<div dir="ltr"><div><div><div><div>I have to agree with pretty much all that Chris said, keeping in mind that the price difference between HDD and SSD is still a factor for me. I've seen many HDDs fail over the years, but I've yet to see an SSD fail (yes, they're still too young to do a proper failure rate comparison).<br><br></div>I just recently replaced the SSD in my Windows desktop client with an Adata 512gb SSD for $230 (<a href="http://www.canadacomputers.com/product_info.php?cPath=179_1229_1088&item_id=076683">http://www.canadacomputers.com/product_info.php?cPath=179_1229_1088&item_id=076683</a>). I couldn't get Windows install to work with this new drive until I disabled SMART on it. I don't have any clue why that worked. All of the Googling I did for the error I was getting said to turn on SMART, but it was already on, so I tried the opposite of what the whole world was saying and sure enough, it worked. I do still get some driver issues (and BSODs) that I didn't get before the rebuild, and that SSD is the only hardware that got changed. So draw your own conclusions.<br><br></div><div>The drive that I replaced, a Samsung 256TB SSD, is still salvageable, if you're concerned. The Windows install on it was so Frankensteined that I decided to start over from scratch. Luckily I have one of those toaster drive bays that I could pop the Samsung into to recover any data from the drive. While I was worried that the drive itself failed, it seems to be running ok in the toaster.<br></div><br></div>Back to the original topic, however... Right now my primary Linux desktop client has an el-cheapo motherboard that doesn't offer SATA III so while an SSD might help, I wouldn't be able to get the full bang for the buck. So I'm using an older HDD while I dream of rebuilding everything in that desktop from scratch.<br><br>Also, I have some NAS boxes that use 2, 3 or even 4 TB HDD drives. I imagine it will be years and years before we can get 4TB SSD for what I paid recently for 4TB HDD. So for the time being I'm stuck with HDD for my network storage solutions.<br><br></div>My Lenovo laptop came with a 1 TB HDD and a 16gig mSATA. It's almost three years old now. I use the mSATA as a swap partition (I have 8 gig RAM). I think the jury is still out on whether or not you should use mSATA as a swap drive, but I had to use it for something. I would love to replace the HDD in the laptop with a SSD, for all the reasons Chris mentioned. In fact, once I scrape together a few bucks I just might pop out the 1TB HDD for a 512 TB SSD, but I'm not sure it will be the same Adata.<br><div><br></div><div>So you can be sure that once SSD prices drop even more (or the next breed of even faster, cheaper drives comes along), I will start replacing my aging HDDs as quickly as I can.<br></div><div><br><br></div></div><br><div class="gmail_quote"><div dir="ltr">On Thu, 12 Nov 2015 at 12:00 Chris Irwin <<a href="mailto:chris@chrisirwin.ca">chris@chrisirwin.ca</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Wed, Nov 11, 2015 at 11:45:59PM +0000, B.S. wrote:<br>
> The real world scenario is - can one, and which, trust these<br>
> newfangled SSD drives? And, aside from the is the price different<br>
> worth it, especially vis a vis the purported increase in speed<br>
> (anecdotal evidence here says no), is the price and capacity<br>
> differential over spinning drives worth it / are they more/less<br>
> reliable than said spinning drives?<br>
<br>
If we're counting anecdotes, I'll put mine on record and say that I will<br>
never, ever have (or willingly use interactively) a system based on an<br>
mechanical HDD again. Hell, even my remove VM (on linode) is backed<br>
entirely by SSDs now.<br>
<br>
SSDs are Faster - yes you might not "notice" anything but boot times<br>
when switching to an SSD, but you do notice switching back to an HDD<br>
once you're used to it.<br>
<br>
Also, considering my primary machine is now a laptop:<br>
<br>
* No moving parts. Spinning a disk at 5400 or 7200 RPM, then skimming<br>
the heads just barely off the surface in a device *that moves* is just<br>
the craziest idea ever. Back when I was a student, the amount of free<br>
pizza I got for replacing dead laptop hard drives was obscene. When<br>
was the last time I had to worry about head parking or drop sensors?<br>
<br>
* Much reduced power consumption on my laptop (yeah, I couldn't put it<br>
aside :)<br>
<br>
HDDs are still great for bulk data storage, simply due to price per GB.<br>
That's backups, home movies, flac cd rips, videos, etc.<br>
<br>
> (Putting aside the eco/power consumption elements, here. And never<br>
> mind that avoiding single point of failure means you're going to have<br>
> multiple/redundant storage, of whatever technology used.)<br>
<br>
I treat all drives like they are going to fail any moment, also<br>
regadless of technology used. This happens. A lot. I have a stack of<br>
dead/dying hard drives at home. I only have one dead ssd so far. I<br>
currently own and use seven SSDs, and down to seven in-use hard drives,<br>
plus my two external backup hard drives.<br>
<br>
I currently put more trust in SSDs than HDDs. Almost all my HDDs are<br>
raid1 pairs because I consider their failures to be exceedingly common<br>
(especially any drives purchased in the year or so following the<br>
Thailand flooding). All my SSDs are individual drives that I can recover<br>
from backups. I'm prepared, but not actively expecting it.<br>
<br>
> They note that warnings of imminent problems are well exposed, giving<br>
> one time to address, to at least as good a level as spinning disks.<br>
> Spinning or not, ignore such warnings at your peril.<br>
<br>
Yes and no. I believe the larger studies (like that by google) found<br>
that SMART errors were a reliable forcast for failure, but the lack of<br>
SMART errors can not be assumed to indicate a healthy drive.<br>
<br>
I've had hard drives fail without warning, and gracefully migrated from<br>
drives with errors.<br>
<br>
My failed SSD had no errors before death.<br>
<br>
> People were backing up to optical media for said permanent storage<br>
> that turned out not to be. (Optical media having dyes, and dyes fade<br>
> ...) Along the way, the amount of data to be archived seems to have<br>
> grown exponentially - thus some of the reason for the growth to the TB<br>
> drives we see available today. Given the low SSD capacities vis a vis<br>
> these TB drives, they do not seem to fit this purpose. Thus whether or<br>
> not they retain their data, when we know the more cost effective<br>
> spinning drives do, isn't so important to me.<br>
<br>
The advantages of SSDs (seek times, throughput, etc) do not apply to to<br>
sitting on a shelf, but all it's negatives (mainly capacity & price) do.<br>
You just can't beat hard drives right now, regardless of where we fall<br>
on SSD reliability.<br>
<br>
Archival SSD devices are something only SSD manufacturers need to<br>
consider right now.<br>
<br>
Regardless of storage medium, you'll want a way to verify data, even if<br>
the drive "works". A filesystem that can do checksums on it's own would<br>
be helpful...<br>
<br>
> Thus, I guess, cloud growth as off-site backup/archival storage. Which<br>
> has its own excessive costs, and risks.<br>
<br>
I currently back up to 2x 2TB hard drives, which are swapped weekly and<br>
dragged to work. If disaster strikes, my recovery estimates involve<br>
"drive to work", "buy hard drive on the way home", and "SATA/Disk<br>
transfer speeds". I can do the recovery with just a LiveUSB and a<br>
replacement drive.<br>
<br>
With cloud backup, I also have to factor in slower transfer speeds,<br>
bandwidth caps (300GB/mo would take me three months to restore all my<br>
data), and possibly a *client* I need to install and configure first,<br>
which might mean *not* a LiveUSB.<br>
<br>
For a "normal" user, where a failed hard drive means a magical new one<br>
gets installed with a fresh copy of Windows/OSX, cloud backups make a<br>
lot more sense.<br>
<br>
--<br>
Chris Irwin<br>
<br>
email: <a href="mailto:chris@chrisirwin.ca" target="_blank">chris@chrisirwin.ca</a><br>
xmpp: <a href="mailto:chris@chrisirwin.ca" target="_blank">chris@chrisirwin.ca</a><br>
web: <a href="https://chrisirwin.ca" rel="noreferrer" target="_blank">https://chrisirwin.ca</a><br>
<br>
<br>
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</blockquote></div>