Comments on: No SWAP Partition, Journaling Filesystems, … on a SSD?

By: robert

robert — Thu, 02 Feb 2012 19:57:21 +0000

@SV: Thats not possible as all modern SSDs have a chip for wear leveling – take a look at:

http://en.wikipedia.org/wiki/Wear_leveling

By: SV

SV — Wed, 01 Feb 2012 10:02:29 +0000

The thing is,

the calculations with the SSD failing in 8 seconds are unfortunately possible even with the newest SSDs.
32nm Flash has the life of approx 20k cycles and uses considerably big sizes.
Unless one properly utilizes TRIM and uses an optimized OS for a SSD, one can go bad in less than a week (my experience with cheap MLC non-SandForce 64G OCZ and Corsair SSDs).
All you need is a program that uses block based access to the SSD and “touches” the same block many times per second (in my case a ionode benchmark).
And the SSD went 5 feet under REALLY fast. Just sharing my 2 cnts

By: ppetrov

ppetrov — Sat, 17 Dec 2011 23:00:05 +0000

BRILIANT!

GJ you deserve a mythbuster badge!

By: Choosing an SSD « hblok.net - Linux, Electronics and Tech

Choosing an SSD « hblok.net - Linux, Electronics and Tech — Sat, 09 Apr 2011 21:09:38 +0000

[...] Robert Penz goes into details to bust some of the myths around SSD. He concludes that on a normal user system, you don’t need to take special consideration when switching from spinning to solid drives. Only on the advice of using “noatime” he seems incorrect, challenged by this thread: “noatime is not necessary. Fedora defaults to relatime , which is a better choice: it reduces disk access almost as much as noatime, but preserves enough atime info for practical purposes”. tags: Corsair, ext4, Fedora, ssd, TRIM older » Panorama » No Responses to "Choosing an SSD". Add a comment? or Follow comments by RSS? Be the first and share your thoughts! [...]

By: rex

rex — Thu, 10 Mar 2011 08:45:20 +0000

i would like my grand children to have my usb/ssd with all my data in it

By: Romania

Romania — Mon, 29 Nov 2010 23:00:29 +0000

********************************
> 100,000 write cycles

Worst possible scenario:
>
> 50 MB/s writes / 4 KB/block-write = 12,800 block-writes per second
> 100,000 writes life cycle / 12,800 writes per second = 7.8 SECONDS before failure
************************************
??? i don’t understand this math; you divide number of writes with # blocks and you get seconds?!
so again… writes per blocks means time?

your case is that: w speed of 50mb/s equals 12800 blocks writen/s, or 1 w cycle/12800 blocks in a second. presuming all ssd size is 50mb, one has to write on it 100000 times (@ 1 cycle/s) or 27,7 hours of writes second by second in the same place…

By: Installing Ubuntu 10.04 Server on a USB Stick | Stochastic Bytes

Installing Ubuntu 10.04 Server on a USB Stick | Stochastic Bytes — Sat, 10 Jul 2010 00:19:32 +0000

[...] Some people think that using a journaling filesystem will prematurely wear a USB stick, but this guy doesn’t think so. [...]

By: cane

cane — Sun, 11 Apr 2010 07:36:57 +0000

I ordered Patriot SSD (http://www.patriotmemory.com/products/detailp.jsp?prodline=8&catid=21&prodgroupid=141&id=911&type=17) – manufacturer gives 10 years warranty for this disk. Do we really need to worry about data stored on such SSD more than on ordinary HD? I don’t think so…

By: Marius Gedminas

Marius Gedminas — Fri, 09 Apr 2010 02:11:32 +0000

Some anecdotic data: the 16 GB SSD in my Asus EeePC 900 died in under a year, with read errors in the spot that used to contain the ext3 journal.

I suspect poor write leveling and decided to go with ext2 in the replacement drive.

By: SSD recommendations? - Hardware Canucks

SSD recommendations? - Hardware Canucks — Tue, 23 Feb 2010 18:05:37 +0000

[...] boring or familiar, just complex. I'm researching it myself. This was my jump-off point: No SWAP Partition, Journaling Filesystems, … on a SSD? | Robert Penz Blog Still reading… __________________ "On a clear drive, you can seek forever." (HP-UX [...]