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