[prev in list] [next in list] [prev in thread] [next in thread] 

List:       fedora-list
Subject:    32Gb class 10 mSD - Re: SD card programing -
From:       Robert Moskowitz <rgm () htt-consult ! com>
Date:       2015-04-30 14:41:01
Message-ID: 55423EFD.4080803 () htt-consult ! com
[Download RAW message or body]

Just got this pointer in an email:

http://view.newsletter.rakuten.com/?j=fe8815707c6d017473&m=fe8d12717c62077d7c&ls=fe5f1 \
37175660d7e7112&l=ff2416797d6c&s=fe5a157373660c7b7210&jb=ff3615717167&ju=fe6616747665027f7016&r=0


I have bought a number of items from Rakuten and a happy with them.



On 04/30/2015 10:08 AM, Robert Moskowitz wrote:
> 
> 
> On 04/30/2015 09:08 AM, Dave Ihnat wrote:
> > On Wed, Apr 29, 2015 at 10:46:38PM -0400, Robert Moskowitz wrote:
> > > I have a Microcomputer center a couple miles away, and they have mSD
> > > cards by the dozens at the checkout counters.  Each comes with the
> > > SD adapter.  I think I just spent $9 each for a few more 16Gb cards
> > > for my testing.
> > I've been using the EMTec cards carried by MicroCenter.  I don't trust
> > no-name or store-branded cards.  There are just too many fraudulent 
> > cards
> > out there.  I've considered using MicroCenter's, just because I can 
> > go back
> > to the store if there are problems, but the difference in price 
> > hasn't been
> > worth it.
> 
> That is why I blow away their partitions and do my own, even if I want 
> a DOS partition.  I once, REALLY, got a USB stick from ecost.com that 
> had this strange hidden partition on it with this interesting code 
> that had an IP address imbedded in it.
> 
> > Also, another thing you should consider is that there are speed 
> > classes of SD
> > cards from 3-10.  You want Class 10--10MB/s.  You'll often see Class 
> > 2,4,
> > and 6 cards at great prices--there's a reason.
> 
> I am looking at the card I got last week and it says C10.
> 
> > I hate to recommend a Microsoft-based solution--try running it under
> > wine or something, if it offends the sensibilities--but look for, get
> > and run a little ditty called h2testw.exe (best site would be the 
> > source,
> > http://www.heise.de/download/h2testw.html--it's a German author and 
> > site,
> > but you can figure it out.)  There are Linux alternatives--the one that
> > comes to mind is F3:
> > 
> > http://oss.digirati.com.br/f3/
> > 
> > Others, and some discussion of the problem:
> > 
> > https://www.raymond.cc/blog/test-and-detect-fake-or-counterfeit-usb-flash-drives-bought-from-ebay-with-h2testw/
> >  
> > Some think that a RPi OS running off a SD card should be "tuned"; others
> > dismiss this, as the card specs give a large number of R/W ops before 
> > MTBF.
> > Nevertheless, especially if you're going to run 24x7, some things just
> > make sense:
> > 
> > o Turn on noatime in fstab
> > o Use tmpfs in fstab
> > o Use a bigger card--not for storage space, but wear leveling.
> 
> The latest uboot for F22 (and kernel) can just have uboot on the SD 
> card and then switch to your sata for everything else.  That is the 
> nice thing about Cubies (and Wands and a few others).  Real sata 
> port.  Hans is working on USB drive support out of uboot, but I have 
> not heard if he has that working yet.  There are a few things that 
> won't made F22 and we will have to wait for F23 for them.
> 
> > As far as size--Raspbian comes as a 2GB image, which you expand to 
> > use the
> > capacity of the card.  If you'r not going to do a lot of local data
> > storage, 8GB will work well (and be a lot cheaper).  16GB is a nice
> > compromise on cost/capacity (and wear leveling, if you believe in 
> > that as
> > an issue).  32GB is pricy, and if you're thinking about that much 
> > storage
> > maybe you want to hang a USB HDD or even SDD off the box; after all, 
> > we now
> > have four USB ports with the Pi 2.
> 
> Better to go with a smallish SD and put on a USB drive for your root 
> and such.
> 

-- 
users mailing list
users@lists.fedoraproject.org
To unsubscribe or change subscription options:
https://admin.fedoraproject.org/mailman/listinfo/users
Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
Have a question? Ask away: http://ask.fedoraproject.org


[prev in list] [next in list] [prev in thread] [next in thread]