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I chose 32KB clusters to attempt to improve write speeds since that's
the only complaint I have with SD cards in general. Overall I haven't
noticed too much of a difference.
Roger Prokic wrote:
>
>
> So which cluster size would be best?
> I look at the data below and I think 16k is the best...
> But I think it means that you can actually store less information the
> larger the cluster size as there will be space wasted more often than
> not???
>
> Roger
>
> On Mar 14, 2007, at 11:11 AM, Jason wrote:
>
> It's not the card that determines the default formatting but the OS
> that
> does it. I'm not sure what the Treo's default is, but XP uses 4k. I
> did this with a PC using the command-line format command that looks
> like:
>
>> format f: /a:32k
>
> I would imagine there's a Mac equivalent.
>
> You can get the 8GB cards from a number of places on-line. I keep an
> eye on dealuniversity.com, bensbargains.net and a couple of other
> bargain hunting sites and found the 8GB A-DATA card for about $40
> after
> rebate from newegg.com.
>
> Roger Prokic wrote:
>
>
>> Jason,
>> Are all cards defaulted to a 4k size cluster?
>> How do you format a card with a different cluster size?
>> Do you do this from the palm or on a PC?
>> (I have a Mac)
>
>> Roger
>
>> On Mar 14, 2007, at 1:59 AM, Jason wrote:
>
>
>>> I have a 680 and an 8GB A-DATA "super" card and ran a couple of
> tests.
>>> The first column is with the default formatting and stuff still
> on the
>>> card (not really a fair test). Column 2 is 32k clusters, column 3
>>> is 16k,
>>> column 4 is 8k, column 5 is 4k. The default if 4k so it looks like
>>> formatting the card helps clean out the crud:
>
>>> Default 32KB 16KB 8KB 4KB
>>> File Create: 69% 109% 484% 253% 227%
>>> File Delete: 69% 462% 128% 104% 181%
>>> File Write: 16% 22% 20% 18% 18%
>>> File Read: 682% 682% 692% 653% 644%
>>> File Seek: 1685% 1966% 1685% 1475% 1180%
>>> DB Export: 56% 70% 103% 64% 54%
>>> DB Import: 395% 416% 428% 412% 393%
>>> Record Access: 804% 905% 905% 861% 862%
>>> Resource Access: 914% 914% 800% 834% 768%
>>> VFSMark: 521 616 582 519 481
>
>>> I also noticed that if I re-ran the test without reformatting the
>>> card the
>>> results would drop. For example, a re-run with 32KB clusters gave a
>>> VFSMark of 573.
>
>>> For the hell of it I compared my 2GB, Ultra brand, 150x SD card and
>>> came
>>> up with a VFSMark of 869, though most of that was due to screaming
>>> creates
>>> (1561%) and deletes (1387%). Writes were only 11% and everything
>>> else was
>>> on par with the 8GB card.
>
>>> On Tue, 13 Mar 2007, Roger Prokic wrote:
>
>>> > Here is my results... Can I get others that have a Treo 680 and
>>> an 8GB card
>>> > to post their results?
>>> >
>>> > VFSMark Results Treo 680 TOPRAM 8GB SDHC
>>> >
>>> > File Create: 38%
>>> > File Delete: 12%
>>> > File Write: 14%
>>> > File Read: 635%
>>> > File Seek: 1475%
>>> > DB Export: 8%
>>> > DB Import: 345%
>>> > Record Access: 841%
>>> > Resource Access: 783%
>>> >
>>> > VFSMark: 461
>>> >
>>> > ---
- -Jason
- -----
--- There are no absolute statements. I'm very probably wrong. ---
"The difference between genius and stupidity is that genius has its limits."
- Albert Einstein
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