A few months ago I tried to make a bootable Nook Tablet SD card but failed (have not had any problems making bootable Win Drives), had other projects so gave up.
Am ready to try again so have decided to check everything I can find concerning making bootable mSD cards. A number of posts have recommended using SanDisk 4 to 6 speed SD cards.
Unfortunately most of my mSD cards are Non SanDisk so hope some of them can make a Successful Bootable mSD Card so appreciate any mention of successful Nook Tablet boot Non SanDisk SD cards.
"SD Strange-results - or - How I learned to love CM7 on SD - Dec-11 results compiled!" http://ift.tt/1VtrlZm swoozle posts "SMALL BLOCK RANDOM WRITES
where the Sandisk is FIFTY times the speed of the Patriot and ONE HUNDREDtimes the Kingston" The last post was 20th June 2013 so wonder what the SMALL BLOCK RANDOM WRITES values are for newer SD cards?
The last post tonestertm says "I started researching for a better test, found something incredibly technical and very comprehensive which I have not yet figured out how to use, and got to wondering... what file size and Queue Depth would best emulate the usage of a Nook Color SD install?" While this is for the Nook Color I hope this info will also be helpful for the Nook Tablet.
Would like to test my mSD cards concerning small block random writes or other factors for successful Nook Tablet SD card booting so am interested in what you consider to be the best Test App for this?
Should mention "micksh 29th April 2011 posted "the big issue is random access performance -- a figure that isn't taken into account in a card's class rating. Ironically, Microsoft discovered in its testing that cards with higher class ratings actually performed worse on Windows Phone 7 because the tweaks card manufacturers make to achieve high sequential throughput can actually hurt random access times." Tried to use link but got "404 Not Found"
Also am wondering what robot8 mentioned "No way to tell on the card or packaging. Even the same cards from the same brand may perform differently. The speeds vary from batch to batch. No way to tell until you actually benchmark it. YMMV. FWIW, I'd avoid Class 6 and higher cards as they are optimized for high speed sequential r/w and generally perform well on small block random reads but poorly for writes. You will probably get better results from most Class 2 or Class 4 cards. After a couple of weeks pulling my hair out due to random FCs and blaming the Nook/CM7/OC kernel/apps, I realized the problem was due to the SD cards, at first I could not believe it as I was using expensive Class 6 and 10 "performance" cards. Well, they may perform well for shooting and viewing videos, but they sure suck when running an OS. I now have zero problems since the switch and swear by Class 4/8G Sandisks" Is this still correct?
Am ready to try again so have decided to check everything I can find concerning making bootable mSD cards. A number of posts have recommended using SanDisk 4 to 6 speed SD cards.
Unfortunately most of my mSD cards are Non SanDisk so hope some of them can make a Successful Bootable mSD Card so appreciate any mention of successful Nook Tablet boot Non SanDisk SD cards.
"SD Strange-results - or - How I learned to love CM7 on SD - Dec-11 results compiled!" http://ift.tt/1VtrlZm swoozle posts "SMALL BLOCK RANDOM WRITES
where the Sandisk is FIFTY times the speed of the Patriot and ONE HUNDREDtimes the Kingston" The last post was 20th June 2013 so wonder what the SMALL BLOCK RANDOM WRITES values are for newer SD cards?
The last post tonestertm says "I started researching for a better test, found something incredibly technical and very comprehensive which I have not yet figured out how to use, and got to wondering... what file size and Queue Depth would best emulate the usage of a Nook Color SD install?" While this is for the Nook Color I hope this info will also be helpful for the Nook Tablet.
Would like to test my mSD cards concerning small block random writes or other factors for successful Nook Tablet SD card booting so am interested in what you consider to be the best Test App for this?
Should mention "micksh 29th April 2011 posted "the big issue is random access performance -- a figure that isn't taken into account in a card's class rating. Ironically, Microsoft discovered in its testing that cards with higher class ratings actually performed worse on Windows Phone 7 because the tweaks card manufacturers make to achieve high sequential throughput can actually hurt random access times." Tried to use link but got "404 Not Found"
Also am wondering what robot8 mentioned "No way to tell on the card or packaging. Even the same cards from the same brand may perform differently. The speeds vary from batch to batch. No way to tell until you actually benchmark it. YMMV. FWIW, I'd avoid Class 6 and higher cards as they are optimized for high speed sequential r/w and generally perform well on small block random reads but poorly for writes. You will probably get better results from most Class 2 or Class 4 cards. After a couple of weeks pulling my hair out due to random FCs and blaming the Nook/CM7/OC kernel/apps, I realized the problem was due to the SD cards, at first I could not believe it as I was using expensive Class 6 and 10 "performance" cards. Well, they may perform well for shooting and viewing videos, but they sure suck when running an OS. I now have zero problems since the switch and swear by Class 4/8G Sandisks" Is this still correct?
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