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Managing Linux Filesystems
Rank and File
SSHFS for Remote Filesystems
Mounting a filesystem locally via SSH is not rocket science with sshfs. You don't even need root privileges because it is a Filesystem in Userspace. As shown in Listing 3, a call to sshfs is sufficient to mount the /home/tktest directory locally on server 192.168.56.105. You can work with the target directory as with any other normal directory, even though it is on the remote server.
Listing 3
Mount /home/tktest Directory
$ sshfs tktest@192.168.56.105:/home/tktest ./sshdir/ tktest@192.168.56.105's password: $ cat /proc/mounts | grep ssh tktest@192.168.56.105:/home/tktest /home/user/tmp/sshdir fuse.sshfs rw,nosuid,nodev,relatime,user_id=1000,group_id=1000 0 0
Conclusion
As an alternative to the simple block devices featured so far, you can create stackable block devices that offer additional features, such as the Logical Volume Manager (LVM) already discussed, software RAID (MD/RAID), a distributed replicated block device (DRBD), or device mapper targets.
Infos
- Understanding ext4 extents: http://digital-forensics.sans.org/blog/2010/12/20/digital-forensics-understanding-ext4-part-1-extents
- Kernel.org ext4 documentation: https://www.kernel.org/doc/Documentation/filesystems/ext4.txt
- The Mail Archive – ext4: fix data corruption caused by unwritten and delayed extents: https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg886512.html
- ext4 data loss: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/317781/comments/45
- ATA trim: https://en.wikipedia.org/wiki/Trim_(computing)
- Cyclic redundancy check: https://en.wikipedia.org/wiki/Cyclic_redundancy_check
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