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手机格式化SD卡降低性能

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发表于 2008-4-24 13:44 | 显示全部楼层 |阅读模式
昨天入手了两片卡,一个是金士顿1GSD,一个是金士顿1GMicroSD。第一次用手机格式化的时候,必死机,两片都是。% z* u/ V9 ]( S. O2 b2 n5 _

- k; C5 L1 W2 k- z拔电池重启以后,发现两片卡都能正常使用。但是用VFSMark测试性能出现很大的下降。都从近800分降低到600多分,而且在实际使用中能明显感觉到差异,比如用Nvbackup备份的时候,进度条明显变慢。备份时间从3分25秒延长至4分45秒。
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7 h7 p# a  I% Q+ J* ~3 L; x4 s性能的变化太大了,值得引起重视。$ ?3 R* L2 w" A: v3 D* b- l: H0 \

9 H/ `+ d) F) g# L不知道该怎么格式化才是最好的呢????
 楼主| 发表于 2008-4-24 13:48 | 显示全部楼层
有人说采用16K/簇格式化sd卡,性能将得到提升,还给出了dos下格式化命令:1 B8 W# j2 d' a# H& J' H6 f
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Format k: /fs:fat32 /a:16K7 h* {8 Q. K8 B( W* k

: O: D6 Y# C  W# x6 `7 @2 O9 }$ B但是我在winxp下运行cmd,再入这串命令,却不能格式化,说簇太大了,不知何解
发表于 2008-4-24 13:53 | 显示全部楼层
我用32k格式化,没有任何有慢的感觉 VFSMark 520多分
 楼主| 发表于 2008-4-24 14:03 | 显示全部楼层
LS的卡是怎么格式化的?
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) i$ G7 D+ k6 r  C- h4 `* h  r卡是什么型号的?
发表于 2008-4-24 14:16 | 显示全部楼层

回复 4# visior 的帖子

format X: /FS:FAT32 /A:16K3 {3 M3 q; u9 H% \4 Y/ U+ C
(or maybe format X: /FS:FAT32 /A:32K)) A+ v7 f( M& H+ y, S
where "X" is the drive letter.& a. \- K) n6 j7 m6 h& s

+ c2 ~2 T" G* B0 Z" r卡型号: Transcend 8G SDHC Class 6
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+ o1 R# T$ |2 n' z& ~# h, }你的卡不是SDHC的,也许不用这么格式吧? SDHC是SD 2.0的标准,支持FAT32格式,2GB以上的卡……也许你的卡用FAT格式的就可以了' M. Z& B- g! L
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[ 本帖最后由 alandeng19 于 2008-4-24 14:18 编辑 ]
发表于 2008-4-24 14:20 | 显示全部楼层
From what I understand, the cards will work much slower if you format them on your Treo.2 r( \) }5 X+ H  u3 V% q
You can use one of the following methods to format a card on XP so that the Treo can read it - and it should be fast....
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& p: n* ]+ A5 a" J/ s5 B- xformat X: /FS:FAT32 /A:16K
1 `4 x8 m" D* X' Q(or maybe format X: /FS:FAT32 /A:32K)
4 B) S6 H7 D# e$ K- r# s2 {$ s. lwhere "X" is the drive letter.7 v- L6 [- o" _# o! t: i
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"Go to "Control Panel" then select "Computer Management."- M( m) U$ X" S
Under "Storage", select "Disk Management" and when that reads and pops up, select the volume attributable to your card (on my PC, it's "N:" because I have a whole bunch of USB removable drives, but it may be a different letter on your PC), then right click.   {9 d* q% M: l% N* ?
Select "Format" after you right click, then select FAT32 under "File system" and 32K under "Allocation unit size".
* p9 p9 l+ d9 j2 fMake sure you check the box for "Perform a quick format" because I've heard that for some reason data corrupts on the card if you don't. 9 H) @: b: n/ a4 d9 I+ o
Then click OK and you're good to go.
( Y) B7 Z9 x) D- d+ XIt should take only a few seconds, certainly not more than a minute, to format.  If it takes more than a few minutes, then you probably have a defective card."
' B! [+ n' Q, G- A/ wI've seen advice that recommends an allocation unit size of 16kb and 32kb.  I don't know for sure which is best, but the card speed testing software seems to slightly favour 32kb.
发表于 2008-4-25 15:09 | 显示全部楼层
原帖由 visior 于 2008-4-24 13:48 发表
( P8 D$ J- l9 }1 X. B" u有人说采用16K/簇格式化sd卡,性能将得到提升,还给出了dos下格式化命令:
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8 B6 T5 _  H1 v3 x. p; P' dFormat k: /fs:fat32 /a:16K
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但是我在winxp下运行cmd,再入这串命令,却不能格式化,说簇太大了,不知何解

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, q" s0 j& r, R% C, d" J换成4K 试试?我发现在windows 的磁盘簇大小也仅仅是4K
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