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Linux and SSD

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Posted

hey guys

I am getting an SSD in the next few weeks

now i know about no defrag etc but have some questions

after installing linux on it should i be setting anything else up on it to save writing all the time?

also i will have a normal drive in there too so was going to put

/home
/var

on the spinning drive is this ok to do?? should anything else go on the normal drive

and will this give me any problems?

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Posted

I really wouldn't worry too much, they are not a fragile device that could die at any given moment.

On mine I have efi / boot / root on the SSD and /home to an SSD card. I don't run a swap partition.

Bare in mind that you will have to wait for the second drive on reads/writes/spinup.

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Posted

by the time you've used up the write cycles on your ssd you will have bought a new disk anyway. Don't worry about it

Edit: but always buy SLC and not MLC ;)

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Posted

getting a Vertex 4 :)

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Posted

[quote name='Aergan' timestamp='1358335233' post='595457512']
I really wouldn't worry too much, they are not a fragile device that could die at any given moment.

On mine I have efi / boot / root on the SSD and /home to an SSD card. I don't run a swap partition.

Bare in mind that you will have to wait for the second drive on reads/writes/spinup.
[/quote]


so would you just have it all on the SSD, then say if i am downloading Distro just move them from home onto the 2nd drive for storage?

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Posted

I know I've posted this on Neowin somewhere before, but I can't seem to find it. I would recommend reading the [url="https://wiki.archlinux.org/index.php/Solid_State_Drives"]Arch Wiki's article on Sold State Drives[/url]. Even if you're not running Arch, its an excellent resource. Here is my fstab, for reference:

[CODE]
proc /proc proc nodev,noexec,nosuid 0 0
UUID=7fd0430c-f487-4e11-847d-72face9a3cf0 / ext4 errors=remount-ro,noatime,discard 0 1
UUID=1ba9f35b-a7c0-4e57-8ef8-7e7e3823f079 /boot ext4 defaults,noatime,discard 0 2
UUID=695f1604-6590-45cd-99a2-4d6638a01c6b /home ext4 defaults,noatime,discard 0 2
UUID=b0f33380-a805-4192-ae7b-8c8515a42497 none swap sw 0 0
[/CODE]

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Posted

i seen aswell some recommend nodiratime

u dont have that

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Posted

I could be wrong (and probobly am), but maybe someone could confirm if this would work on his Fedora rig? I don't see anything that ties it specificlly to Ubuntu so it should work.

[url="http://www.webupd8.org/2013/01/enable-trim-on-ssd-solid-state-drives.html"]http://www.webupd8.o...ate-drives.html[/url]

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Posted

[quote name='Haggis' timestamp='1358354376' post='595458002']
i seen aswell some recommend nodiratime

u dont have that
[/quote]

I didn't know that mount option existed before, but, honestly, [i]noatime[/i] isn't really the most important switch for SSDs: [i]discard[/i] is. [i]noatime[/i] is merely a speed optimization to prevent file access times from being written to disk. ([i]nodiratime[/i] does the same thing as [i]noatime[/i], but for directories instead of files.) You can use it on rotational hard disks as well (which, in fact, I do) to gain a slight advantage in that regard. [i]discard[/i] is very important because it enables TRIM support, which will extend the life of your SSD by exploiting some of its technical characteristics.

[b]Edit:[/b] I just read up on it and added [i]nodiratime[/i] to my fstab. Thanks for the tip!

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Posted

[quote name='Haggis' timestamp='1358338778' post='595457584']
so would you just have it all on the SSD, then say if i am downloading Distro just move them from home onto the 2nd drive for storage?
[/quote]

Yeah pretty much. If you GPT/UEFI it, you can pretty much have as many partitions as you wish. Currently I have it split with Windows 8 Pro x64:

100MB Linux EFI Partition
12884MB EXT4 Partition for Ubuntu 12.10 x64 as /
100MB EFI partition for Windows Boot Loader
350MB NTFS System partition
*MB for Windows 8 OS

I also have an 8GB SDHC card for /home, 16GB SDHC card (Fat32) to shift stuff around from OS to OS and 2x500GB HDD's for Windows storage and games.

I might add fedora 18 onto the end depending on how I find it on a live test.

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Posted

While it is fine to have your home and var partitions on a separate physical disk, don't just dd your current home partition - or really any partition - from your hard drive to your SSD; you will likely end up with alignment issues that will adversely affect performance and life expectancy. Format a partition on the new disk and use [i]cp -a[/i] as root to copy everything from the old partition to the new one without losing file permissions and other extended attributes. (You can also use [i]rsync -a --progress[/i] if you would like to see what is being copied instead of having no output.)
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Posted

think i will prob just allow fedora to do its own partitions and use the 2nd drive for 2nd os testing and for sotrage

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Posted

ok so looking online i have found this info so far

remove [i]relatime[/i] and add in [i]discard, noatime, nodiratime[/i]

update grub file to use [i]deadline[/i] as a scheduler


Worked out i dont really want to put any partition on the HDD such as var etc as if it fails or i remove it the whole system goes lol

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Posted

Ok set Deadline as the scheduler


and does this look good to you guys?

[CODE]
guys does this look good to you
Code:
UUID=e5b30aa2-a4b6-41a3-9e0a-6688252d36ee / ext4 defaults,discard,noatime,nodiratime 1 1
UUID=8351a5aa-4bfd-4c45-872c-2ae6dc431e37 /boot ext4 defaults,discard,noatime,nodiratime 1 2
UUID=5757507b-3c10-4495-89f9-a2b1eeaccaea /home ext4 defaults,discard,noatime,nodiratime 1 2
UUID=1794135c-6075-4f17-b3bb-2b6635fd6380 swap swap defaults,discard,noatime,nodiratime 0 0
none /tmp tmpfs defaults 0 0
[/CODE]

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Posted

Haggis, your [i]fstab[/i] looks more-or-less like mine (since I added [i]nodiratime[/i], anyway). It looks like you did everything right, including the scheduler.

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Posted

Awesome

can relax now lol

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Posted

Hey Guys

I know about Smartctl for checking status of drive etc

do any of you guys use anything else to check the health of your SSD?

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