Re: Partitioning between SDD and HDD

<J.Witvliet@xxxxxxxxx> · Wed, 26 Dec 2012 12:21:03 +0100

Just my 2 cents, though personal experience.

18 months ago i replaced on a machine the traditional hdd with a sdd. And indeed, it started and worked like greased lightning.
However, i installed it like i used to do, with swap....
One year (and many patches) later, i got that many bad blocks that the sdd was completely useless.

So sdd has it merrits but:
A) no swap on sdd, so either enough mem, or swap on traditional hddm
B) keep things like /var so on hdd
C) if you _realy_ enough mem, put /var and /tmp on tmpfs (eg, in mem)

Hans

Van: Eddie G. O'Connor Jr. [mailto:eoconnor25@xxxxxxxxx]

Verzonden: Friday, December 21, 2012 08:23 PM W. Europe Standard Time
Aan: Community support for Fedora users <users@xxxxxxxxxxxxxxxxxxxxxxx>

Onderwerp: Re: Partitioning between SDD and HDD

    On 12/21/2012 11:51 AM, Alan Evans
      wrote:

          On Fri, Dec 21, 2012 at 6:35 AM,
            Eddie G. O'Connor Jr. wrote:

              You mean that all
                this hype over SSD's and they're LIMITED? I thought they
                were supposed to be BETTER than the spinning drives of
                today? Exaclty how are they better if they come
                "out-of-the-box" with limitations? Just curious...

        It's well known that flash devices have
          a limited number of writes. This number is pretty high,
          though. And with caching and load-balancing built into the
          drive's firmware, it is typically not a major concern.

          However, although SSD devices have lightning-fast read
          performance, writing to them is considerably slower. Think of
          the difference between reading a big file from a flash thumb
          drive versus writing a big file. That doesn't mean that you
          should never write to them, but if the intended use involves
          writing very frequently (like /var or /tmp) then it might not
          be a good fit.

        Also, SSD is much more expensive,
          byte-for-byte, than a hard drive. If you want a lot storage
          (my /home partition is well over a terabyte) then SSD is
          pretty cost prohibitive.

        On the other hand, my system drive is
          SSD and, because of the fast read performance, my computer
          boots, after the BIOS screen, in four seconds. From the login
          screen to my desktop is another 2-3 seconds. Starting even
          very large applications is pretty snappy.

    WOW!.....talk about speeding up. Well I have a Gateway laptop so
    there's not physical way I could do 2 different types of drives, but
    I also have a CentOS desktop, maybe I can do it there, is SSD
    something that an old "Pentium 4" PC could use? I think I'll look
    into this...do some Googling! Thanks for the info!

    EGO II

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