Rodolfo Medina <[EMAIL PROTECTED]> writes: >>> I do my daily backup with the following command: >>> >>> $ rsync -vr --delete Mail News /mnt/sda >>> >>> (where `sda' is the pendrive), and I've calculated that in my new Debian >>> Etch system the process is about 10 times slower than it was in Sarge! >>> It is the same with both my desktop PC and my laptop. In /etc/fstab I >>> have the following entry: >>> >>> /dev/sda /mnt/sda vfat sync,rw,user,noauto 0 0 >>> >>> . The backup that would take only a few minutes now takes almost one >>> hour! Can anybody please explain this strange phenomena?
Sven Joachim <[EMAIL PROTECTED]> writes: >> IIRC it's an issue with vfat file systems and the "sync" mount option in >> 2.6 kernels. I noticed the same phenomenon when I switched from 2.4 to >> 2.6; >> the solution is not to use the "sync" option, that also increases >> your drive's lifetime. Rodolfo: > I put the `sync' option just to avoid drive corruption. If it is > necessary to toggle it off, how can I be sure the process is terminated > before I unmount the drive? "Nelson Castillo" <[EMAIL PROTECTED]> writes: > This was discussed sometime ago in this list (someone wanted to > be able to remove the USB drive anytime). Using sync is not a good > idea with the USB pendrive. > > Check this thread: > > http://marc.info/?t=117925038400003&r=1&w=2 Sven Joachim <[EMAIL PROTECTED]> writes: >> You may want to add "sync" as the last command in >> your backup script do avoid data loss. "Nelson Castillo" <[EMAIL PROTECTED]> writes: > You use the same rsync command. You execute sync _after_ > the rsync command. "Douglas A. Tutty" <[EMAIL PROTECTED]> writes: > Why issue a 'sync' instead of just unmounting and waiting until the > thing stops flashing? Ken Irving <[EMAIL PROTECTED]> writes: > sync blocks, so you can tell from the command line when the job is done. > I guess this thread took a turn to USB drives, which would presumably > be local, but the rsync operation might be on a remote system where the > lights aren't visible. For that matter, umount also blocks... I often > use sync before umount, but I suppose it's not really necessary. Thanks to all for your help. I put off the `sync' option from my /etc/fstab. Douglas, my pendrive never stops flashing as long as it is inserted in the usb location: he must be in love with the PC. So I'm going to run the `sync' command after the backup and wait until the prompt returns back. Then I will unmount the drive. Will it this way be really _safe_? I.e., am I sure that the copy is finished when the `sync' command turns the prompt back? Thanks, Rodolfo -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
