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Salut prieteni, in acest tutorial vreau sa va prezint o functie care ne ajuta sa imbunatatim performanta computerului cu ajutorul unui simplu stick USB, tehnologia aceasta se numeste ReadyBoost si poate fi intalnita pe windows vista si windows 7.
ReadyBoost poate ajuta foarte mult calculatoarele cu memorie putina si hard disk-uri slabe, daca aveti SSD pe sistem, nu are rost sa incercati ReadyBoost, nu o sa functioneze, deasemenea ReadyBoost nu functioneaza pe windows xp, aceasta este o functie introdusa odata cu lansarea Windows Vista in 2006, pe windows 7 a fost mult imbunatatita, si pentru vista lucrurile s-au imbunatatit odata cu introducerea SP1, acest service pack repara unele bug-uri din ReadyBoost, mai exact pe windows vista (fara SP1), in momentul intrari computerului in sleep apar problemele, mai precis problemele apar la iesirea din sleep, acum nu mai sunt probleme cu ReadyBoost pe vista, in orice caz daca inca aveti un windows vista fara SP1 macar, va sfatuiesc sa luati masuri, se gasesc pe site-ul microsoft la download si SP1 si SP2.
Pe windows 7 ReadyBoost functioneaza impecabil, cei cu mamorie RAM putina vor simti diferenta cel mai bine.
Trebuie sa va spun ca nu orice stick va functiona cu ReadyBoost, stick-urile mai vechi probabil nu vor functiona datorita performantelor slabe, daca cumparati acum un stick usb de pe piata sunt sanse mari sa achizitionati unul “ReadyBoost ready”.
Principiul pe care se bazeaza ReadyBoost l-am explicat in tutorial, tocmai de aceea va invit sa-l urmariti, tot in acest tutorial video despre ReadyBoost v-am spus si ce stick-uri sa cumparati ca sa va mearga la sigur, acele doua stick-uri le-am testat si functioneaza 100% cu rezultate bune.
Puteti consulta textul de mai jos pentru eventuale nelamuriri, sunt cateva intrabari la care un membru marcant al team-ului microsoft raspunde pe blogul personal, citatul este luat de pe Tom Archer’s blog, Tom Archer este senior MVP (Most Valuable Professional), o voce foarte avizata din cadrul echipei Microsoft:

Citat de pe Tom Archer’s blog
Daca nu intelegeti engleza puteti vizita acest link, pagina este tradusa prin google translate

Q: What perf do you need on your device?
A: 2.5MB/sec throughput for 4K random reads and 1.75MB/sec throughput for 512K random writes

Q: My device says 12MB/sec (or 133x or something else) on the package but windows says that it isn’t fast enough to use as a ReadyBoost device… why?
A: Two possible reasons:

1. The numbers measure sequential performance and we measure random. We’ve seen devices that have great sequential perf, but horrible random
2. The performance isn’t consistantly fast across the entire device. Some devices have 128M of lightning fast flash and the rest of the device is really slow. This is fine for some applications but not ReadyBoost.

Q: What’s the largest amount of flash that I can use for ReadyBoost?
A: You can use up to 4GB of flash for ReadyBoost (which turns out to be 8GB of cache w/ the compression)

Q: Why can’t I use more than 4GB of flash?
A: The FAT32 filesystem limits our ReadyBoost.sfcache file to 4GB

Q: What’s the smallest ReadyBoost cache that I can use
A: The smallest cache is 256MB (well, 250 after formatting). Post beta2, we may drop it another 10 MB or so.

Q: Ok… 256M-4GB is a pretty big range… any recommendations?
A: Yes. We recommend a 1:1 ratio of flash to system memory at the low end and as high as 2.5:1 flash to system memory. Higher than that and you won’t see much benefit.

Q: Isn’t this just putting the paging file onto a flash disk?
A: Not really – the file is still backed on disk. This is a cache – if the data is not found in the ReadyBoost cache, we fall back to the HDD.

Q: Aren’t Hard Disks faster than flash? My HDD has 80MB/sec throughput.
A: Hard drives are great for large sequential I/O. For those situations, ReadyBoost gets out of the way. We concentrate on improving the performance of small, random I/Os, like paging to and from disk.

Q: What happens when you remove the drive?
A: When a surprise remove event occurs and we can’t find the drive, we fall back to disk. Again, all pages on the device are backed by a page on disk. No exceptions. This isn’t a separate page file store, but rather a cache to speed up access to frequently used data.

Q: Isn’t user data on a removable device a security risk?
A: This was one of our first concerns and to mitigate this risk, we use AES-128 to encrypt everything that we write to the device.

Q: Won’t this wear out the drive?
A: Nope. We’re aware of the lifecycle issues with flash drives and are smart about how and when we do our writes to the device. Our research shows that we will get at least 10+ years out of flash devices that we support.

Q: Can use use multiple devices for EMDs?
A: Nope. We’ve limited Vista to one ReadyBoost per machine

Q: Why just one device?
A: Time and quality. Since this is the first revision of the feature, we decided to focus on making the single device exceptional, without the difficulties of managing multiple caches. We like the idea, though, and it’s under consideration for future versions.

Q: Do you support SD/CF/memory stick/MMC/etc.?
A: Mostly. In beta2, we added support for a small number of SD/CF cards on internal USB2 & PCIe busses. RC1 has a much broader support range.

Q: Why don’t you support SD on my USB2.0 external card reader?
A: We unfortunately don’t support external card readers – there were some technical hurdles that we didn’t have time to address. In general, if a card reader shows a drive without media in it (like a floppy drive or CD ROM does), we can’t use it for ReadyBoost.

Q: Will it support all USB drives, regardless of how they are ID’d to the OS (“hard disk drive” or “Device with Removable Storage”)?
A: We have no way to tell what is on the other end of a USB cable so we do some basic size checks (since no one has a 200GB flash device 😉 ) and then perform our speed tests. HDD will not, however, pass our speed tests, and there is no benefit to using a USB HDD for ReadyBoost.

Q: Can you use an mp3 player to speed up your system?
A: Not currently. MP3 players use the ‘plays for sure’ interfaces to expose themselves to Windows. We require that the device appear as a disk volume. These aren’t currently compatible.

Q: How much of a speed increase are we talking about?
A: Well, that depends. On average, a RANDOM 4K read from flash is about 10x faster than from HDD. Now, how does that translate to end-user perf? Under memory pressure and heavy disk activity, the system is much more responsive; on a 4GB machine with few applications running, the ReadyBoost effect is much less noticable.

Q: I can’t get my device to work with ReadyBoost… can I lower the perf requirements?
A: Unfortunately, no. We’ve set the perf requirements to the lowest possible throughput that still makes your system faster. If we lowered the perf requirements, then there wouldn’t be a noticeable benefit to using ReadyBoost. Remember, we’re not adding memory, we’re improving disk access.

Q: Which manufacturers support ReadyBoost?
A: Well, I hope that all of them do, eventually. Right now, we’re working with manufacturers to create a program that will allow them to identify ReadyBoost capable devices on their packaging.

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de Cismaru Cristian