More Persistent Storage Stuff part 2

re: More Persistent Storage Stuff part 2

Eugenia — Tue, 19 Jul 2005 04:17:56 GMT

Yo, Mike, VERY well said. Congrats!

WM 05's Persistent Storage from the Inside Out

MobileRead — Tue, 19 Jul 2005 23:30:10 GMT

With Windows Mobile 2005 coming to our cell phones and PDAs soon, you may want to become accustomed to the idea of "persistent storage", which means that in future all of your personal data, user-installed applications, and updates are stored in...

re: More Persistent Storage Stuff part 2

Shannon J Hager — Wed, 20 Jul 2005 10:02:02 GMT

I work with WinMobile PPC and SmartPhone quite a bit and the dead battery killing my GPRS settings on the PPC was the cause of more cursing towards Bill Gates than anything since my friend's Windows ME installation in 2001.

I doubt you'll get many developers or power users griping about this. The people who have thier PPC in the cradle 90% of the time might complain about the speed but only because they have benefitted from the design error up to this point.

Persistent Storage fiability?

Faenad — Wed, 20 Jul 2005 14:21:15 GMT

PS seems definitively a good thing on paper.

But what concerns me is the fiability of the Filestore.
On many devices I have seen the Filestore disappear without apparent reasons (Ipaq 19xx ; Toshiba e8xx, etc.).
The filestore wasn't appearing anymore using the build-In explorer, the memory settings panel or any other programm.
Most of the time an hard reset resolved the issue, but not always.

I haven't meet this problems yet on my Hx4700, but I don't use the filestore at all (I'm using a SD card for installing my programms)

Is Filestore fiability going to be improved? Have you taken into account such problems?
What will be happening on a WM2005 devices if the filestore became corrupted?

The Mobile Minute 106

Nino.Mobile — Fri, 22 Jul 2005 21:00:19 GMT

Since last night (Thursday), my smartphone has, literally, been my conduit to the world; I had to drive...

Blog link of the week 29

Daniel Moth — Mon, 25 Jul 2005 00:28:58 GMT

Blog link of the week 29

re: More Persistent Storage Stuff part 2

Carel — Mon, 25 Jul 2005 21:26:09 GMT

Although very interesting this "persistant memory" is confusing a lot a potential Pocket PC buyers who want to buy a VGA PDA the coming weeks....me included. With WM 2005 around the corner..should I buy a 64 Mb ROM device (with 128 Mb RAM - Loox 720 for example) or a 128 Mb ROM device (with 64 Mb RAM - Dell x50v for example)???? if waiting for these updates devices is not an option.
I've asked questions about this on some fora..but never got a convincing aswer. Perhaps something to add in this blog ;-)

re: More Persistent Storage Stuff part 2

Pepe — Tue, 26 Jul 2005 22:44:46 GMT

Seeing all the new features comming in WM5 I wonder if it is a good idea to buy an actual handheld today.

I can bet OEM are working on supporting DirectX, PS, etc.

re: More Persistent Storage Stuff part 2

windowsmobile — Wed, 27 Jul 2005 03:31:01 GMT

Dell has announced that they will be producing a WM5 upgrade to the X50v. I haven't heard (one way or the other) whether the Loox will be upgraded.

In terms of which stats are better for persistent storage, more ROM is better than more RAM.

As for whether to buy now or wait for a WM5 product, that's a classic problem with no easy answer. The only right answer is to weigh the tradeoffs and decide which are most important to you. Though, you can avoid the issue somewhat by buying a device today that has been announced to have a coming upgrade.

Mike Calligaro

re: More Persistent Storage Stuff part 2

Faenad — Thu, 28 Jul 2005 17:39:22 GMT

For the moment (WM2003 SE), 128RAM/64ROM is far better than the contrary.
64RAM is not enough, you always have to take care to install programms in SD/CF memory card or ROM (which is not always possible, and will degrade performance for some programms)

With WM2005, I believe 128ROM is not that much better than 64ROM, as SD card can be used instead of ROM.
By the way, the Loox 720 is planned to support WM2005.

More details on Exchange SP2 and Mobile 5

Citrix, Microsoft and Mobility integration from the front lines.... — Tue, 02 Aug 2005 00:17:22 GMT

More details on Exchange SP2 and Mobile 5

Citrix, Microsoft and Mobility integration from the front lines.... — Tue, 02 Aug 2005 00:18:10 GMT

re: More Persistent Storage Stuff part 1+2

buzz_lightyear — Sun, 07 Aug 2005 00:10:13 GMT

Hi Mike,

yes, PS IS very good thing. Thanx for that. Also thanx for these perfect blogs.
But by my experience, people still don't understand the PS. They are just confused by the memory/storage slider from previous WM versions and by the fact, that their flash storage device is no more visible as separate \Storage folder, because it is (of course) mounted as root fs.

Would you mind, if i publish your PS blogs on my web, please?

re: More Persistent Storage Stuff part 2

ginswizzle — Sun, 07 Aug 2005 11:12:02 GMT

For those of you that think you want more than 64MB of RAM... RAM is incredibly expensive - especially in comparision to Flash - and there would be a direct and very noticeable increase in the retail price of a device with more RAM. I know I certainly don't want Windows Mobile devices get any more expensive.

To whatever extent Persistent Storage reduces RAM usage... I think this is a GREAT thing.

re: More Persistent Storage Stuff part 2

windowsmobile — Mon, 08 Aug 2005 19:31:21 GMT

Buzz,

The memory slider certainly was confusing. Fortunately, it's gone in WM5. Now that control panel shows you how much storage you have and how much ram you have, without a slider to mix them. People used to the old way will need to get used to it, but I think it'll make more sense to new users than the slider did.

You're certainly welcome to link back to these blogs on your website. I'd prefer you didn't copy and paste the text though.

Mike Calligaro

re: More Persistent Storage Stuff part 2

buzz_lightyear — Tue, 09 Aug 2005 22:46:06 GMT

Thanx Mike,
I didn't copy and paste them. ;o) that's why I asked first.
But I will sure link it.

thanx again
buzz

re: More Persistent Storage Stuff part 2

Smartphone Idle — Tue, 16 Aug 2005 00:58:34 GMT

Mike,
let's say my phone ( WM 5.0 powered )goes to idle - you said RAM should not be refreshed in order to save power , right ?
this applies only to XIP based OS images,true ? (if my OS is RAM based then my OS will go away if not refreshing the RAM )

re: More Persistent Storage Stuff part 2 - Bad Guys

Derald Grimwood — Wed, 17 Aug 2005 11:13:58 GMT

According to HP support. HP has no such mechanism to clear persistant storage for the h5500 series IPAQ running WM2003.

Being Persistent.

Mikehall's Embedded WebLog — Thu, 08 Sep 2005 19:12:45 GMT

MikeCal has posted a series of articles over on the Windows Mobile team blog that cover Persistent Storage...

72 registry hack then?

pockettekcop — Sun, 23 Apr 2006 19:31:58 GMT

So, is there a way that we, the end-user, can modify the 72 hr rule so that we can use ALL of the battery within the device. I am always near an outlet.. be it AC or DC or SOLAR. Having the PPC always plugged in takes away from the mobility of the device now that i've found it is only using half of it's battery.
Registry hack?
.dll hack?

anything?

72 hour rule is an OS-BASED feature

Juan Alvarez — Sun, 25 Jun 2006 20:44:42 GMT

As for palm (OS5 with a 3rd party app), now there is a way for reducing the amount of power which is left in the battery and that cannot be used.

WM5 and some PPC2003 do this. But some older don't. Hmm.

This is an OS-BASED feature. I wonder if it is possible to Software-override it (it is already done, in some way). I am right, am I not?

re: More Persistent Storage Stuff part 2

MikeCal — Mon, 26 Jun 2006 20:00:03 GMT

The old 72 hour rule is an OEM feature brought about by an OS licensing requirement. On devices with volatile storage (where you lose your data if the batteries die) we required that a user could leave the office on Friday with low batteries and not lose his data by Monday when he got back to the charger at the office.

The way this requirement was handled was that the OEM's battery driver reported that it was critically low when it still had 72 hours of standby power in it. The OS automatically shuts down whenever the battery reports that it's critically low.

There were a few devices from HP that provided a slider that let the user say how long he wanted the device to last after critical shutdown. That slider was basically a way around the 72 hour rule. It shipped with the slider on 72 hours, thus meeting our requirement, but allowed the user to change it after the fact.

Because the code that makes this decision is in the OEM's battery driver, there's no general solution to users changing it. Every OEM device could potentially be different.

Remember that the 72 hour rule was removed in WM5. There's not much chance of anyone doing new development to enable ways around it on WM2003 devices.

Mike

Persistent Storage - Windows Mobile 2003 and Windows Mobile 5.0

Jason Langridge's WebLog - MR Mobile! — Mon, 03 Jul 2006 11:11:28 GMT

One of my colleagues Reed Robison published an internal summary of the great articles that Mike Calligaro...

re: More Persistent Storage Stuff part 2

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re: More Persistent Storage Stuff part 2

Mark Andrews — Tue, 31 Oct 2006 18:15:52 GMT

How does one add additional Persistent Storage?

i.e. How can you move messages recieved via email or contact location from the built in ROM to say a 1 gig or higher MMC or CF card?

re: More Persistent Storage Stuff part 2

jpertino — Wed, 04 Apr 2007 18:29:16 GMT

I'm developer.

We have a java aplication, it has a database to store data.

We save hundred rows a day in the database.

What happend in this case with the ROM?

is it going to crash?

what happend if we store out database in SD card? the problem is solved?

re: More Persistent Storage Stuff part 2

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re: More Persistent Storage Stuff part 2

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