[xubuntu-users] Peculiarities with copying large files to a flash drive, Xubuntu 12.04
quantamcore at gmail.com
Wed Jun 13 05:11:38 UTC 2012
Right and how exactly do you intend to push a 4.4 GB file on FAT. I think
the best bet would be to split the file into 2 parts and compress each
using something like 7-zip.
On 12 June 2012 14:41, Greg Zeng <gregzeng at gmail.com> wrote:
> NTFS-3G, NTFS-Vista, NTFS- Win7 ... are each three very different &
> incompatible products. Wikipedia yourself on this. When you force a
> hostile file format onto flash memory (like NTFSxx) - it has, as you
> discovered, unpredictable resulmatts.
> All flash-drive-only specialized apps suggest formats FAT16 or FAT32.
> Flash drives are electronic gadgets very different to magnetic
> drives. I think this is your "error".
> On 6/12/12, Pasi Lallinaho <pasi at shimmerproject.org> wrote:
> > Forwarding this mail to xubuntu-users, which is appropriate.
> > Pasi
> > On 06/11/2012 10:00 PM, Len E. wrote:
> >> (The situation described herein may be of interest
> >> to the development team).
> >> A large .iso file (Debian 6.0.5 DVD), 4.4GB size, which
> >> had been downloaded from the Debian website was copied
> >> to an 8GB flash drive formatted as NTFS. The checksum,
> >> using MD5calc from the terminal command line, matched
> >> with the posted value on the website, both for the
> >> downloaded file, and the file copy on the flash drive.
> >> When the flash drive was mounted on a Vista PC (which
> >> has the DVD burner), the checksum value calculated there,
> >> both on the flash drive and on the file copied to the
> >> Vista hard disk did not match the posted value.
> >> What was most unusual, was that when the flash drive
> >> was remounted onto the Xubuntu machine, the checksum
> >> value no longer matched the posted value, even though
> >> no further write operations to the flash drive had
> >> occurred.
> >> This process was repeated a few times, alternately
> >> using the cp terminal command, and a copy/paste operation
> >> to transfer the .iso file to the flash drive.
> >> (Between attempts, the flash drive was reformatted to NTFS
> >> using Gparted on Xubuntu). The peculiar results were
> >> the same with each attempt.
> >> The final attempt was to put the .iso file into a tar
> >> archive on Xubuntu, then cp the archive onto the flash
> >> drive. On Vista, the 7zip utility was used to extract the
> >> .iso from the tar archive.
> >> The checksum for the extracted .iso file DID MATCH THE
> >> POSTED ORIGINAL VALUE !!
> >> I don't really understand what is happening, but I'm
> >> pleased to have a work-around using the tar archive if
> >> I have similar large-file transfer requirements in the
> >> future.
> >> For your consideration .....
> > --
> > Pasi Lallinaho (knome) » http://open.knome.fi/
> > Leader of Shimmer Project and Xubuntu » http://shimmerproject.org/
> > Graphic artist, webdesigner, Ubuntu member » http://xubuntu.org/
> > --
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