ReadyBoost compatible SD cards?

[Fred B.]

Anyone find a list of ReadyBoost compatible SD cards? Have seen several
lists, but most all contain only Flash Drives.

 

[Justin]

Anyone find a list of ReadyBoost compatible SD cards? Have seen several
lists, but most all contain only Flash Drives.

That's mostly because, in general, card readers are not supported. While
some do work, it would seem no worth wild list has been created. I couldn't
find one for you In the case of a built in SD slot in say, a notebook,
I guess that's enough of a minority to not have been given a spotlight
either.

I did however find a couple tidbits here:

http://www.grantgibson.co.uk/blog/index.php/2006/09/16/readyboost-chart/

 

[Stephan Rose]

Anyone find a list of ReadyBoost compatible SD cards? Have seen several
lists, but most all contain only Flash Drives.

Don't even waste your money. You're better off spending it on more RAM for
your system.

--
Stephan
2003 Yamaha R6

å›ã®ã“ã¨æ€ã„出ã™æ—¥ãªã‚“ã¦ãªã„ã®ã¯
å›ã®ã“ã¨å¿˜ã‚ŒãŸã¨ããŒãªã„ã‹ã‚‰

 

[Doug]

When I tried ReadyBoost with a 4GB usb drive I made the mistake of allowing
Vista to use the entire device. When a week later it failed to show up on
the list of devices and I got a message something like "No such device
found", so if you try it, be sure to reserve a small part as an ordinary
drive to provide a toehold so that you can communicate with it and perhaps
chkdsk it and/or reformat it. As it is I have the device and can find no way
of using it for anything. It seems to have been trashed.

But it even when it was up and running it brought about no detectable
improvement in performance. I had 2GB RAM. From my brief attempt I feel it's
not worth spending any time thinking about ReadyBoost.

 

[Swingman]

"Doug" wrote in message

When I tried ReadyBoost with a 4GB usb drive I made the mistake of
allowing Vista to use the entire device. When a week later it failed to
show up on the list of devices and I got a message something like "No such
device found", so if you try it, be sure to reserve a small part as an
ordinary drive to provide a toehold so that you can communicate with it
and perhaps chkdsk it and/or reformat it. As it is I have the device and
can find no way of using it for anything. It seems to have been trashed.

But it even when it was up and running it brought about no detectable
improvement in performance. I had 2GB RAM. From my brief attempt I feel
it's not worth spending any time thinking about ReadyBoost.

\
Pretty much my experience ... to the point that I have actually been
contacted by MSFT after seeing one of my posts here in regard to ReadyBoost.

I did manage to re-format the 2GB SD that ReadyBoost mangled and put it back
in use, but am reluctant to put anything but wiki-on-a-stick on it.

 

[Stephan Rose]

"Doug" wrote in message
\
Pretty much my experience ... to the point that I have actually been
contacted by MSFT after seeing one of my posts here in regard to ReadyBoost.

I did manage to re-format the 2GB SD that ReadyBoost mangled and put it back
in use, but am reluctant to put anything but wiki-on-a-stick on it.

The thing about Ready boost is that it can't work. If it does, then the
system is so under spec that it should probably be running DOS 6.0

Flash writes slower than a hard drive. Period. While it does read faster
due to no seek times (though I am not sure about raw read bandwidth of a
HD vs Flash with seek times taken out), it still can't read faster than the
available bandwidth. The available bandwidth to flash card readers is
significantly lower than that to hard drives over IDE or SATA.

Here are some specs on USB Flash drives and their respective read & write
speeds.

http://www.everythingusb.com/hardware/Storage/USB_Flash_Drives.htm

The best drive on that list has a read bandwidth of 34 mb/sec and a
write bandwidth of 28mb/sec. It gets worse from there.

SATA on the other hand has a bandwidth up to 150mb/sec and SATAII doubles
this to 300mb/sec.

So even if you cut the bandwidth in half to account for seek time losses,
hard drives still win.

There is no way Readyboost *can* work. It would need a direct hardware
interface to the CPU like RAM has. Then, maybe then, it would work.

Not even Solid state disks directly access their flash memory. Even they
have to use RAM as a buffer between their flash memory and the
interface to the PC to achieve their speeds.

The only thing ReadyBoost is boosting is Microsoft's Marketing Hype.

--
Stephan
2003 Yamaha R6

å›ã®ã“ã¨æ€ã„出ã™æ—¥ãªã‚“ã¦ãªã„ã®ã¯
å›ã®ã“ã¨å¿˜ã‚ŒãŸã¨ããŒãªã„ã‹ã‚‰

 

[Justin]

The thing about Ready boost is that it can't work. If it does, then the
system is so under spec that it should probably be running DOS 6.0

I disagree. I also disagree with the "just buy more memory" comments. I
have a laptop that is maxed out with 1GB, runs vista "ok" and using
readyboost helps to make it a little more responsive.

 

[AJR]

Stephan's dialogue is more like a triade (whatever that means).

Few "true" comments:

1. A ReadyBoost cache is created by Vista (via Superfetch) whether or not
you use an external ReadyBoost device.
2. ReadyBoost is utilized for non-sequential reads/writes - sequential
read/writes are directed to the HD. Therefore performance boost varies and
depends on type of HD "action".
3. If Vista "OKs" a device for ReadyBoost use - it is signifying that the
above read/writes will be faster to the device than the HD.
4. A ReadyBoost external device will not, repeat will not, improve
performance when utilized with desktops with "newer" HD specs.
5. A ReadyBoost device will improve performace when the HD Vista
performance index is 5 or lower - which is why ReadyBoost is "excellent' in
laptops.
6. ReadyBoost also "tracks" bootup and application usage over a period of
time and will improve boot time
7. ReadyBoost works in conert with two other "Ready.." functions -
ReadyDrive (Specific HD requirements) and unfortunately I do not recall the
third Ready utility.
8. Data written to the ReadyBoost device is encrypted and cannot be
accessed by "normal" means (Explorer, etc.)
9. An idea of activity is indicated by the device LED.

 

[Swingman]

in message

The thing about Ready boost is that it can't work. If it does, then the
system is so under spec that it should probably be running DOS 6.0

Your understanding of the concept, and disk access/random reads, is flawed
.... do some more homework.

 

[Stephan Rose]

in message


Your understanding of the concept, and disk access/random reads, is flawed
... do some more homework.

I've done my homework when I have written low level drivers for hard disk
io, flash io, and file systems to run on both for embedded devices.

I am quite aware of their differences, advantages and disadvantages.

--
Stephan
2003 Yamaha R6

å›ã®ã“ã¨æ€ã„出ã™æ—¥ãªã‚“ã¦ãªã„ã®ã¯
å›ã®ã“ã¨å¿˜ã‚ŒãŸã¨ããŒãªã„ã‹ã‚‰