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+---- Thread: micro SD speed (/showthread.php?tid=268)
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RE: micro SD speed - tllim - 03-15-2016
(03-14-2016, 12:28 PM)janjwerner Wrote: jjwerner@localhost:~$ dd if=/dev/zero of=test oflag=direct bs=8M count=64
dd if=/dev/zero of=test oflag=direct bs=8M count=6464+0 records in
536870912 bytes (537 MB, 512 MiB) copied, 24.029 s, 22.3 MB/s
jjwerner@localhost:~$ dd if=/dev/zero of=test oflag=direct bs=8M count=64
536870912 bytes (537 MB, 512 MiB) copied, 24.0569 s, 22.3 MB/s
Sandisk Extreme 32GB U1 micro SD card
Good card, glad to know that read speed can achieve 22.3MB/sec.
RE: micro SD speed - Tassadar - 03-31-2016
(03-15-2016, 08:40 AM)tllim Wrote:(03-14-2016, 12:28 PM)janjwerner Wrote: jjwerner@localhost:~$ dd if=/dev/zero of=test oflag=direct bs=8M count=64
dd if=/dev/zero of=test oflag=direct bs=8M count=6464+0 records in
536870912 bytes (537 MB, 512 MiB) copied, 24.029 s, 22.3 MB/s
jjwerner@localhost:~$ dd if=/dev/zero of=test oflag=direct bs=8M count=64
536870912 bytes (537 MB, 512 MiB) copied, 24.0569 s, 22.3 MB/s
Sandisk Extreme 32GB U1 micro SD card
Good card, glad to know that read speed can achieve 22.3MB/sec.
Should this micro sd read at least twice of the speed, shouldn't it?!
Did i missed something?
RE: micro SD speed - Andrew2 - 03-31-2016
(03-31-2016, 04:06 AM)Tassadar Wrote:(03-15-2016, 08:40 AM)tllim Wrote:(03-14-2016, 12:28 PM)janjwerner Wrote: jjwerner@localhost:~$ dd if=/dev/zero of=test oflag=direct bs=8M count=64
dd if=/dev/zero of=test oflag=direct bs=8M count=6464+0 records in
536870912 bytes (537 MB, 512 MiB) copied, 24.029 s, 22.3 MB/s
jjwerner@localhost:~$ dd if=/dev/zero of=test oflag=direct bs=8M count=64
536870912 bytes (537 MB, 512 MiB) copied, 24.0569 s, 22.3 MB/s
Sandisk Extreme 32GB U1 micro SD card
Good card, glad to know that read speed can achieve 22.3MB/sec.
Should this micro sd read at least twice of the speed, shouldn't it?!
Did i missed something?
You can't exceed ~22MB/s sequential read/write speed on Pine64. But that doesn't matter that much since random I/O is way more important therefore you should choose a card that shines here. For some insights please read through this thread.