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Chat => Entertainment & Technology => Topic started by: DEViANCE on February 17, 2007, 22:34:09 PM

Title: flash memory speed?
Post by: DEViANCE on February 17, 2007, 22:34:09 PM
is flash memory, CF and SD in particular, faster than a ATA133 hdd?

just thinking about getting a 2gb one to bootwindows off then having a 500gb external disk for everything else.
Title: flash memory speed?
Post by: Binary Shadow on February 17, 2007, 22:57:38 PM
2gb gonna be enuff? id want at least 8 lol
Title: flash memory speed?
Post by: DEViANCE on February 17, 2007, 23:51:06 PM
Quote from: Binary Shadow2gb gonna be enuff? id want at least 8 lol

just for xp pro? for page file an stuff?
Title: Re:flash memory speed?
Post by: Serious on February 18, 2007, 00:04:50 AM
My Windows (XP) folder is 3.46GB! :shock:

7dayshop have cheap 4GB compact flash cards.
Title: Re:flash memory speed?
Post by: Beaker on February 18, 2007, 00:05:57 AM
Possibly, though im sure the actual data throughput of a HDD is better than that of a flash drive.  
Title: Re:flash memory speed?
Post by: funkychicken9000 on February 18, 2007, 10:30:15 AM
Easy test, try loading a 300mb file of each and seeing which is faster.  Im willing to bet that the minute anything tries to write to the flash card, itll start performing like a dog
Title: Re:flash memory speed?
Post by: Mongoose on February 18, 2007, 16:56:41 PM
no, not by a long way

cheap flash memory manages about 2-4 MB/s, Sandisk ultra and extreme cards manage about 10-13 deppending on the reader.
Title: Re:flash memory speed?
Post by: Chuck Norris on February 19, 2007, 16:51:15 PM
I bought a kingston 2gb stick hoping to put windows on it, then I found out how slow it was and wished I had spent more getting a better one.
Title: flash memory speed?
Post by: bear on February 19, 2007, 17:04:41 PM
Flash on converter to IDE should be fast but  stick to USB is not so good I think
Title: Re:flash memory speed?
Post by: mrt on February 19, 2007, 17:38:49 PM
Sorry for asking a possibly stupid question, but why would you want to?  Its not like a Mac operating system where you can just take it round your mates house to boot up?  Different hardware will mean it does not boot?  or am I missing the point.  When i read this at first, I thought ... ace, what a cool idea, but then my second thought was what I would use it for.  Please explain, am quite intrigued.
Title: flash memory speed?
Post by: Leon on February 19, 2007, 17:57:01 PM
If it ran faster than a HDD then speed booting and running of windows... but as it looks like its slower there isnt much unless you are making a mini PC and cant do with the space of a 3.5" drive
Title: Re:flash memory speed?
Post by: Mongoose on February 19, 2007, 18:11:04 PM
Only reason I can think of would be noise on a DHCP server/router/firewall box which was to be on 24/7

If I set up my smoothwall again I shall swap out its clapped out and very loud 512MB HDD for a similar size CF card on a converter. twil be very nearly silent then
Title: Re:flash memory speed?
Post by: Chuck Norris on February 19, 2007, 19:59:55 PM
I just wanted to do it.  There was no other reason.
Title: Re:flash memory speed?
Post by: Eggtastico on February 19, 2007, 20:05:58 PM
Quote from: Chuck NorrisI just wanted to do it.  There was no other reason.

Nope. Ive looked into it in the past. Tried booting Linux of CF using an IDE adapter & using a HDD as a media drive.
Title: Re:flash memory speed?
Post by: Mongoose on February 19, 2007, 21:01:17 PM
Quote from: Chuck NorrisI just wanted to do it.  There was no other reason.

at the end of the day, what other reason do you need  :D
Title: flash memory speed?
Post by: knighty on February 19, 2007, 21:28:05 PM
Ive looked at the idea in the past and it is faster for booting windows etc...

virtually 0 seek time etc....

actual throughput might be down a little on large files, but whatd the chance your going to be copying large fiels on and off your 4gig... plus, would you really notice the tiny difference anyway ?

iirc. booting from a flash card connected up to an IDE port will get you booted up and into windows in under 14sec.   (thats windows fully loaded and waiting for you... not just the backgroeund and start menu ready etc...)
Title: Re:flash memory speed?
Post by: Mongoose on February 20, 2007, 00:26:14 AM
mmm Im skeptical, even if your seek time really was 0 it would still only save you ~8-12ms per file. Youd have to access 100 files to save yourself a second, and youre going to loose some of that by going from 30+Mb/s to 10 or less transfer rate.
Title: Re:flash memory speed?
Post by: Serious on February 20, 2007, 00:45:38 AM
Depends, they might be fragmented in which case a single file can need many seeks. Windows goes through a lot of files at start up so it might make a difference. You also have to consider speed of transfer into the equation.
Title: flash memory speed?
Post by: knighty on February 20, 2007, 05:03:30 AM
^^^ thats exactly it, theres no spin up time, practically 0 seak time etc. etc.