My Tests On Sd/cf Card Speed

[unplug]

I know there are threads but I want to keep this under 6k.
I used:

Code: [Select]

time dd if=/dev/zero of=/zeros count=65536; time syncfor writing speed test; and

Code: [Select]

time dd if=zeros of=/dev/null; time syncfor reading speed test.

I added up "real" from both and have the following results. I kind of mixed fat32 and ext2, does not have significant differences.

Code: [Select]

Card                      Write(sec)    Speed(mb/sec)        Read(Sec)      Speed(mb/sec)
SanDisk sd 512mb    27.757         1.153                      23.472           1.363
Apacer sd 60x 1g      22.337         1.433                      21.512           1.488
Vinking cf 128mb      25.912         1.235                      16.812            1.903
It seems getting a 60x sd card is a bad investiment  . I will borrow a faster cf and see if it is still the case.

One thing I noticed was when I tried ext2, it seemed that writing was faster but it took longer to sync. Hence no significant difference.

Guess I don't have to spend more $$ on faster card.

[unplug]

Ok, I got my friend's cf and did the test again.

Code: [Select]

Card                      Write(sec)    Speed(mb/sec)        Read(Sec)      Speed(mb/sec)
RiData 80x 512 cf     13.198         2.425                    17.149            1.866
Does not see a good investment either.

Hope you find this helpful.