A permanent data storage device used for storing and retrieving digital information using rapidly rotating discs (platters) coated with magnetic material in a rigid form factor (as opposed to floppy disks).

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Geting error “Must specify either driver or file” using physical disk in QEMU

I want to install windows 10 64 bit but my current verson of windows is 32 bit so it is unable to run the setup.exe file so I booted into live ubuntu 14.10 64 bit and installed qemu to use my current ...
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Is it safe to use the -y and -Y flags to hdparm?

Is it dangerous to use the -y or -Y flag in hdparm during a write, or when the disk is still mounted, or will hdparm refuse to spin-down, or automatically sync and unmount?
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how does hdparm calculate spin-down times?

I have been trying various options with hdparm, like setting the spin-down time to 5 minutes withhdparm -S 60 and setting the APM to 1, but I end up getting a spin-down in less than 5 seconds... How ...
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How to prevent automatic external hard-drive unmount

I am running some simulations in Matlab on a Linux machine (running Debian Gnome v3.4.2). All the scripts and heavy .mat files are in an external 1TB Toshiba hard-drive connected through USB 3.0 to ...
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freebsd10 disc cloning

I have a FreeBSD 10.1 computer whose disc is failing. I've tried to use Clonezilla, and dd with no results.My syntax with dd was dd if=/dev/hda of=/dev/hdb bs=1M (I used dd on systemrescue). The ...
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How to properly mount new hdd, to free up the old one

I installed a new hdd /dev/sdb1, and mounted to /home/ubuntu/new1, and moved some files there to free up the old hdd, but when I do du -h new1 is still takes space in the old hdd, below are my fstab ...
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46 views

How can I mount a drive under my home directory at boot?

In my current setup, I have a RAID0 array of 2x3TB HDDs with btrfs, two partitions: / /home Under the /home directory, there are two users, both admin, one of which is myself. So far, this setup ...
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56 views

/dev/disk/by-id creating wrong symlinks for harddrive

I'm running into an interesting problem where on reboots and power cycles, my harddrives will occasionally be given the wrong symlink in /dev/disk/by-id. For example, when I issue ls /dev/disk/by-id I ...
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1answer
19 views

1kb partition: is it a problem, can it be removed?

I have a 1KB partition on my drive, sda4. Here is the output of lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 698.7G 0 disk ├─sda1 8:1 0 500M 0 part /boot ├─sda2 8:2 ...
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1answer
45 views

Transforming a disk from MBR to GPT

I have a disk with classic MBR and want to transform it to use GPT without data loss. I have seen several more or less useful tutorials, but most of them are dealing with the specific problems related ...
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Why isn't this “external” harddrive showing up?

I have an "External harddrive to USB adapter" that's giving me trouble. It shows up if I run lsusb (unrelated devices ignored): Bus 002 Device 013: ID 152d:2338 JMicron Technology Corp. / JMicron USA ...
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71 views

LVM volume corrupted, can't be mounted after reboot

I created a LVM volume using this guide I have 2x2TB HDDs for a total of 4TB (or 3.64TB usable). I created the volume and rebooted. Everything was working fine. Then I copied 1.6TB of data on the ...
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1answer
26 views

stop an external hard disk from being in group floppy

I have an external hard-disk, connected by usb. Because it is external, the /dev file for it is in group floppy. However I use it as if it is internal. I also sometimes format sd cards and other usb ...
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Hard Drive reporting all 1's after parted

So I have a 3TB hard drive /dev/sdc that I am trying to create a partition on. Before this point, I had the issues described below, I transfered the drive to a Windows 7 computer and created a GPT on ...
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2answers
191 views

Can we add home partition by adding an additional hard disk?

I have installed CentOS 6 and I have configured it as a mail server. All user data is stored in the /home directory now, but it is running out of space. By adding extra hard drive can I increase the ...
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2answers
86 views

Use MegaCLI to add a new hard disk to existing RAID0 in Linux

There are two hard disks on my machine, but after installing the operating system, it uses only one hard disk to build RAID0. After installing MegaCLI, I used: MegaCli64 -pdlist -aALL to display ...
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2answers
81 views

where is the second hard disk in my CentOS?

yesterday I installed CentOS on my machine.There are two hard disk(SCSI) in my machine,but after installing,I used "fdisk -l"command to check disks only find one disk has been mounted.I also have ...
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35 views

Debugging an external HDD

I'm using an external HDD which is my old laptop's HD with 2.5 SATA enclosure. I tried to delete a partition in Windows and stopped it unknowingly. When I reinsert it, my OS including Ubuntu freezes ...
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108 views

Is partition table type “loop” a good or bad idea on BTRFS?

I have started to convert my disks to btrfs and following tutorials, most of them created the filesystem directly on the device instead on a partition. The file system is working and stores data but ...
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1answer
54 views

Auto mount and dismount USB harddrive debian server

I've read a few articles on how to automount USB devices with usbmount. I was just wondering about the following: the documentation states that when the USB device is removed it will automatically ...
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adding encrypted /home in LVM/LUKS

I installed a new (debian) system to an SSD device. After standard install I want to mount /home on the internal HDD. To be able to ask the question, some details: On install I (manually) generated ...
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28 views

4k mode hard disk partition

I am trying to create a 256 MB primary partition for my 320 Gig hdd using fdisk. Since, the drive support 4k I wanted to try the emulation mode. so, for 256 Mb of 512 K blocks leads me with below ...
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52 views

Can I backup a 1TB drive onto a 750GB drive?

I want to backup a larger harddrive (1000GB), but sadly, I only have a smaller harddrive (750GB) available. In this particular case, I do not want to copy over the files, I want to backup the ...
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19 views

How do I immediately put a drive to sleep (without changing its power setting configuration)?

Within GNOME's "Disks" utility there is the option to immediately put a drive into sleep / standby, which spins down the platters. I would like to do this on my servers before pulling hot-swap drives ...
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Getting partition boundary error when using GPARTED

I am trying to allocate my hard disk with below set of partitions using GPARTED. /dev/sdb1 - 256 MB /dev/sdb2 - 2048 MB With free space preceding as (4 Mb) between partitions. After applying the ...
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53 views

Approximate partition table backup with sfdisk

I wanted to convert some logical partitions to extended ones, so I was following this accepted answer. However, at the step of backing up my current partition table, I messed up and typed the ...
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66 views

Ext3 file system became read-only and server reboots spontaneoulsy

We noticed ext3 file system in our CentOS 4.9 server became read-only. We got the following error in dmesg: EXT3-fs: INFO: recovery required on readonly filesystem. EXT3-fs: write access will ...
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66 views

Hard Drive health check

In a previous thread the answer # smartctl -a /dev/sda looks good. The problem by my side is the highly verbose output. Is possible to obtain something more human understadable, something like "hard ...
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2answers
44 views

Spanning RAID over SSD and Mechanical HD

Currently I have my root (/) directory on my ssd, and my home directory on my mechanical drive. Wanting to utilize more of the ssd and hopefully get a speed benefit, I was considering spanning across ...
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1answer
63 views

View physical location of a file/directory on a hard disk

Is there any Linux program which offers the same (or some of the) functionality of Sysinternals DiskView, especially being able to view to physical location of a file on a hard disk? DiskView URL: ...
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Does `/proc/partitions` and/or `fdisk -l /dev/sdX` provide me a reliable device size?

I have two 3TB disks, which I hope to be exactly the same size. This means that I can use dd to copy them without being short or in excess of some bytes. Therefore I tried to find out the ...
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101 views

Unable to mount location after installing Linux Mint

I have been using Ubuntu for a while, but I decided to move to Linux Mint. I removed everything and clearly installed it. After the installation there are two parts which are File System and Toshiba. ...
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89 views

How to open root directory on second HDD?

My situation is very specific. I've applied chmod -R 777 / on my CentOS 7 server, so my system screwed up on next reboot. I took server HDD home and connected it via SATA cable to my home PC. Now I've ...
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3answers
156 views

How to combine multiple HDDs into one big HDD in Linux?

I'm very new to Linux, being mainly a Windows 7 user, so I may not understand Linux-specific commands without explanation. I've decided to build a NAS running some form of Linux (probably FreeBSD or ...
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76 views

Dualboot elementaryOS & Windows 8.1 on SSD with personal files on HDD?

When I create my gaming PC I plan to dualboot Windows 8.1 with elementaryOS and my programs on an SSD. However is it possible to place my data on a HDD for both to access?
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101 views

External Hard Drive Issue on mac

After the cd /Volumes command when I type ls it shows me my hard drive name twice, with different permissions. After that when I try to use mkdir to create a directory in the external hard drive I'm ...
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2answers
874 views

How to “List Disk” in Linux

In Windows, all you have to type is "List Disk" using DisPart in a command prompt and it'll list all physical storage devices available, their size, format, etc. How do I do this in Linux?
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66 views

How to write a pattern to a device to use it with badblocks with -t test_pattern option

I recently bought a 4TB hard disk and I want to do a read-write badblocks test on this before I start using it. Since running badblocks with -w option would take ages for 4TB, I've thought to first ...
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Should I use the discard flag when configuring the filesystem to be installed over the partitions on my SSHD?

I've recently bought a laptop with an SSHD. My guess is that most SSHDs are self-optimised, so the disk itself will handle wear-levelling issues, and I won't need to add the "discard" flag when ...
2
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1answer
134 views

How to Mount a Drive with Right Filesystem?

I am trying to mount the device /dev/xvdc on my CentOS system. When I run an fdisk command I get: Device Boot Start End Blocks Id System /dev/xvda1 * 1 33 ...
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53 views

Comparing Windows and Linux machine hardware

I have to compare Linux and Windows machine hardware? In windows system, I can open the My computer properties and see the details like processors, RAM Hard disks etc. Through task manager, I can see ...
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338 views

How to install Linux Mint 17 on SSD and have Home on HDD

I have Sony Vaio VGN-NW23NE Laptop and I'm using Linux Mint as my Operating System for about two years, I've currently Qiana. I bought a new 120 GB SSD to speed up my Laptop, but I'm confused about ...
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2answers
534 views

Getting the extra GPT info; a “fdisk -l” equivalent

What is the equivalent for GPT using HDDs of: # fdisk -l /dev/hda > /mnt/sda1/hda_fdisk.info I got this from https://wiki.archlinux.org/index.php/disk_cloning (under "Create disk image") for ...
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1answer
336 views

NTFS drive not mounting in Debian

This drive has been working fine for a while, but I recall having had some slight trouble getting it mounted in the past. Anyway, it was disconnected from the machine for some time and when I ...
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32 views

How are files or chunks delimited on disk?

I'm trying to recover some lost files by grep-scanning a hard disk. (The OS is Darwin 11.4.2. The file system is HFS.) How can I determine where a file (or contiguous chunk thereof) begins and ends ...
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216 views

equivalent of `grep -a /dev/sda1` on Darwin?

I want to run something like % sudo grep -i -a 'some-string' <drive device> On Linux, <drive device> would be something like /dev/sda1. How can I find the equivalent on Darwin? (In ...
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2answers
66 views

Is reading a file on UNIX faster than writing a file?

Sorry for the sheer simplicity of this question. A rather obtuse performance bottleneck has boiled down to this very small query. I have done some empirical analysis and I think I might be getting ...
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1answer
264 views

Hard Drive Crash / Gparted Error or Something Else

Well, I had my hard drive crashed some weeks ago. My Ubuntu (14.04) automagically froze and after the moment I pressed the restart button, and it prompted me with busybox prompt. I tried booting with ...
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601 views

dd write vs read performance

I have recently done some performance tests on a new server (using dd) and wonder why read performance is so much worse than write performance? Shouldn't it be another way around? file size was in ...
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32 views

Discovering possible RAID configuration of a bunch of disks

I have a stack of 8 disks which were at one point all inside of one host. That host no longer exists, but it's been requested that I retrieve data from these disks. No one can tell me anything about ...