David Wilkinson wrote:
David Wilkinson wrote:
I tested this card on my Windows 7 x64 desktop machine (using an
external card
reader) and got very similar results:
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
Crystal Dew World :
http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 18.171 MB/s
Sequential Write : 11.250 MB/s
Random Read 512KB : 17.789 MB/s
Random Write 512KB : 0.356 MB/s
Random Read 4KB (QD=1) : 3.058 MB/s [ 746.6 IOPS]
Random Write 4KB (QD=1) : 0.003 MB/s [ 0.8 IOPS]
Random Read 4KB (QD=32) : 4.018 MB/s [ 981.0 IOPS]
Random Write 4KB (QD=32) : 0.003 MB/s [ 0.8 IOPS]
Test : 1000 MB [I: 24.4% (7.3/29.8 GB)] (x5)
Date : 2012/06/13 9:28:28
OS : Windows 7 Ultimate Edition SP1 [6.1 Build 7601] (x64)
-----------------
So I guess it is the card...
After considerable research, I bought a new card:
SanDisk 32GB Extreme SDHC Memory Card (SDSDRX3-032G-A21) - 45MB/s
and got dramatically better results for the 4KB writes (on my Windows
7 machine):
-----------------------------------------------------------------------
CrystalDiskMark 3.0.1 (C) 2007-2010 hiyohiyo
Crystal Dew World : http://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 18.063 MB/s
Sequential Write : 17.264 MB/s
Random Read 512KB : 17.653 MB/s
Random Write 512KB : 1.591 MB/s
Random Read 4KB (QD=1) : 2.721 MB/s [ 664.2 IOPS]
Random Write 4KB (QD=1) : 1.194 MB/s [ 291.6 IOPS]
Random Read 4KB (QD=32) : 2.422 MB/s [ 591.3 IOPS]
Random Write 4KB (QD=32) : 0.928 MB/s [ 226.5 IOPS]
Test : 1000 MB [I: 0.0% (0.0/29.7 GB)] (x5)
Date : 2012/06/15 13:51:56
OS : Windows 7 Ultimate Edition SP1 [6.1 Build 7601] (x64)
Next step: try it in my Windows 8 tablet and put my SeaMonkey profile
on it.
Question: if you were me, would you format it as NTFS? Or just leave
well alone and hope I do not want to copy files bigger than 4GB onto it.
Good question, and I don't know the answer. Theoretically if you
format NTFS and retest and performance is bad you can use the SD
Formatter from the SD Association (
https://www.sdcard.org/downloads/formatter_3/ ) to format it back to
Fat32 for optimal performance, but I have never done it and don't know
that it would get it back to the same performance it has now. It
might be worth using it to format the poor performing one back to
Fat32 and retest to see if it makes a difference. That might give you
a hint what you want to do with the new one.
--
Jim
_______________________________________________
support-seamonkey mailing list
[email protected]
https://lists.mozilla.org/listinfo/support-seamonkey
