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Thread: Samsung SSD Install Now What?

  1. #1
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    Samsung SSD Install Now What?

    I just installed Xubuntu 12.10 on a sata 3 samsung ssd. I used default hard drive options. I have searched around & understand i need to disable journaling? Is this True? Also i have a 2nd mech. HD i need to change permissions on Is changemod 755 the right choice for this? Thanks
    Smuggly

  2. #2
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    Re: Samsung SSD Install Now What?

    Do SSD need customization?
    http://ubuntuforums.org/showthread.php?t=1981478
    https://wiki.archlinux.org/index.php/Solid_State_Drives
    http://ubuntuforums.org/showthread.php?t=2003022

    This was pretty much all I did:
    With SSD or Flash drives, Use ext2 or ext4 without journal:
    sudo tune2fs -O ^has_journal /dev/sda1
    sudo tune2fs -o discard /dev/sda1
    No swap or set swapiness or install 'Dynamic Swap Space Manager' from the Ubuntu Software Center
    After installing, change the fstab so that everything gets mounted with noatime.
    Make sure BIOS is in AHCI mode.
    change to noop i/o scheduler

    Do not just do chmod on other drive if not sure what you are doing. Is parition in Linux format. Ownership nor permissions are supported by Windows formats.

    Understanding fstab
    https://help.ubuntu.com/community/Fstab
    https://help.ubuntu.com/community/Mount/
    https://help.ubuntu.com/community/FilePermissions
    http://www.psychocats.net/ubuntu/mountlinux
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  3. #3
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    Re: Samsung SSD Install Now What?

    Yea 2nd drive i just formatted using gparted and ext 4 file system. Whats the noop scheduler? Thanks

  4. #4
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    Re: Samsung SSD Install Now What?

    There are several schedulers. The default is designed more for rotating drives. Not sure if they now have changed to cfg or not. Recommendation on noop was from a year or two ago.

    http://www.phoronix.com/scan.php?pag...hed_2012&num=1

    To see what you are using:

    fred@fred-Precise:~$ cat /sys/block/sda/queue/scheduler
    noop deadline [cfq]
    Last edited by oldfred; October 26th, 2012 at 08:56 PM.
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  5. #5
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    Re: Samsung SSD Install Now What?

    OK i will try when i get the config all set. i got the hdd (Mech. One) all permission set.

  6. #6
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    Re: Samsung SSD Install Now What?

    I ran sudo tune2fs -O ^has_journal /dev/sda1 and it returned a "bad magic number couldn't find superblock or something to that effect. also i added the discard,noatime option to fstab to sda. Is it possible journaling be left on? is not this one of the main reasons we want ext4 in the 1st. place? I've read alot of stuff on this the last 24 hrs. It seems the configurations aren't keeping up with the technology. (ssd getting better) I would like you're opinion on this oldfred & anyone else please. Thanks smuggly
    Last edited by smuggly; October 27th, 2012 at 01:16 PM.

  7. #7
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    Re: Samsung SSD Install Now What?

    The argument was you did not need a journal on a smaller partition and it reduces writes if you do not have one. Why boot partitions are usually ext2 historically even with rotating drives.
    With a journal, fsck is quicker and repair or recovery is more likely. Why we use ext4 for larger partitions.

    So with SSD and just a partition with system files journal does not add much and not having it reduces writes. But now they say the newer SSDs have lives not all that different than rotating drives so it does not matter.

    I have an OEM/house brand (low cost) SSD, and have it configured with boot files and only user settings from /home. All my data is on a rotating drive. So I do not think journal adds much and if not having it increases life a bit, I will run without journal.

    Or I do not really know.
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  8. #8
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    Re: Samsung SSD Install Now What?

    Thank You sir, For You're Help. Smuggly

    I thought i would add that after much serching and though . I went with just the trim enabled ande fstab otions dscard and noatime. Time will tell if i am right or not.
    I will post back if i have any problems with my samsung ssd.
    Last edited by smuggly; November 3rd, 2012 at 01:55 PM.

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