thegeezer <thegee...@thegeezer.net> [14-06-24 17:16]: > On 06/24/2014 03:43 PM, meino.cra...@gmx.de wrote: > > Hi, > > > > I bought two identical external harddrives, USB 3.0, with 1 TByte each > > (no SSD - the good ole mechanical ones...;). > > > > The intended use is for backup of longer files. The drives will > > contain the same contents. > > > > Currently there are still "clean metal" (no partitioning, no fs). > > > > Data integrity and recoverability (Uhhh...that words looks wrong...) in > > case of an desaster is more important than speed. > > > > What is the recommended way of partitioning ? > > What filesystem to choose? > > > > > > Thank you very much in advance for any help! > > Best regards, > > mcc > > > > > > PS: Running vanilla kernel 3.15.1.... > > > > > > > > > > I do this using hard links and rsync to only copy changed data. > this creates a dated folder structure that i can then rsync / cp using a > livecd to baremetal and basically allows best recoverability, imho. > so long as the filesystem supports hard links you are golden. > you might want btrfs for this for long term storage to help in case of > bitrot, but rsync should refresh the file if it is suddenly unreadable > (meaning any other hard lnked versoins are also up the swanny) > ymmv depending on what it is you are backing up > > #!/bin/bash > echo 'preparing..' > date=`date "+%Y-%m-%d_%H.%M.%S"` > workingfolder="/mnt/usb/backupsyncs/myhost1" > fromfolder="root@myhost1:/* --exclude=/var/tmp --exclude=/dev > --exclude=/mnt --exclude=/opt --exclude=/proc --exclude=/sys > --exclude=/usr/portage --exclude=/usr/src" > > echo "Date " $date > echo "From " $fromfolder > echo "To " $workingfolder > > echo "move current to be dated" > mv $workingfolder/current $workingfolder/backup-$date > > echo "now syncing into dated folder" > rsync -vz --partial --modify-window 5 -W --delete -a $fromfolder > $workingfolder/backup-$date > > echo "cleaning up..linkcopying dated folder to <current>" > cp -al $workingfolder/backup-$date $workingfolder/current > > >
Hi, thank you for your reply! :) ...I am sure, whether I want btrfs. On the net I found for example this: http://www.phoronix.com/scan.php?page=news_item&px=MTY1MDU with sentences like: "The Btrfs file-system changes for the Linux 3.15 kernel mostly deal with bug fixes and performance fixes while some corruption fixes are also expected to come." ...sounds a little different to "stable" I think... What do you think?
