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JAC

Joined: 24 Jul 2005 Posts: 3469
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Posted: Sun Oct 21, 2007 7:40 am Post subject: Compact Flash OS |
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The thread about whats under your hood reminded me of something I saw a while back. That was running your pc off a compact flash card - usnig an IDE - Compact Flash adaptor. Has anyone tried this?
http://www.ehomeupgrade.com/forums/showthread.php?t=425 |
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Cpuswe

Joined: 15 Mar 2005 Posts: 2214 Location: Karlskrona, Sweden
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Posted: Sun Oct 21, 2007 8:00 am Post subject: |
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I have a colleague at work running two 4 Gb Compact Flash cards as a boot disk on his HTPC. Very silent but perhaps not as fast since the adapters only supports PIO and not DMA. Adapters supporting DMA is comming available or already has. _________________ My collection: http://www.cpucollection.se :::::: http://www.chipdb.org Photos of chips you never knew existed. Now over 6000 different chips in the database. |
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JoelTheGeek
Joined: 13 Oct 2007 Posts: 14
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Posted: Sun Oct 21, 2007 10:51 am Post subject: |
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| I've been toying with the idea of picking one up & running TrixBox off of it. I have a TrixBox PBX running now, but since it's not too active then the hard drive barely does a thing except chew up hydro. |
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Marcin

Joined: 02 Jan 2005 Posts: 8519 Location: Poland
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Posted: Sun Oct 21, 2007 10:57 am Post subject: |
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Flash memory have much smaller limit of read-write operations than standard HDD. That means it will damage much faster and you will loss (I hope not) important data. I didn't try it ... _________________ Visit ABC CPU - Virtual CPU Museum. |
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Cpuswe

Joined: 15 Mar 2005 Posts: 2214 Location: Karlskrona, Sweden
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Posted: Sun Oct 21, 2007 12:02 pm Post subject: |
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True, they are not for storing important data but as a boot disk i would say its perfect. Cheap,cool and silent. _________________ My collection: http://www.cpucollection.se :::::: http://www.chipdb.org Photos of chips you never knew existed. Now over 6000 different chips in the database. |
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D.8080

Joined: 03 Apr 2006 Posts: 1474 Location: Italy
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Posted: Sun Oct 21, 2007 12:08 pm Post subject: |
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Sounds cool, flash for boot is perfect, but no emuleing.
Anyone tried the ram disk?
If I'm not wrong some epia motherboards have a built in flash slot. |
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Marcin

Joined: 02 Jan 2005 Posts: 8519 Location: Poland
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Posted: Sun Oct 21, 2007 12:23 pm Post subject: |
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Most of motherboards have boot option : Removable or USB HDD (different names in BIOS but same function) and you can use any pendrive as boot disk IDE connector is faster than USB 2.0 standard but we are using same slow flash memory.
Anyway very good idea. I like unusual items like adapters  _________________ Visit ABC CPU - Virtual CPU Museum. |
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doccybrown

Joined: 03 Oct 2005 Posts: 1736 Location: Germany
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Posted: Sun Oct 21, 2007 12:31 pm Post subject: |
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My Amiga 600 with integrated IDE-interface
is already loading the OS from a CF-card.
Veeeeery fast, desktop is available in a few seconds!
Also a big advantage is that the flashcards
aren`t huffy like harddisks if dropped....  _________________ Ordem e Progresso |
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D.8080

Joined: 03 Apr 2006 Posts: 1474 Location: Italy
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Posted: Sun Oct 21, 2007 12:49 pm Post subject: |
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| You can tell! |
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doccybrown

Joined: 03 Oct 2005 Posts: 1736 Location: Germany
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Posted: Sun Oct 21, 2007 1:15 pm Post subject: |
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Many newer small client workstations
already using cf-cards as boot device
by default. Newer cards are
delivering more than 10MB/s...
at a few times lower random access time
in comparison with a harddisk! _________________ Ordem e Progresso |
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doccybrown

Joined: 03 Oct 2005 Posts: 1736 Location: Germany
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Posted: Sun Oct 21, 2007 1:25 pm Post subject: |
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Not to forget the low power consumption of
cf-cards. I think they are very cool for laptops,
low power consumption and shock resistant. _________________ Ordem e Progresso |
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D.8080

Joined: 03 Apr 2006 Posts: 1474 Location: Italy
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Posted: Sun Oct 21, 2007 1:53 pm Post subject: |
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When I look back to 5 years ago...
Now all this is normal stuff. |
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doccybrown

Joined: 03 Oct 2005 Posts: 1736 Location: Germany
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Posted: Sun Oct 21, 2007 2:08 pm Post subject: |
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I guess first flash-devices appeared
about ten years ago so you are
right this is old stuff. But meanwhile they are
improved in capacity, speed and durability.
So HDs are getting more and more serious
competition by CF-cards and SSDs! _________________ Ordem e Progresso |
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wepwawet

Joined: 18 Mar 2004 Posts: 3019 Location: Seligenstadt - Germany
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Posted: Sun Oct 21, 2007 3:33 pm Post subject: |
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five years ago...
hm.
I remember me building a fli4l ISDN firewall/router out of a Siemens 5l PC, a very small pc that worked wirhout any fan and had a power consumption of 17 W without a hard disk.
I had anything ready, OS on a diskette and wanted to use a flash memory instead (that machine was known as a diskette melter - those low 17 W were enough to melt down a diskette within some weeks when the machine was turned on all the time and the diskete wasn't removed:-).
As I didn't find the right controller card, firewall software begun to be reliable on the workstation and the DLS discussion started i left that project.
... maybe worth start thinking again. why not? _________________ You may use the photos I have posted here under CC BY-NC-SA license. |
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Wizzard1

Joined: 05 Nov 2006 Posts: 930 Location: Boston MA USA
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Posted: Sun Oct 21, 2007 5:16 pm Post subject: |
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| OS on a flash-disk are preferable when lightweight/low-power/durability are a preference- I have 2 laptops running on flash (one CF and the other ISE-flash) and they boot Win98se extremely quicky... I would not recommend them for XP, unless you have >1GB RAM as the pagefile would need to be OFF. |
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