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-   -   How SSDs Really Work (http://www.aoaforums.com/forum/general-hardware-discussion/51097-how-ssds-really-work.html)

ThunderRd 24th February, 2013 08:02 AM

How SSDs Really Work
 
Really good read at ARS:

Solid-state revolution: in-depth on how SSDs really work | Ars Technica

Gives you an idea of the clever technology behind your shiny new SSD.

booman 25th February, 2013 05:25 PM

Is there a LOT of big technical words so I have to look them up in the IT dictionary? Or is it an easy read?

[edit] I'll answer my own questions... so far it an extremely easy read!!!

[edit again] I'm slowing getting distracted as I read CPU, registers, latency and techie terms, but I'll read on. Don't get me wrong... I am a techie person, but reading about it is difficult for me..

[edit again] I got distracted by the "Dwarf Fortress" review and started reading it, but that was rather bland and I got bored of it.

[edit ugh] Transistor Gates? now the history of processing.. I push on

[edit] ok, the beginning was an extremely easy read

booman 25th February, 2013 06:26 PM

Watched a nice video on how a transistor works: clicky

Daniel ~ 25th February, 2013 07:02 PM

It's the part where they have to erase an entire page to change a single punctuation mark...that gets me. AND THAT is still way faster than a mechanical drive!!

booman 25th February, 2013 07:15 PM

Ok, I give up, the article got better when it started talking about RAID and comparing an SSD drive to a flash drive...

booman 25th February, 2013 07:16 PM

Quote:

Originally Posted by Daniel ~ (Post 523228)
It's the part where they have to erase an entire page to change a single punctuation mark...that gets me. AND THAT is still way faster than a mechanical drive!!

So true, I wonder if... the time comes when the drive starts slowing down, can we format it with all zeros and start over fresh with the original speed?

Daniel ~ 25th February, 2013 07:21 PM

Interesting question Boo!

I don't know is my answer! ":O}

robbie 1st March, 2013 06:33 AM

Front page worthy?

Aedan 1st March, 2013 11:40 AM

Quote:

Originally Posted by booman (Post 523231)
So true, I wonder if... the time comes when the drive starts slowing down, can we format it with all zeros and start over fresh with the original speed?


If you have an OS that supports TRIM (and it's configured right!), then the OS can help to tell the SSD when blocks are no longer used. That means that deleting a file will erase the block(s), so they are fresh again. This means you don't lose performance from deleting a file, but you will with an overwrite (IE, when you update your CV or patch a file).

Really, to make the most of an SSD, the filesystem needs to be aware of how it's configured. As far as I'm aware on Linux, ext4, btrfs, JFS, and XFS all support TRIM if you're using a 3.7 kernel. For ext4, you would need to add the "discard" flag to your mounts in fstab.

booman 1st March, 2013 06:03 PM

Awesome Aedan, can you post a short step-by-step for Daniel?

Daniel ~ 1st March, 2013 08:33 PM

Yes Please! ":O}

booman 1st March, 2013 08:40 PM

A really really short one just for Dan;)

chrisbard 1st March, 2013 09:48 PM

01010101.01101101.10100100 / 666 :rolling:

Aedan 2nd March, 2013 10:13 AM

Quote:

Originally Posted by booman (Post 523318)
Awesome Aedan, can you post a short step-by-step for Daniel?

You want me to post a how to edit fstab? Getting that wrong will prevent Daniel's machine from booting! Might be easier for Daniel to post his /etc/fstab and then we edit it, and Daniel can copy it back.

Less prone to errors that way. ;)

ThunderRd 2nd March, 2013 12:48 PM

Quote:

Originally Posted by Aedan (Post 523335)
You want me to post a how to edit fstab? Getting that wrong will prevent Daniel's machine from booting! Might be easier for Daniel to post his /etc/fstab and then we edit it, and Daniel can copy it back.

Less prone to errors that way. ;)

You beat me to it :)

Also, if we see his fstab we know what filesystem he is using on the SSD.

chrisbard 2nd March, 2013 08:20 PM

show us your fstab!

robbie 3rd March, 2013 09:02 AM

Quote:

Originally Posted by chrisbard (Post 523337)
show us your fstab!

LOL do it NOW!!! :)

Daniel ~ 3rd March, 2013 10:17 PM

Thank you. Now if some one will tell me how to access the Fstab...Yes...I'm really that dumb.":O}

ThunderRd 4th March, 2013 02:59 AM

Dan, it's in /etc.

Go to /etc, open /etc/fstab in your file editor, copy it and paste it here, and we'll edit it for you.

booman 4th March, 2013 04:45 PM

yeah, we'll erase your whole hard drive for you... then give you a bunch of Terminal commands to re-build it from scratch


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