[SOLVED] Is Windows Readycache a persistent cache?

[1405]

Does Readyboost flush the cache upon exiting W10, or is the data still available the next time I turn on my computer?

 

[USAFRet]

AFAIK, it is not persistent.

What drives do you have involved in this?

 

[1405]

I don't. I'm asking for a friend. He has a PC with a small SSD and a huge HDD. He was wondering if he got this 64GB flash drive Newegg has on sale for $6.99... if it would cache his HDD so his games (on HDD) would load quicker next time he turned on his PC.

 

[Colif]

readyboost adds to ram, not storage

it stores superfetch, which is sort of storage but its normally in ram, not on a drive.

Is ReadyBoost still an effective tool in Windows 10? | TechRepublic

ReadyBoost has been around since the days of Windows Vista. Here's a look at how it works, how to take advantage of it, and when you should forgo it.

www.techrepublic.com

the superfetch cache is also tiny so it might not make a great difference to his ssd.
If he wants more space he better off with a bigger ssd.

i bought 3 USB 3.1 USB flash drives earlier today, 1 x 256 & 2 x 32gb, 300mb/s tfr speed. they weren't that cheap.

 

[hotaru.hino]

I don't. I'm asking for a friend. He has a PC with a small SSD and a huge HDD. He was wondering if he got this 64GB flash drive Newegg has on sale for $6.99... if it would cache his HDD so his games (on HDD) would load quicker next time he turned on his PC.

ReadyBoost only affects the OS components. User applications like games won't get counted.

If your friend wants faster load times, get an SSD. Even a 1TB SATA SSD is relatively affordable these days.

 

[1405]

Thanks. I'll tell him what you guys said.
But that makes me wonder... why cache fast RAM with a slow flash drive?

 

[Colif]

if anything it will slow him down, as moving the cache off an ssd that can run at up to 550mb per second, to a USB that is running at... that USB tfr rate is 80mb/s. Thats one way to slow things down.
I wonder how it works out if its worth even using it?

 

[USAFRet]

if anything it will slow him down, as moving the cache off an ssd that can run at up to 550mb per second, to a USB that is running at... that USB tfr rate is 80mb/s. Thats one way to slow things down.
I wonder how it works out if its worth even using it?

In the depths of time before actual solid state drives, it might have been considered 'useful'.
As in "it can be done, but why bother'.

Like the various vids we used to see about making a RAID 0 out of 4/6/8 flash drives in a USB hub.
Yes, it can be done. But WHY?

 

[Colif]

readyboost made sense when PC's had 500mb of ram and you could get a USB to add more. I used to use it long ago, but once PC has 16gb of ram its hardly useful.

think it exists now to be used with Optane

 

[Fireside92]

readyboost made sense when PC's had 500mb of ram and you could get a USB to add more. I used to use it long ago, but once PC has 16gb of ram its hardly useful.

think it exists now to be used with Optane

I’m sorry but this just isn’t true. It was originally intended to aid with small ram sizes but it also can drastically help load times even with large amounts of ram. Once superfetch information leaves ram, which even with 16gb will happen often enough, it goes back to the hdd. With readyboost on a small ssd or a usb drive (assuming it’s a usb drive with faster r/w than an hdd) it will instead store the superfetch on said device, resulting in a faster response the next time that data is needed.

It has a few extra steps but the end result is similar to how something like primocache would work. This is a super condensed idea of how it works, but it’s more accurate than saying it increases ram.

 

[Deleted member 14196]

Super fetch is also useless on SSDs as well as ready boost completely useless garbage

 

[Fireside92]

Super fetch is also useless on SSDs as well as ready boost completely useless garbage

I think windows has it disabled by default on ssds, not sure though. But if all you have is a spinning platter and a super tiny ssd readyboost can be awesome. It doesn’t have to use an sd card or usb drive, it can use a real ssd. Can result in some decent speed gains, though obviously just running off an ssd is much better.

Unfortunately I came here looking for the same info as op, and I haven’t been able to find an answer. From what I can tell no, it’s not persistent. I think it is lost every time the pc shuts down or restarts. If anyone has better info please feel free to correct me.

 

[hotaru.hino]

Unfortunately I came here looking for the same info as op, and I haven’t been able to find an answer. From what I can tell no, it’s not persistent. I think it is lost every time the pc shuts down or restarts. If anyone has better info please feel free to correct me.

ReadyBoost is a component of SuperFetch, which is supposed to help with boot times and/or application loading performance. Given that, if it's not persistent, what's the point?

 

[Fireside92]

ReadyBoost is a component of SuperFetch, which is supposed to help with boot times and/or application loading performance. Given that, if it's not persistent, what's the point?

That’s what I thought! What little info I found on the internet suggested it isn’t persistent. If it is it could be a useful little tool.

If it’s not persistent the only use case I could see is a pc that’s on 24/7. Seems obvious to me it should be persistent but if I’ve learned anything over the years it’s that being an obvious function doesn’t make it a given function in windows. Microsoft has done some dumb things.