Am 2008-02-27 21:10:03, schrieb Anders Breindahl:
> For example, Lenovo's new X300 laptop is equipped solely with a SSD for
> nonvolatile storage. Apparently they consider SSD's to be mature enough
> for $HOME, as you put it.
The eeePC has an SSD too...
> Also, that link shows some interesting wear statistics. I'm reading that
> with below-industry-standard wear levelling of 50%, one could
> continuously shred the drive of an Eee pc for 2 to 13 years before cells
> would fail. And that's for 10^5 write cycle drives. The Wikipedia
> article mentions that 10^6 up to 5*10^6 write cycle drives exist.
>
> I.e., other factors omitted, you could continuously push data onto such
> a 4GB 10^6 high-endurance drive at 50% levelling at 10MB/s for
>
> 4*10^9/10^7*10^6 * 0.5 / (3600*24*365.2524) = 6.3 years
If I write 1 MByte per second linear on a SDD like then I will never
reach to kill the SDD. The problem are logfiles, the TMP directory,
mailspool, /var/lib/postgres and such.
EVEN my HOME is heavily used since I compile stuff in it.
> Or taking advantage of the capacity for wear levelling, a 64GB of Eee PC
> quality (matching the X300's, assumably):
>
> 64*10^9/10^7*10^5 * 0.5 / (3600*24*365.2524) = 10.1 years
It is ONLY theorie.
> Why would this not suffice for server applications? Especially
> considering the good random access times of SSDs, and the fact that we
> will use these drives in RAIDs anyway?
I have killed a new bueyd 4 GByte "SanDisk Ultra II" (27 Euro in Germany)
in less then one month writing a copy of my ~/Maildir to it and the read
it ober "courier-imap"...
A normal 2"5 HDD (PATA) was gone in around 10 Month... so why should a
SSD be longer live, if it can not beat a HDD physicaly.
Thanks, Greetings and nice Day
Michelle Konzack
Systemadministrator
Tamay Dogan Network
Debian GNU/Linux Consultant
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