Status of SSDs under Fedora ?
aph at redhat.com
Fri Jun 11 09:13:16 UTC 2010
On 06/10/2010 11:19 PM, Phil Meyer wrote:
> On 06/10/2010 03:56 PM, Linuxguy123 wrote:
>> On Thu, 2010-06-10 at 14:50 -0700, Konstantin Svist wrote:
>>> On 06/10/2010 01:53 PM, Linuxguy123 wrote:
>>>> I'm thinking of getting an Intel 160 GB SSD. How would it work under
>>>> Linux ?
>>>> I'm using ext4 for that drive right now. Is there a better filesystem
>>>> for SSDs ?
>>>> Is there anything that I should be aware of as far as switching ?
>> Have you run an SSD ? Is longevity really an issue or is it folklore ?
> It is bot real and folklore! :)
> The fact is that any SSD, or other NAND type device has a limited number
> of writes per address. The real question is:
> "With your data needs and patterns, will you actually need to write to
> the same address over 100,000 times?"
> For most people, that is a big fat NO. The drives are smart enough to
> re-arrange data around failed memory addresses. So what happens most
> often is a very slight decrease in available space over time.
> The advice given is just smart, because most file systems will update
> the same physical disk 'block' containing inode data whenever a file is
> accessed (atime). The chances of that update hitting the exact address
> every time is quite high.
> So, theoretically, if you just read a file on an SSD 100,000 times you
> could destroy a single address location on the SSD.
No, because all the SSDs you can buy today do some kind of wear levelling.
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