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Data Storage Software Intel Linux

Optimizing Linux Systems For Solid State Disks 207

Posted by Soulskill
from the bit-by-bit dept.
tytso writes "I've recently started exploring ways of configuring Solid State Disks (SSDs) so they work most efficiently in Linux. In particular, Intel's new 80GB X25-M, which has fallen down to a street price of around $400 and thus within my toy budget. It turns out that the Linux Storage Stack isn't set up well to align partitions and filesystems for use with SSD's, RAID systems, and 4k sector disks. There are also some interesting configuration and tuning that we need to do to avoid potential fragmentation problems with the current generation of Intel SSDs. I've figured out ways of addressing some of these issues, but it's clear that more work is needed to make this easy for mere mortals to efficiently use next generation storage devices with Linux."
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Optimizing Linux Systems For Solid State Disks

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  • by Anonymous Coward on Saturday February 21, 2009 @10:29AM (#26940931)

    Your government is working towards it.

  • by Anonymous Coward on Saturday February 21, 2009 @11:06AM (#26941177)

    > Vista has already started working around this problem, since it uses a default partitioning geometry of 240 heads and 63 sectors/track. This results in a cylinder boundary which is divisible by 8, and so the partitions (with the exception of the first, which is still misaligned unless you play some additional tricks) are 4k aligned. So this is one place where Vista is ahead of Linuxâ¦.

    Although the technology it is used in is repugnant, NTFS has always been the One True Filesystem. It descended from DIGITAL's ODS2 (On Disk Structure 2) which traces back to the original Five Models (PDP 1, 8, 10, 11 and 12). You see, ODS was written by passionate people with degrees and rich personal lives in Massachusetts who sang and danced before the fall of humanity to the indignant Gates series who assimilated their young wherever possible and worked them into early graves during his epic battle with the Steves before the UNIX enemy remerged after a 25 year sleep and nuked the United States, draining all of its technological secrets to the other side of the world. Gates, realizing what he's done, now travels the universe seeking to rebuild his legacy by purifying humanity while the Steve series attempts to rebuild itself. Some of the original Five are still around, left to logon to Slashdot and witness what's left of the shadow of humanity still in the game as they struggle blindly around in epic circles indulging new and different ways to steal music, art and technology to make up for their lack of creativity long ago bred out of them by the Gates series.

  • by larry bagina (561269) on Saturday February 21, 2009 @11:16AM (#26941241) Journal
    No worries. Once Barack Obama(1) pays for your house and car, he'll pay off your credit card bills.
    1. future generations of Americans
  • by DJRumpy (1345787) on Saturday February 21, 2009 @12:04PM (#26941639)
    I'm just sitting here thinking. Doesn't an SSD have a preset number of writes in it due to it's nature?

    Does it really matter if they spread these writes around on the hard drive when the number of writes the drive is capable of doing is still the same in the end?

    To drastically oversimplify, lets say that each block can be written to twice. Does it really matter if they used up the first blocks on the drive and just spread towards the end of the drive partition with general usage rather than jumping all over to try to spread the writes around?

    Am I thinking about this the wrong way? What benefit does it give them to spread the writes around if the total number of writes doesn't change? Doesn't it just further fragment the files with little gain?
  • by Anonymous Coward on Saturday February 21, 2009 @01:32PM (#26942283)

    Sure. There are *lots* of considerations beyond speed to want SSDs

    And SSD drives are also shock-resistant.

    The drives will be shocked when they see what I have in my pr0n collection.

  • by MooUK (905450) on Saturday February 21, 2009 @06:01PM (#26944473)

    Surely, if you can't hear over 9kHz, that makes you the insensitive one?

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