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Subject Author Date
PCMCIA swap drive Urs Enke 06-18-2006
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Posted by Urs Enke on June 18, 2006, 10:47 pm
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Hi, can anyone tell me whether in XP, a PCMCIA (type-II disk/flash) drive can
be used for the swap file? If so, can there at all be circumstances where this
will actually benefit performance, say, in the case of heavy non-swap activity
of the built-in HD?

This is about increasing performance of a Fujitsu-Siemens P1120 subnotebook,
which at least officially cannot (but unofficially can?) get a RAM upgrade.

Thanks for any comments!
Urs



Posted by M.I.5¾ on June 19, 2006, 3:39 am
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> Hi, can anyone tell me whether in XP, a PCMCIA (type-II disk/flash) drive
> can be used for the swap file? If so, can there at all be circumstances
> where this will actually benefit performance, say, in the case of heavy
> non-swap activity of the built-in HD?
>
> This is about increasing performance of a Fujitsu-Siemens P1120
> subnotebook, which at least officially cannot (but unofficially can?) get
> a RAM upgrade.
>

In theory you could. But you would get a performance drop. FLASH memory is
vastly slower than the installed hard disk. A PCMCIA disk drive would also
be slower than the installed disk drive (and indeed the PCMCIA interface is
much slower, even in its Cardbus incarnation).



Posted by Barry Watzman on June 19, 2006, 12:11 pm
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The correct terminology is "PC Card" not "PCMCIA Card".

You could use a PC Card drive for the swap file. However, you would
NEVER want to do that with a flash drive, only with a real (rotating
platter mechanical) hard drive. There are two issues with flash drives:

First, they are horribly slow compared to real hard drives.

Second, they are Flash memory, and flash memory has a limited number of
write cycles before it's life expectancy is used up and it fails. While
the number is large in terms of uses like MP3 players and digital
cameras (remember, the limit applies only to writes), using flash memory
as a swap file would destroy the flash drive relatively quickly.

Also even if you had an infinitely large drive as fast as the connection
channel (for a PC Card, this would be PCI bus speeds, same as the
internal IDE hard drive), it would not be a substitute for a RAM
upgrade. Once the swap drive reaches about 2 to 3 times the total size
of RAM, a larger swap drive gives very little additional benefit.



Urs Enke wrote:
> Hi, can anyone tell me whether in XP, a PCMCIA (type-II disk/flash) drive can
> be used for the swap file? If so, can there at all be circumstances where this
> will actually benefit performance, say, in the case of heavy non-swap activity
> of the built-in HD?
>
> This is about increasing performance of a Fujitsu-Siemens P1120 subnotebook,
> which at least officially cannot (but unofficially can?) get a RAM upgrade.
>
> Thanks for any comments!
> Urs
>
>

Posted by M.I.5¾ on June 21, 2006, 2:54 am
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> The correct terminology is "PC Card" not "PCMCIA Card".
>
> You could use a PC Card drive for the swap file. However, you would NEVER
> want to do that with a flash drive, only with a real (rotating platter
> mechanical) hard drive. There are two issues with flash drives:
>
> First, they are horribly slow compared to real hard drives.
>
> Second, they are Flash memory, and flash memory has a limited number of
> write cycles before it's life expectancy is used up and it fails. While
> the number is large in terms of uses like MP3 players and digital cameras
> (remember, the limit applies only to writes), using flash memory as a swap
> file would destroy the flash drive relatively quickly.
>
> Also even if you had an infinitely large drive as fast as the connection
> channel (for a PC Card, this would be PCI bus speeds, same as the internal
> IDE hard drive), it would not be a substitute for a RAM upgrade. Once the
> swap drive reaches about 2 to 3 times the total size of RAM, a larger swap
> drive gives very little additional benefit.
>
>

And the correct place for your response is at the bottom of the post, not
the top.

>
> Urs Enke wrote:
>> Hi, can anyone tell me whether in XP, a PCMCIA (type-II disk/flash) drive
>> can be used for the swap file? If so, can there at all be circumstances
>> where this will actually benefit performance, say, in the case of heavy
>> non-swap activity of the built-in HD?
>>
>> This is about increasing performance of a Fujitsu-Siemens P1120
>> subnotebook, which at least officially cannot (but unofficially can?) get
>> a RAM upgrade.
>>
>> Thanks for any comments!
>> Urs



Posted by Barry Watzman on June 21, 2006, 8:28 am
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The correct place for my response is wherever I choose to put it.

M.I.5¾ wrote:
>
>>The correct terminology is "PC Card" not "PCMCIA Card".
>>
>>You could use a PC Card drive for the swap file. However, you would NEVER
>>want to do that with a flash drive, only with a real (rotating platter
>>mechanical) hard drive. There are two issues with flash drives:
>>
>>First, they are horribly slow compared to real hard drives.
>>
>>Second, they are Flash memory, and flash memory has a limited number of
>>write cycles before it's life expectancy is used up and it fails. While
>>the number is large in terms of uses like MP3 players and digital cameras
>>(remember, the limit applies only to writes), using flash memory as a swap
>>file would destroy the flash drive relatively quickly.
>>
>>Also even if you had an infinitely large drive as fast as the connection
>>channel (for a PC Card, this would be PCI bus speeds, same as the internal
>>IDE hard drive), it would not be a substitute for a RAM upgrade. Once the
>>swap drive reaches about 2 to 3 times the total size of RAM, a larger swap
>>drive gives very little additional benefit.
>>
>>
>
>
> And the correct place for your response is at the bottom of the post, not
> the top.
>
>
>>Urs Enke wrote:
>>
>>>Hi, can anyone tell me whether in XP, a PCMCIA (type-II disk/flash) drive
>>>can be used for the swap file? If so, can there at all be circumstances
>>>where this will actually benefit performance, say, in the case of heavy
>>>non-swap activity of the built-in HD?
>>>
>>>This is about increasing performance of a Fujitsu-Siemens P1120
>>>subnotebook, which at least officially cannot (but unofficially can?) get
>>>a RAM upgrade.
>>>
>>>Thanks for any comments!
>>>Urs
>
>
>

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