500GB.caddy + GTX470/3dmark.vant=P5561 | Win7/64 XP.sp3 Ubuntu9.10
    Now: 14" Compaq CQ41 i5-430M 2.26 4GB 500GB + GTX470@x2/3dmark.vant=P10481 | Win7/64
    Next(Q1.2011): Sandy Bridge + pci-e 3.0 + GTX470-OC/3dmark06=22k

  7. #17
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    Default Re: Performance degradation, refresh tool?

    To add to what nando said about defrag and consolidation, for me the main reason to consolidate free space is the following:

    As we know, writing to clean flash is fastest and writing to dirty flash is termed as perf. degradation. When restoring performance with wiper, if you consolidate before then you will be able to have the max number of flash blocks that is physically possible cleaned. This is because the drive must erase in 512KB blocks at a time. Regardless of if there is 512KB of user data in the block or something like 1KB (any number less than the full capacity) for random writes in most cases this "slack" effect will happen where the next file will be written to another block.

    When consolidating, the program will group together a file or files so that as many blocks as possible are completely used, meaning more blocks are free. To simplify this example, lets pretend that 1GB is 1000MB just for a sec. You can have a Gigabyte of datastored in for example 5500 blocks. After consolidation, this will become much closer to the ideal of 2000 blocks (2 blocks per MB, times 1000 = 2000) after doing this you now have an extra 3500 blocks that can be cleaned up by wiper.exe or AS-Cleaner, meaning that your drive will go for longer before perf. degradation kicks in again.

    Tony Trim is to be used bearing in mind that it does take up a couple of write cycles to do, meaning it minutely impacts on drive life. Also, some users have noted a decrease in performance using it on an Indilinx drive. It's also IMO not recommended on some other SSD's with different controllers. Cases of its use on Samsung drives has been posative but I've used it on my X25-M with the oposite effect to the one desired. With my X25-M there's a typical pattern to benches when it's got no clean flash left. Random 4K Write clearly drops by a fixed amount each time. I tested the Tony Trim method first on a degraded drive and it did nothing to improve performance. I then cleaned it with HDDErase, re-imaged and verified it was back to peak performance then did a Tony TRIM and it degraded the drive as per the typical speed decrease I mentioned.

    AS-Cleaner is a useful tool in certain situations. Also Diskeepers "HyperFast" (for SSD's) is very effective. It also works on my X25, restoring 4K random Write to ~90% of fresh instead of the degraded 80% of fresh (X25's don't really loose much performance TBH, they're amazing in that respect).

    As for the wiper program, I may be missing something but as far as I can tell it will work with any Indilinx drive. There shouldn't really be any issues. If the issues you encountered were slow performance in AHCI and RAID mode then this is a common occurance and has never been fixed by Indilinx. A full wipe in IDE mode takes around 60-90 seconds where as in AHCI it takes (for me) about a hour. That's why I've gone back to Legacy IDE, even though AHCI gives my other SSD (X25-M) a good near 8% boost in reads.


    ****EDIT****
    I'm sure it would be possible to create a program to write FF (logical 1's) to the SSD in OS-X however I'm fairly sure one does not currently exist. This is similar to the Windows situation, as after all, before AS-Cleaner was modified on OCZ's Tony's request to handle "FF" writing, a tool wasn't available for Windows either. Maybe there will be someone reading this with OS-X skills sufficient to create such a program, that'd be cool.
    Last edited by Psycho101; 12-15-2009 at 06:35 AM.
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