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--- linux:filesystems:crypto_raid [2016/03/30 08:44]
tkilla
+++ linux:filesystems:crypto_raid [2016/06/20 22:22] (current)
tkilla [CryptFile]
@@ Line 248: / Line 248: @@
   * http://linuxgazette.net/140/pfeiffer.html
   * http://www.saout.de/tikiwiki/tiki-index.php
-  *
+  * https://thesimplecomputer.info/full-disk-encryption-with-ubuntu
@@ Line 257: / Line 259: @@
 create a file full of random data, setup loop device, luksFormat & format
-  dd if=/dev/urandom of=testfile bs=1M count=3900    #=MB
+  dd if=/dev/urandom of=/cryptfile bs=1M count=3900    #=MB
-  losetup /dev/loop32 cryptfile
+  losetup /dev/loop32 /cryptfile
   cryptsetup luksFormat /dev/loop32
   cryptsetup luksOpen /dev/loop32 cryptfs
   mkfs.ext4 -L homecrypt /dev/mapper/cryptfs
+===== btrfs on top of luks =====
+Create a crypto partition as described above, then format the opened crypto container filesystem:
+  mkfs.btrfs /dev/mapper/<cryptname>
+  # recommended options for rotational discs (for ssds set 'sdd' option):
+  mount -o noatime,compress=lzo,noauto,autodefrag /dev/mapper/<cryptname> /<mountpoint>
+===== Recommended options for installing on a pendrive, a SD card or a slow SSD drive =====
+/dev/sdaX / btrfs x-systemd.device-timeout=0,noatime,compress=lzo,commit=0,ssd_spread,autodefrag 0 0
+* https://wiki.debian.org/Btrfs

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