[olug] SSD & linux

[Jason N]

Depending on the drive, you can write the entire drive dozens of times a day for something like 3 years and you should be fine.  As someone else mentioned, a lot of drive have leveling algorithms, so assuming you're not writing the entire drive, you will have even better life expectancy.
 
---- "Sheldon wrote: 
MY main reason is to prolong SSD life. Well I guess if you don't mind you can use your SSD and write everything to it like spinning platter. However from my readings SSD's have a  limited shelf life. But maybe I am amiss here as this is my first SSD I have purchased. The companies charge a premium for SSD's so I want to protect my investment. The second being performance. Not a true measurement for anything really but I do have a seven second boot time :). 



Roger Sheldon
Storage Engineer
wk 402.777.7901
cell 402.889.2585


-----Original Message-----
From: olug-bounces at olug.org [mailto:olug-bounces at olug.org] On Behalf Of Obi-Wan
Sent: Monday, February 25, 2013 1:49 PM
To: olug at olug.org
Subject: Re: [olug] SSD & linux

On a more comprehensive note, what's the point of all this?  Just to minimize the number of writes to the SSD in order to prolong its life?
Is it really that big a deal?

I recently installed an SSD as my root disk on my desktop.  I didn't make any SSD-specific changes in the process.  Is that such a bad thing?
The additional speed is sure nice, to the point where I'm considering moving some of my heavily-accessed cache files from /home (a 3-spindle
stripe) to /tmp (the SSD).

> Looking to optimized Linux Mint14, AMD 1100t, 32G, Radeon 7870, OCZ Vertex 256, HDD's. I think I need to look at configuring the scheduler and something else... can't remember lol. Anyway am I backing myself in the corner with these configurations or missing something here? Appreciate your insights or thoughts.
> 
> 
> I turned off journaling, and set the FS to be checked at regular intervals.
> $ sudo mke2fs -t ext4 -O ^has_journal /dev/sda1 $ sudo tune2fs -o 
> journal_data_writeback /dev/sda1 $ sudo tune2fs -m 5 /dev/sda1 $ sudo 
> tune2fs /dev/sda1 -i 7d $ sudo tune2fs /dev/sda1 -c 15 $ sudo tune2fs 
> -l /dev/sda1
> 
> Also set swappiness=5 since I got 32G ram and mounted /tmp and /var/logs into RAM so they get deleted on every reboot or shutdown.
> echo "vm/swappiness=5" >> /etc/sysctl.conf
> 
> Fstab
> UUID=522567a9-0f7d-475c-b495-661dc5569599 / ext4  data=writeback,noatime,discard 0 1
> tmpfs        /tmp        tmpfs   noatime,nodev,nosuid,noexec,mode=1777   0       0
> tmpfs        /var/log    tmpfs   defaults,noatime,mode=0755              0       0
> 
> Set FF to use memory for cache
> about:config
> Add a new string key named:
> browser.cache.disk.parent_directory
> set its value to:
> /tmp


-- 
Ben "Obi-Wan" Hollingsworth    obiwan at jedi.com    PrairieRimImages.com
   The stuff of earth competes for the allegiance I owe only to the
     Giver of all good things, so if I stand, let me stand on the
       promise that You will pull me through.  -- Rich Mullins _______________________________________________
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