Timings for copying 1434 files from an SDHC card to a hdd and from the hdd to the SDHC using two different adapters follow. A is the mount point for the SDHC-USB adapter. Backup is a directory on the hdd. File sizes range from 0 to 51.5 MiB.
AtoBackup is approximately 16 times faster using the second adapter compared to the first. BackuptoA is more than three times faster using the second adapter compared to the first. One USB socket was used for all tests. http://carnot.yi.org/SdhcUsbAdapters.html Regards, ... Peter E. ========================= $ grep Ato .bashrc AtoBackup() { cp -vauf /home/peter/A/* /home/peter/Backup; } $ grep toA .bashrc BackuptoA() { cp -vauf /home/peter/Backup/* /home/peter/MY; } $ # http://www.ebay.ca/itm/111153740723 $ # with 4 GB SDHC, mounted at A. $ ls -1 A | wc -l 1434 $ du -s A 721056 A $ Backup is a directory on the hdd. $ rm Backup/* $ time AtoBackup [output omitted] real 7m46.016s user 0m0.196s sys 0m2.824s $ rm A/* $ time BackuptoA [output omitted] real 8m53.698s user 0m0.276s sys 0m2.208s $ ls -1 A | wc -l 1434 $ du -s A 721056 A $ # http://www.ebay.ca/itm/231081576986 $ # with same 4 GB SDHC, mounted at A. $ rm Backup/* $ time AtoBackup [output omitted] real 0m24.459s user 0m0.120s sys 0m2.600s $ ls -1 Backup | wc -l 1434 $ du -s Backup 407504 Backup $ rm A/* $ time BackuptoA [output omitted] real 2m24.244s user 0m0.164s sys 0m2.308s $ ls -1 A | wc -l 1434 $ du -s A 721056 A ========================= -- 123456789 123456789 123456789 123456789 123456789 123456789 123456789 12 Tel +13606390202 Bcc: peasthope at shaw.ca http://carnot.yi.org/ -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/E1Voxhd-00025I-CY@dalton.invalid
