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SSD life and zero writing?

post #1 of 20
Thread Starter 
I was wondering whether it's ok to zero write an ssd(nvm trim takes care of that) with dban, and why ssd life tells me that it expects my vertex to last until 2019, when ssds are advertised as having 2 million hour life spans. What I really need to know is, how I make everything else install by default on my hdd after installing windows on the ssd.
Edited by peacepcf - 5/14/11 at 1:26pm
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post #2 of 20
Isn't the expected life a calculated guess not written in stone. another get out clause like the advertised "up to" read write speeds.

I generally secure erase writing 0's to the drive with Parted Magic
Edited by moonmanas - 5/14/11 at 1:29pm
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post #3 of 20
Thread Starter 
well even if its a guess, 220 vs 8 years is quite a big difference
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post #4 of 20
Quote:
Originally Posted by peacepcf;13504371 
well even if its a guess, 220 vs 8 years is quite a big difference

To be honest seems a lot of BS around ssd's, do you think that's enough grounds to send one back for a refund? IE it's sold saying it has x million hours expected life and when you run a health program on it you get like 8 years?
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post #5 of 20
Thread Starter 
Not intending on sending mine back, i was just curious at why theres such a big difference.
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post #6 of 20
Quote:
Originally Posted by peacepcf;13503843 
I was wondering whether it's ok to zero write an ssd(nvm trim takes care of that) with dban, and why ssd life tells me that it expects my vertex to last until 2019, when ssds are advertised as having 2 million hour life spans. What I really need to know is, how I make everything else install by default on my hdd after installing windows on the ssd.

You can change the default install location with a quick registry change.
Quote:
Originally Posted by moonmanas;13503916 
I generally secure erase writing 0's to the drive with Parted Magic

This doesn't work for SSDs because of the way they remap blocks for wear leveling. Your zeros are often written to completely different blocks than the ones the operating system thinks are being written.

The only completely secure way to erase a SSD is to use the built-in secure erase functionality, and that's only if the manufacturer implemented it properly. Many don't, especially with older SSDs. Then again, in practice getting at any remnants of the data would require disassembling the SSD and accessing the flash chips directly, bypassing the controller. So it's relatively safe to just zero out the drive, but I wouldn't trust that for anything truly sensitive. I also would never run an unencrypted SSD for any reason, but my needs for security are much higher than the average OCN member. smile.gif
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post #7 of 20
The secure erase with Parted Magic IE this http://www.ocztechnologyforum.com/forum/showthread.php?81321-Secure-Erase-With-bootable-CD-USB-Linux..-Point-and-Click-Method

Always gets my drive back to full speed, diskpart using "clean" command or "clean all" does not, I can understand why the "clean" does not but not the other as the "clean" command doesnt actually clean, just marks files for deletion when overwritten. Havent looked into why the "clean all" doesnt I just know from experience that using diskpart my WEI scores drop on a vertex2 to 7.5 from 7.7 and a vertex3 from 7.9 to 7.8. And a C300 from 7.9 to 7.7. And the speeds suffer.

The option in Parted Magic once clicked on will if drive supports it use the drives internal feature to secure erase , a window pops up asking if you want to do that.

The first option, (External DD Disk) doesnt do a good job either though I dont know why ...
Edited by moonmanas - 5/14/11 at 3:55pm
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post #8 of 20
It went up to 9.8 from 7.9!1!

Typo lol
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post #9 of 20
Quote:
Originally Posted by RussianJ;13505208 
It went up to 9.8 from 7.9!1!

Typo lol

Haha well spotted better alter it biggrin.gif is it correct now lol
Edited by moonmanas - 5/14/11 at 3:58pm
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post #10 of 20
Thread Starter 
thanks guys, I wont zero write my ssd, since TRIM is already there, but I will with all my hdds
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