ronobvious
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New Pi2 ordered. Any limit on micro-SD card size?

Wed Feb 04, 2015 6:30 pm

Looks like the 8GB card standard w/ NOOBS gets thrown around a lot. I probably won't need NOOBS. Just wondering if it's worth to get a 64GB card or larger. I also need to know if theres a size limit the Pi will support. That's it!

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B.Goode
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Re: New Pi2 ordered. Any limit on micro-SD card size?

Wed Feb 04, 2015 6:35 pm

From http://www.raspberrypi.org/forums/viewt ... 63&t=98428
How big an SD card can I use?


The SD card Interface is the same, so this is the same as the B+, cards up to 64GB have worked successfully.

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FTrevorGowen
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Re: New Pi2 ordered. Any limit on micro-SD card size?

Wed Feb 04, 2015 7:28 pm

ronobvious wrote:Looks like the 8GB card standard w/ NOOBS gets thrown around a lot. I probably won't need NOOBS. Just wondering if it's worth to get a 64GB card or larger. I also need to know if theres a size limit the Pi will support. That's it!
Personally I mainly use 8 or 16Gb uSDHC cards (I have one 32Gb card), partially because of cost and reduced risk of fakes, but also because, on the rare occasion I might need more storage space for data, I prefer to use a USB stick for that purpose**. It really depends on what you want to do with your Pi.
Trev.
** It's less likely to get lost and, on principle, a "good idea" to keep data a programs/O.S. separate because the O.S. can be reloaded, (experimental) data may not be so.
Still running Raspbian Jessie or Stretch on some older Pi's (an A, B1, 2xB2, B+, P2B, 3xP0, P0W, 2xP3A+, P3B+, P3B, B+, and a A+) but Buster on the P4B's & P400. See: https://www.cpmspectrepi.uk/raspberry_pi/raspiidx.htm

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Re: New Pi2 ordered. Any limit on micro-SD card size?

Wed Feb 04, 2015 7:36 pm

If you are going to buy such a large card, make sure its from a reputable vendor and that its not too cheap. Big cards have a much higher chance of being fakes. 8 GB cards aren't really worth the effort because real ones are cheap. Personally I'd stick with an 8GB card for the OS and use spinning rust (a HDD) for a lot of storage.
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Re: New Pi2 ordered. Any limit on micro-SD card size?

Wed Feb 04, 2015 9:54 pm

I use 8GB microSDs (in adapters where needed) for everything.
My RPi2B is getting a SATA 160GB hard drive in a USB 2.0 enclosure. So I could get away with a much smaller microSD card on that one.

The limit is 512GB (for about £800).
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KLL
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Re: New Pi2 ordered. Any limit on micro-SD card size?

Thu Feb 05, 2015 4:44 am

ronobvious wrote:Just wondering if it's worth to get a 64GB card or larger.
i think the question is in so far valid as i also see the prizes for SD cards dropping drastically.
? even more as USB sticks?
BUT when i think about the backup i would not want to read, keep on HD.. ( and later write ) a SD card bigger as 8GB.
Ahmm, is there a way to make a RPI system 8GB size on a bigger SD card and make a data partition from the rest of it? instead to tell raspi-config to use full SD.

ktb
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Re: New Pi2 ordered. Any limit on micro-SD card size?

Thu Feb 05, 2015 6:02 am

I use a 64GB SanDisk card with Raspbian.
SanDisk Ultra PLUS microSDXC UHS-I Memory Cards
64GB 40 MB/s Read, Write speed lower microSD C10 & U1 Yes

I also have one of the these:
SanDisk Extreme PLUS microSDHC UHS-I Card for Action Cameras
32GB Up to 80/50MB/s** read/write speed microSDHC C10, U3

I feel like any of the pricier cards are not really worth it with the Pi (depending on your use/needs). I've found the Pi to be a faster and much more reliable system when using an external drive for the root file system. I'd recommend going that route if you want more space.

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KLL
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Re: New Pi2 ordered. Any limit on micro-SD card size?

Thu Feb 05, 2015 8:34 am

ktb wrote: SanDisk Ultra PLUS microSDXC UHS-I Memory Cards
64GB 40 MB/s Read, Write speed lower microSD C10 & U1 Yes

SanDisk Extreme PLUS microSDHC UHS-I Card for Action Cameras
32GB Up to 80/50MB/s** read/write speed microSDHC C10, U3

I feel like any of the pricier cards are not really worth it with the Pi (depending on your use/needs).
wow, can you pls verify any of that speeds for us?
i just made a short test with 4 of my SD cards, using command

Code: Select all

rsync -ah --progress "from" "to"  
and copy a 10MB file
using /run/shm/ ( ramdisk )
as source for write test to SD
and target for read test from SD

Apacer 8GB (10) micro SD HC
ramdisk SD 6.37MB/s 4.74M bytes/sec
SD ramdisk 7.95MB/s 4.74M bytes/sec

SanDisk Ultra U1 16GB micro SD HC I
ramdisk SD 7.47MB/s 7.89M bytes/sec
SD ramdisk 9.13MB/s 7.89M bytes/sec

SanDisk Ultra 8GB (10) micro SD HC I
ramdisk SD 7.47MB/s 7.74M bytes/sec
SD ramdisk 8.42MB/s 7.89M bytes/sec

Kingston 8GB (4) micro SD HC
ramdisk SD 7.39MB/s 7.89M bytes/sec
SD ramdisk 8.36MB/s 7.89M bytes/sec

funny, the Kingston class 4 is faster as the apacer class 10

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DougieLawson
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Re: New Pi2 ordered. Any limit on micro-SD card size?

Thu Feb 05, 2015 10:33 am

I'm building a new server (to replace an ancient Viglen MPC-L) using my RPI2. I've decided to have /boot on the SDCard (so that's written to almost never) and the root fs on a 160GB SATA harddrive in a Xenta USB2.0 enclosure.

I've had to add

Code: Select all

max_usb_current=1
but it's working.
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ktb
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Re: New Pi2 ordered. Any limit on micro-SD card size?

Thu Feb 05, 2015 10:44 am

KLL wrote:
ktb wrote: SanDisk Ultra PLUS microSDXC UHS-I Memory Cards
64GB 40 MB/s Read, Write speed lower microSD C10 & U1 Yes

SanDisk Extreme PLUS microSDHC UHS-I Card for Action Cameras
32GB Up to 80/50MB/s** read/write speed microSDHC C10, U3

I feel like any of the pricier cards are not really worth it with the Pi (depending on your use/needs).
wow, can you pls verify any of that speeds for us?
i just made a short test with 4 of my SD cards, using command

Code: Select all

rsync -ah --progress "from" "to"  
and copy a 10MB file
using /run/shm/ ( ramdisk )
as source for write test to SD
and target for read test from SD

Apacer 8GB (10) micro SD HC
ramdisk SD 6.37MB/s 4.74M bytes/sec
SD ramdisk 7.95MB/s 4.74M bytes/sec

SanDisk Ultra U1 16GB micro SD HC I
ramdisk SD 7.47MB/s 7.89M bytes/sec
SD ramdisk 9.13MB/s 7.89M bytes/sec

SanDisk Ultra 8GB (10) micro SD HC I
ramdisk SD 7.47MB/s 7.74M bytes/sec
SD ramdisk 8.42MB/s 7.89M bytes/sec

Kingston 8GB (4) micro SD HC
ramdisk SD 7.39MB/s 7.89M bytes/sec
SD ramdisk 8.36MB/s 7.89M bytes/sec

funny, the Kingston class 4 is faster as the apacer class 10
Sorry, I should have been more clear. Those aren't my test speeds. Those are how SanDisk rates them. I don't think any Pi is capable of those kinds of numbers. I'll update this post with results for the 64GB card shortly. I use the 32GB to run Alpine Linux.

I'm not sure I completely follow your instructions, but I think this is what you want:

Code: Select all

cd ~
dd if=/dev/zero of=10mbtestfile bs=10485760 count=1
sudo cp 10mbtestfile /run/shm/

rsync -ah --progress /run/shm/10mbtestfile ~/10mbtestfile1
sending incremental file list
10mbtestfile
	10.49M 100%		16.84MB/s	0:00:00 (xfer#1, to-check=0/1)

sent 10.49M bytes	received 31 bytes	6.99M bytes/sec
total size is 10.49M  speedup is 1.00

sudo rsync -ah --progress 10mbtestfile1 /run/shm/10mbtestfile1
sending incremental file list
10mbtestfile1
	10.49M 100%		19.32MB/s	0:00:00 (xfer#1, to-check=0/1)

sent 10.49M bytes	received 31 bytes	20.97M bytes/sec
total size is 10.49M  speedup is 1.00
Note: That was the 64GB card in the Pi2B, overclocked to 1000/500/7.

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KLL
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Re: New Pi2 ordered. Any limit on micro-SD card size?

Thu Feb 05, 2015 11:57 am

you are right, 16MB/sec write, 19MB/sec read is worth the money!

ktb
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Re: New Pi2 ordered. Any limit on micro-SD card size?

Thu Feb 05, 2015 12:22 pm

KLL wrote:you are right, 16MB/sec write, 19MB/sec read is worth the money!
I was actually trying to say that I think these expensive cards are not really worth the money if they are for using in a Pi. Whatever works for you...

Here are results from the 32GB card on a B+, overclocked at 1200/525/8 and running Alpine Linux:

Code: Select all

10.49M 100%      13.53MB/s   0:00:00 (xfer#1, to-check=0/1)
10.49M 100%      15.01MB/s   0:00:00 (xfer#1, to-check=0/1)

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Re: New Pi2 ordered. Any limit on micro-SD card size?

Thu Feb 05, 2015 2:55 pm

the data look very good, but could that depend more on the
overclocking? as on the SD speed spec?
do you use a water cooled RPI? LOL
but i understand that just for a test you would not overwrite
your "highclass" SD with the default raspbian / settings.
and i remember there was a warning that spec. the overclocking
could damage somehow SD cards??

ktb
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Re: New Pi2 ordered. Any limit on micro-SD card size?

Thu Feb 05, 2015 3:16 pm

I'm not sure. I'll run some more tests.

64GB card, Pi2B, no overclock, no overvolt:

Code: Select all

10.49M 100%		13.47MB/s	0:00:00 (xfer#1, to-check=0/1)
10.49M 100%		12.93MB/s	0:00:00 (xfer#1, to-check=0/1)
10.49M 100%		13.81MB/s	0:00:00 (xfer#1, to-check=0/1)
10.49M 100%		13.83MB/s	0:00:00 (xfer#1, to-check=0/1)
No water-cooling. I just have a simple small heat sink with a mini fan on it and both of them are likely unnecessary under most conditions. Both of my RPi's sit near a drafty window and it's very cold outside. I've never seen the B+'s temps go above 42.2°C.

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KLL
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Re: New Pi2 ordered. Any limit on micro-SD card size?

Fri Feb 06, 2015 5:29 am

i picked a shop in internet and a SD cardsize of 32GB and a product ( i do not promote in any way ) but i wanted to have a idea about different types ( i did not know there are so many ) and actual prizes. / for info / the range is 0.65USD to 4USD / 1GB

prize in USD
SanDisk - 32GB SDSDB-032G-B35 Secure Digital High Capacity (SDHC) Card Class 4
21.00
SanDisk - Ultra 32GB SDHC UHS-I Class 10 Memory Card - Black/Gray/Red
24.99
SanDisk - Ultra Plus 32GB SDHC Class 10 UHS-1 Memory Card - Black/Gray/Red
24.99
SanDisk - 32GB Ultra Secure Digital High Capacity (SDHC) High Performance Card Class 6
27.79
SanDisk - Extreme 32GB SDHC Class 10 UHS-1 Memory Card - Black/Gold
27.99
SanDisk - Extreme PLUS 32GB microSDHC UHS-3 Class U-3 Memory Card - Red/Gold
34.99
SanDisk - Extreme PLUS 32GB SDHC UHS-3 Memory Card - Black
39.99
SanDisk - Extreme Pro 32GB SDHC Memory Card - Black/Red
39.99
SanDisk - Pixtor 32GB SDHC Class 10 Memory Card - Black/Red
69.99
SanDisk - Pixtor Advanced 32GB SDHC Class 10 UHS-3 Memory Card - Black/Gold
97.99
SanDisk - Extreme PRO 32GB SDHC/SDXC Class 3 UHS-II Memory Card - Black/Red
129.99

But i go for
Samsung EVO U1 32GB micro SDHC UHS-1 / Class 10 U1
20USD
the card has 48MB/s read write speed but i test
write 6.91MB/s / read 8.15MB/s not impressive at all.
write 10.52MB/s / read 12.12MB/s in TURBO overclocking mode
( still no idea if my benchmark is valid in any way? )
i try the 8GB system copy, and make a data partition.
and play with backup... details here http://kll.engineering-news.org/kllfusi ... rowstart=1

kylo43
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Re: New Pi2 ordered. Any limit on micro-SD card size?

Mon Jan 18, 2016 10:32 am

Ive tried a 128gb micro sd card. Wont read it. :(

drgeoff
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Re: New Pi2 ordered. Any limit on micro-SD card size?

Mon Jan 18, 2016 11:24 am

kylo43 wrote:Ive tried a 128gb micro sd card. Wont read it. :(
Then the card is faulty or you are doing something wrong. RPis do work with 128 Gbyte cards.

(Cards larger than 32 Gbyte are usually formatted as exFAT. RPis don't handle that. Writing an OS image overcomes that. If using NOOBS, first reformat the card to FAT32 as mentioned on these forums many times.)
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Kuchhogya
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Re: New Pi2 ordered. Any limit on micro-SD card size?

Tue Feb 16, 2016 12:49 pm

Both of my RPi's sit near a drafty window and it's very cold outside. I've never seen the B+'s temps go above 42.2°C.???

daxbea
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Re: New Pi2 ordered. Any limit on micro-SD card size?

Wed Mar 16, 2016 11:38 am

for pi 3 im using 128 gb. for pi 2 max would be 64.

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DougieLawson
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Re: New Pi2 ordered. Any limit on micro-SD card size?

Thu Mar 17, 2016 7:05 pm

daxbea wrote:for pi 3 im using 128 gb. for pi 2 max would be 64.
And your rationale for doing that is ...?
Any language using left-hand whitespace for syntax is ridiculous

Any DMs sent on Twitter will be answered next month.
Fake doctors - are all on my foes list.

Any requirement to use a crystal ball or mind reading will result in me ignoring your question.

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