32GB SDHC UHS-I Memory Card under $5

Just wanted to share this.

BesBuy has this 32GB SDHC UHS-I Memory Card (48 MB/s R/W) $4.99 + Free S/H. This is not the fastest SD card in term of R/W speed, and I don't know if it is any good for you to use it on a PogoPlug Mobile to boot off an external OS. But, I placed an order of 2x and will plan to use them on my Android TV Boxes to boot external OSes. Right now, my Android TV Boxes are using an old 1 GB (10 MB/s R/W) SD card to boot external OS, i.e. LIbreELEC, etc., and I can tell the booting process is fast. So, a 48 MB/s R/W speed should be better. I wonder if such a 48 MB/s R/W speed will be fast enough to handle 1080p video stream recording (write). Anyway, unlike an Android OS, LibreELEC is a stripped down lean mean OS and boots very fast.

habibie Wrote:
-------------------------------------------------------
I wonder if such a 48
> MB/s R/W speed will be fast enough to handle 1080p
> video stream recording (write). Anyway, unlike an
> Android OS, LibreELEC is a stripped down lean mean
> OS and boots very fast.

Argh, I have to heavily edit what I said, but if the unit is quadcore and you have 48MB/sec write speed, it should be well within the specs of 1080p to record.*

I noticed BestBuy has 16 GB SanDisk USB 2.0 sticks for $4.99 this week, and for other slow things those are fully reliable and I'm not sure I've had one expire yet.

One graphics adapter and one quadcore to go and I'll be back with you spending the pennies correctly - some of the best money I've ever spent is stuff you brought up Habibie.

* In my two years here it appears Gravelrash is the King of All Media and based on what he's said, 48/MB ought to have enough; real world may vary considerably. I suppose you'd want to stream your incoming through some of the RAM as a buffer, but I'd be interested to hear what Gravelrash has to say about it.

=========
-= Cloud 9 =-



Edited 2 time(s). Last edit at 08/27/2017 10:05PM by JoeyPogoPlugE02.

@Joey

With a 32 GB storage and a lean-mean OS like LibreELEC that eats up less than 1GB space, there should be plenty of storage to use as a temporary storage for recording some streams through Kodi using this Player Core Factory program add-on for Kodi. I am more interested in recording live TV News streams. Unfortunately, the recording process on Player Core Factory program add-on for Kodi is not like a record option on any DVR, i.e. Comcast and/ror DirecTV Boxes. If anyone here knows of a better one, I am all ears.

Just received my order with 2x 32 GB SD cards. After doing some testing on one of them (see below), I must say the quality of this SD card is not good at all, unfortunately. The next thing to do is to use it on my MXQ Pro S905 TV Box running with LibreELEC and see if it will work properly.

The output from using hdparm utility:

- hdparm output from 1-st test on a built-in SD card slot on my Dell computer.

[root@linux-rf8f:/home/local/PEOPLE/habibie 12%] # hdparm -tT /dev/mmcblk0p1

/dev/mmcblk0p1:
 Timing cached reads:   2396 MB in  2.00 seconds = 1198.01 MB/sec
 Timing buffered disk reads:  74 MB in  3.00 seconds =  24.63 MB/sec
0.140u+2.044s=0:14.26e(15.2%) TDSavg=0k+0k+0k max=4212k 159252+16576io 0pf+0sw

- hdparm output from 2nd test on a built-in SD card slot on my Dell computer.

[root@linux-rf8f:/home/local/PEOPLE/habibie 13%] # hdparm -tT /dev/mmcblk0p1

/dev/mmcblk0p1:
 Timing cached reads:   2208 MB in  2.00 seconds = 1103.92 MB/sec
 Timing buffered disk reads:  76 MB in  3.07 seconds =  24.75 MB/sec
0.151u+1.989s=0:13.48e(15.8%) TDSavg=0k+0k+0k max=4212k 165888+0io 0pf+0sw

- hdparm output from 3rd test on a built-in SD card slot on my Dell computer.

[root@linux-rf8f:/home/local/PEOPLE/habibie 14%] # hdparm -tT /dev/mmcblk0p1

/dev/mmcblk0p1:
 Timing cached reads:   2418 MB in  2.00 seconds = 1209.45 MB/sec
 Timing buffered disk reads:  74 MB in  3.09 seconds =  23.98 MB/sec
0.152u+1.996s=0:13.49e(15.8%) TDSavg=0k+0k+0k max=4212k 162816+0io 0pf+0sw

- hdparm output from 1-st test using an SD card slot on a USB3 dongle plugged into a USB3 port.

[root@linux-rf8f:/home/local/PEOPLE/habibie 15%] # hdparm -tT /dev/sdb

/dev/sdb:
 Timing cached reads:   2418 MB in  2.00 seconds = 1209.41 MB/sec
 Timing buffered disk reads: 162 MB in  3.02 seconds =  53.60 MB/sec
0.146u+2.181s=0:18.73e(12.3%) TDSavg=0k+0k+0k max=4212k 342000+8960io 0pf+0sw

- hdparm output from 2-nd test using an SD card slot on a USB3 dongle plugged into a USB3 port.

[root@linux-rf8f:/home/local/PEOPLE/habibie 16%] # hdparm -tT /dev/sdb

/dev/sdb:
 Timing cached reads:   2466 MB in  2.00 seconds = 1232.56 MB/sec
 Timing buffered disk reads: 158 MB in  3.00 seconds =  52.65 MB/sec
0.186u+2.124s=0:13.39e(17.1%) TDSavg=0k+0k+0k max=4212k 334848+0io 0pf+0sw

- hdparm output from 3-rd test using an SD card slot on a USB3 dongle plugged into a USB3 port.

[root@linux-rf8f:/home/local/PEOPLE/habibie 17%] # hdparm -tT /dev/sdb

/dev/sdb:
 Timing cached reads:   2506 MB in  2.00 seconds = 1252.76 MB/sec
 Timing buffered disk reads: 176 MB in  3.01 seconds =  58.50 MB/sec
0.155u+2.180s=0:23.92e(9.7%) TDSavg=0k+0k+0k max=4212k 370672+8640io 0pf+0sw
[root@linux-rf8f:/home/local/PEOPLE/habibie 18%] #

I did some R/W tests using this F3 - an alternative to h2testw and the performance is rather disappointing.

- R/W tests through an SD slot on my Dell Linux Desktop Computer with factory default VFAT filesystem.

[root@linux-rf8f:/home/local/PEOPLE/habibie 195%] # f3write /run/media/habibie/20A9-B86C
Free space: 29.01 GB
Creating file 1.h2w ... OK!
Creating file 2.h2w ... OK!
.
:
Creating file 29.h2w ... OK!
Creating file 30.h2w ... OK!
Free space: 0.00 Byte
Average writing speed: 13.74 MB/s
47.731u+134.895s=36:05.23e(8.4%) TDSavg=0k+0k+0k max=2116k 112+60887600io 0pf+0sw
[root@linux-rf8f:/home/local/PEOPLE/habibie 196%] # f3read /run/media/habibie/20A9-B86C     
                  SECTORS      ok/corrupted/changed/overwritten
Validating file 1.h2w ... 2097152/        0/      0/      0
Validating file 2.h2w ... 2097152/        0/      0/      0
.
:
Validating file 29.h2w ... 2097152/        0/      0/      0
Validating file 30.h2w ...   25504/        0/      0/      0

  Data OK: 29.01 GB (60842912 sectors)
Data LOST: 0.00 Byte (0 sectors)
               Corrupted: 0.00 Byte (0 sectors)
        Slightly changed: 0.00 Byte (0 sectors)
             Overwritten: 0.00 Byte (0 sectors)
Average reading speed: 25.84 MB/s
49.148u+20.830s=19:09.99e(6.0%) TDSavg=0k+0k+0k max=2860k 60843008+0io 0pf+0sw
root@linux-rf8f:/home/local/PEOPLE/habibie 197%] #

- R/W tests through an SD slot on my Dell Linux Desktop Computer with EXT4 filesystem.

[root@linux-rf8f:/home/local/PEOPLE/habibie 229%] # f3write /run/media/habibie/0f485b23-fcb7-45d7-b637-acbabd0d0540
Free space: 28.40 GB
Creating file 1.h2w ... OK!                           
Creating file 2.h2w ... OK!                         
.
:
Creating file 29.h2w ... OK!                        
Free space: 16.00 MB
Average writing speed: 11.33 MB/s
48.520u+175.848s=44:59.16e(8.3%) TDSavg=0k+0k+0k max=2548k 15648+59546520io 0pf+0sw
[root@linux-rf8f:/home/local/PEOPLE/habibie 230%] # f3read  /run/media/habibie/0f485b23-fcb7-45d7-b637-acbabd0d0540     
                  SECTORS      ok/corrupted/changed/overwritten
Validating file 1.h2w ... 2097152/        0/      0/      0
Validating file 2.h2w ... 2097152/        0/      0/      0
.
:
Validating file 28.h2w ... 2097152/        0/      0/      0
Validating file 29.h2w ...  810824/        0/      0/      0

  Data OK: 28.39 GB (59531080 sectors)
Data LOST: 0.00 Byte (0 sectors)
               Corrupted: 0.00 Byte (0 sectors)
        Slightly changed: 0.00 Byte (0 sectors)
             Overwritten: 0.00 Byte (0 sectors)
Average reading speed: 25.22 MB/s
48.858u+25.070s=19:12.57e(6.4%) TDSavg=0k+0k+0k max=2548k 59531080+0io 0pf+0sw
[root@linux-rf8f:/home/local/PEOPLE/habibie 231%] #

- Read tests through an SD slot on a USB3 dongle with EXT4 filesystem. Write tests failed.

[root@linux-rf8f:/home/local/PEOPLE/habibie 203%] # f3read /run/media/habibie/20A9-B86C
                  SECTORS      ok/corrupted/changed/overwritten
Validating file 1.h2w ... 2097152/        0/      0/      0
Validating file 2.h2w ... 2097152/        0/      0/      0
.
:
Validating file 29.h2w ... 2097152/        0/      0/      0
Validating file 30.h2w ...   25504/        0/      0/      0

  Data OK: 29.01 GB (60842912 sectors)
Data LOST: 0.00 Byte (0 sectors)
               Corrupted: 0.00 Byte (0 sectors)
        Slightly changed: 0.00 Byte (0 sectors)
             Overwritten: 0.00 Byte (0 sectors)
Average reading speed: 58.79 MB/s
49.877u+25.353s=8:25.37e(14.8%) TDSavg=0k+0k+0k max=2540k 60843816+0io 0pf+0sw
[root@linux-rf8f:/home/local/PEOPLE/habibie 204%] # 

JoeyPogoPlugE02 Wrote:
-------------------------------------------------------
> habibie Wrote:
> --------------------------------------------------
4
> 8/MB ought to have enough; real world may vary con
> siderably. I suppose you'd want to stream your inc
> oming through some of the RAM as a buffer, but I'd
> be interested to hear what Gravelrash has to say a
> bout it.


:) Nailed it Joey

Gravelrash Wrote:
-------------------------------------------------------
> JoeyPogoPlugE02 Wrote:
> --------------------------------------------------
> -----
> > habibie Wrote:
> > ------------------------------------------------
> --
> 4
> > 8/MB ought to have enough; real world may vary c
> on
> > siderably. I suppose you'd want to stream your i
> nc
> > oming through some of the RAM as a buffer, but I
> 'd
> > be interested to hear what Gravelrash has to say
> a
> > bout it.
>
>
> :) Nailed it Joey

+1

Remember the old and some new mediaplayer boxes that have 100Mbs Ethernet? those streams 1080p video just fine, too. So 48MB/s recording speed SD card is adequate with buffering.

-bodhi
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