Server Fault Stack Exchange
Server Fault Stack Exchange

Questions tagged [raw-disk]

30 questions
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does KVM raw images support preallocation?

I was trying to create a raw image with this command: qemu-img create -f raw -o size=200G,preallocation=metadata file.img but seem that it raw images doesn't support preallocation. if so why there is raw + preallocation in this chart? # qemu-img…
Zim3r
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Write an image to an external hard disk in Windows 7

As you may already know, Windows Vista SP2 and up (includes Windows 7) block raw disk write access. Is there a way, short of patching the kernel, to override that block? So in cygwin I can do e.g. cat ./myfile>/dev/sdc3 Is there a Windows freeware…
unixman83
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Virtualbox and raw disk problem

I'm trying to use a raw disk in virtualbox, following this guide. Anyhow I get an error: mamluck@mamluck:~/VirtualBox VMs/disks$ VBoxManage internalcommands createrawvmdk -filename /home/mamluck/VirtualBoxVMs/disks/disk1.vmdk -rawdisk…
Mascarpone
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Mapping raw storage devices to VMs in XenServer 5.6?

In VMware ESXi, we can easily present a raw SATA hard drive to a virtual machine through Raw device mapping. Is it possible in the free edition of XenServer 5.6?
netvope
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How to determine disk image file format: VMDK, VHD or raw file format?

Is there any shell command using which I can determine the format of a disk image file? I want to check that disk image file is in which of these formats: vmdk, vhd of raw file.
Abhay Gupta
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Is there a way to enable direct i/o in virtualbox when connecting to a raw disk in linux?

I found instructions on how to create a virtual disk for use with virtualbox that points to a raw block device. You can't do it from the ui, but you can do it from the command line: VBoxManage internalcommands createrawvmdk -filename…
Stu
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KVM raw disk has comparable write, slow read

I first ran fio tests, and apparently my write speed is basically 90%, but my read speed is 40%. Here is my xml file: /usr/bin/qemu-system-x86_64
itisyeetimetoday
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How to create a raw device as a file in the filesystem?

I have heard there is a way to create a file in a filesystem which will can be configured as a raw device? Does anyone know the commands for doing that?
Ron Watkins
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Trying to understand the discrepancies in disk usage inside raw images and on host disk usage

As the title states, I am trying to understand the discrepancies from ncdu and/or du in terms of what I am observing from disk usage. From what I understand, on modern systems, there is difference between disk usage and apparent size.…
horace
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VMware ESXi RDM Shared Disk and Multipathing

I have set up a RAW mapped storage device which is shared between 3 VMs. In the guest OSs the disk shows up fine but when I try to set up multipathing I can only see one path. In the virtual machine properties when I select the new (raw mapped lun)…
Cobra Kai Dojo
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Server 2008 Volume Shadow Copy fails, "Type of the filesystem is RAW"

Problem machine is Windows Server 2008 R2 file server with the following drives, all NTFS: C: OS D: File shares E: DFSR staging folders, temp files, and Volume Shadow Copies The D: drive is configured to place volume shadow copies on E:, and the…
ryandenki
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How to configure VirtualBox server for performance at home

I currently have two physical Ubuntu Server 10.10 servers at home: one serves as our firewall/router/DHCP/VPN server and the other performs double-duty as a file server and a VirtualBox host for an Ubuntu Desktop 10.10 machine which I use from…
Gnosian
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Open/Mount XEN image formatted using NTFS

I've created XEN image with dd some time ago. The image is formatted using the NTFS How it is possible to mount this image from Linux or Windows? Thank You very much!
Daniil Harik
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How to convert my hard disk PartitionStyle from GPT back to RAW in Windows 10

For testing purposes, I need my hard drive on Windows 10 machine to be in a RAW partition style format. It is currently in the GPT partition style. The hard drive is a secondary hard drive and does not contain any system files or boot files, it is…
Devstr
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Disk image growing in size

I am trying to set up Rasberry pi for jobs that don't deserve bigger machine. I downloaded a Pidora disk image (.img) zipped it is roughly 512MB. After unzipping it is 2.2GB ( no problem here). After I try to write it to an SD card with sudo dd…
sgp667
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