On Wednesday, October 23, 2013 17:51:27 dragorn wrote: > On Wed, Oct 23, 2013 at 02:18:50PM -0400, Chris Knadle wrote: > > On Wednesday, October 23, 2013 12:04:17 John Mort wrote: > > > Thanks Matthias. From the lack of response I'm guessing no one has > > > experience with SSHD yet. I might look at an OS SSD for linux, and a > > > HDD > > > for linux storage, and will probably just stick with a small HDD for > > > windows since that's only used for gaming and the games I play (FPS & > > > RTS) > > > don't load new maps or areas often enough to make it worth the expense. > > > > In the computer I built for my Dad I used an SSD for the OS (this is my > > first use of an SSD), but put the /home directory/partiton on a HDD. > > Some people go through the effort of making sure that the logs go to the > > HDD insted of the SSD, but for a Desktop box there aren't a lot of these > > so I didn't bother; we'll see how long that lasts. [Linus Torvalds > > recently had the SSD drive he was using for Linux development up and quit > > completely on him, and I didn't hear if he was ever able to get any data > > off that drive after the failure.] > > > > I've never used a SSHD drive yet.
SSHD drives can apparently either be setup in a "self-optimized mode" in which case the drive looks "just like a drive" to the OS, and does whatever optimization using the Flash that it figures out on its own, or there's a "host optimized mode" in which case the OS (and thus the admin) chooses how to use the Flash for optimization. https://en.wikipedia.org/wiki/Hybrid_drive I found one reference article that discusses one particular SSHD drive: http://reviews.cnet.com/laptop-hard-drives/seagate-laptop-thin-sshd/4505-9997_7-35628720.html The article above sounds like it likely refers to "self-optimized mode" in which the drive tries to "learn" on its own what to keep in the Flash. > As I recall, hybrid drives require linux kernel support to move > frequently-used blocks to the hybrid partition, and perform a raid-ish > overlay on the block io system. Realistically the above description (which I think is the "host-optimized mode") sounds like the way any experienced person would want to use the drive. To me this all sounds confusing. I can understand using an SSD drive or a HDD, but I can't figure out why I'd want a SSHD drive. ? -- Chris -- Chris Knadle [email protected]
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