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0
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1answer
65 views

Link Aggregation with 3 switches

I am new in networking. Sorry for my ignorance. I have three switches. Switch 1 has 4 ports. Two of them connected to switch 2. And the other two ports are connected to switch 3. All these four ...
1
vote
1answer
45 views

kpartx device to image mapping

I am using kpartx to map the paritions of an image file to device mapper. kpartx maps the image to one of the free loop devices, for example, /dev/loop0 Is there a way to query what image is mapped ...
2
votes
1answer
2k views

Loop back mount a VMDK flat image on a Linux Box

I am trying to loop mount a VMDK flat image generated by VMware fusion. The VMDK file has the -flat extension. I am trying to use kpartx kpartx -av /path/to /my/vmdk but I get llseek error ...
0
votes
1answer
169 views

nfs, mounted loop devices

I'm usign a Debian server (Jessie) as an NFS server. All exported NFS-shares are mounted filesystems using loop devices. They are mounted in the fstab without any special options & the mountpoints ...
3
votes
2answers
2k views

loopback device in a Linux container?

I'm attempting to use a loopback device inside a container, to mount some image file: > sudo losetup /dev/loop0 test.img losetup: /dev/loop0: failed to set up loop device: No such file or ...
0
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1answer
274 views

Loop device going into Readonly Mode

We are using a network Samba drive for Backup on our Linux Server. In order to store permissions (Samba does not support this), we have created a loop device to a large file (50GB) on the network ...
2
votes
1answer
894 views

Find out which loop device is behind a dev mapper blcok device

I'm using cryptsetup with loopback devices. I'm looking for a way, given a device mapping, to identify which loopback device is used by this device. i.e. get /dev/loop1 as a result of an operation on ...
-1
votes
1answer
93 views

Storage virtual machine. LVM or loop devices? [closed]

Actual situation: I'm the administrator of a virtual machine. The virtual machine is a Debian. This machine will be mainly a storage machine with different services (svn, ftp... ), and a webserver. ...
0
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1answer
662 views

poor performance with vmdk mounted as loop device even after conversion to raw

Edit 13/12/12 - At this stage it would appear to be related to Western Digital (and possibly others) Advanced Format 4K block sizes. This link goes some way into describing the issue, however the ...
3
votes
1answer
2k views

Cannot read device /dev/loop0

I'm trying to create a crypted drive on my loop0 device. For this command /sbin/cryptsetup create cryptedDrive /dev/loop0 I'm getting the following error Cannot read device /dev/loop0 Here's ...
3
votes
1answer
136 views

Why make random file for loopback device for encrypted file system?

I have read a few tutorials on setting up an encrypted file system using cryptsetup. They all start with the following creation of a random file dd if=/dev/urandom of=/etc/cryptfile bs=1M count=10 ...
1
vote
1answer
799 views

Why does this loopback device creation malfunction?

The stackoverflow people thought this was more appropriate here, I put it there as it is part of a program but I can see their POV, so here it is: At the bottom of the code you can see it failing. In ...