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Old 04-25-2009, 07:17 AM   #1
alaios
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USB persistent installation questions


Hi i have decided to open this thread about usb bootable distros. I want somehelp to understand why a peristent installation dont let u use the partition the distro is installed ? Why i should always have 2 partitions on my flash drive?

ne more thing XFCE will fit in a 2GB disk?
 
Old 04-26-2009, 04:17 AM   #2
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USB persistent installations store their filesystem in a file (and not a partition); that file (casper-rw) is later accessed when you boot into a USB session and is read as a filesystem. That's why you can't access is. You can think of it somewhat like a swap file generated during hibernation and stores a snapshot of virtual memory. So when you create a USB disk and allocate space for storing files, that space is pre-allocated.

Yes, you can definitely fit an Xfce distro on a 2 GB USB disk. Xfce is a very light desktop environment. (In fact, on a 2 GB drive you can even install GNOME / KDE distros).
 
Old 04-26-2009, 10:11 AM   #3
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You can think of it somewhat like a swap file generated during hibernation and stores a snapshot of virtual memory. So when you create a USB disk and allocate space for storing files, that space is pre-allocated.
thx for the reply.. but still how can os write changes (persistent installation) to that file?
 
Old 04-26-2009, 11:33 AM   #4
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thx for the reply.. but still how can os write changes (persistent installation) to that file?
Basically, when the OS boots up it 'sees' that casper-rw file as a complete filesystem. Sorta like a snapshot image taken and stored in case of hibernation.
 
Old 04-26-2009, 12:47 PM   #5
alaios
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So the os can still keep writing to the carsper-rw. One more question plz. I tried install xubuntu in a flash disk with a ext3 partition! Is this installation a persistent one?
 
Old 04-27-2009, 03:35 AM   #6
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I think you'll need to install Xubuntu on a FAT16 partitioned disk for any contents to be readable on Windows systems. Otherwise, yes, it will work fine.
 
Old 04-27-2009, 04:15 AM   #7
alaios
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I think you'll need to install Xubuntu on a FAT16 partitioned disk for any contents to be readable on Windows systems. Otherwise, yes, it will work fine.
I dont care too much the flash disk to be readable by windows (its a 2gb flash). The problem is that the installation didnt let me use fat 16 or fat32 fs for installation
 
Old 04-28-2009, 02:16 AM   #8
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That's odd. I've installed Ubuntu on USB disk on FAT16 partition earlier.
 
Old 04-28-2009, 06:03 AM   #9
alaios
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That's odd. I've installed Ubuntu on USB disk on FAT16 partition earlier.
I receive the message u cant install /root in fat32 (i should use ext2, or ext3 to proceed)
 
Old 04-29-2009, 02:39 AM   #10
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Yeah, you can't use FAT32. But you can use FAT16.
 
Old 04-29-2009, 01:15 PM   #11
alaios
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No unfortunately i cant. I started the installation process from xubuntu live cd and didnt let me choose fat 16. The system says that i should use something like ext2
 
  


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