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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198 views

Negative hdd usage. Available is larger than fullsize

Having issues with space accounting of lvm volume. 23G is available. But the full size of the partition is 20G. (So, it shows "-4.1G used" 0_O) > df -h Filesystem Size Used Avail Use% ...
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2answers
994 views

How to resize logical volume to fit filesystem

How can I resize logical volume to fit filesystem automagically?
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2answers
529 views

Writing data on particular sectors or blocks

Not sure if it's better suited for superuser of serverfault boards, let me know. I have a drive which I repartitioned with fdisk. Initially there was only one big partition, now there are a number ...
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1answer
2k views

VBoxManage: Error: Can't be used as the requested device

I used the soluton from this thread but always i get VirtualBox error: The medium 'lvol.vmdk' can't be used as the requested device type (0x80004005) I've tried all controllers SATA, SCSI, IDE and ...
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2answers
282 views

Any temporary fix for / being remounted as read-only?

My disk has a few bad sectors and has already failed the SMART tests. It obviously is going down. It gets remounted to read only and I have to fsck and reboot all over again. Is it safe for me to ...
3
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2answers
319 views

LVM with SSD and SATA hard disks

Is it possible to create LVM partitions for both SSD and SATA hard disks? I mean if there isn't any conflicts.
2
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1answer
969 views

How to fix hard-disk error connected by usb? [duplicate]

My system is Linux 64bit, my hard-disk is a 1TB WD HD, connected to my computer by USB3.0. I found some files cannot be copied, they are video files, and it seems I can play the video. I ran e2fsck ...
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1answer
161 views

Does symlinking from Drive A to Drive B affect I/O on Drive A?

I was wondering if IO through a symbolic link affects IO on the host drive even if it points to a seperate drive? My setup is, /dev/sdb2 1.8T 443G 1.3T 26% /home1 /dev/sda3 1.8T 1.7T ...
2
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1answer
1k views

I/O error but no bad block is reported in syslog

I got errors like this in my syslog, but there's no bad block or sector defined in kernel report, I can't just replace the HDD right now and I prefer to reallocate the bad blocks for now, so I need ...
2
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2answers
970 views

Install Linux on two hard drives

I am new to Linux. I have a machine with two hard drives, the first one has 80GB and the second has 120GB. I am about to format this machine and install Linux. I want to install all the main ...
6
votes
1answer
497 views

HDD allocation fstab

In my PC running Ubuntu 12.04 LTS I have installed three SATA hard drives. Two of them are installed near a cooler. I want to physically switch two drives (one that is not near the fan should be moved ...
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2answers
5k views

How to Throttle per process I/O to a max limit?

I'm looking for a way to limit a processes disk io to a set speed limit. Ideally the program would work similar to this: $ limitio --pid 32423 --write-limit 1M Limiting process 32423 to 1 megabyte ...
5
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1answer
205 views

Hard drive writes freezing up Gnome

I'm currently running Debian 6.0.5 on my white Macbook 2008 (4,1) and have recently noticed that when I download, move, or decompress a file, Gnome freezes up completely for at least 20 seconds. These ...
3
votes
1answer
729 views

Fedora installer doesn't see my Windows 7 partitions

I tried to install Fedora 17 on the same disk I have Windows 7. First I got the message, that there are no free space to create partition, even in Windows part of disk was marked as unallocated. I ...
2
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2answers
291 views

Find when a hard disk was first installed

What's the command in AIX to find the first time a given hard disk was installed?
0
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0answers
37 views

Recreating EXT4 partition without losing data [duplicate]

Possible Duplicate: Can't mount EXT4 hard drive after mounting it in windows I have a 2TB Western External USB harddisk. I formatted it to EXT4. one time I plugged it to a windows ...
1
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2answers
434 views

Why does e2fsck fail during boot, but not later?

When booting my Debian server, I'm presented with the following error concerning my external hard drive: /dev/disk/by-label/elements: The superblock could not be read or does not describe a correct ...
2
votes
1answer
382 views

Trapping “READ FPDMA QUEUED”

Recently I encountered a kernel message: ata3.00: exception Emask 0x0 SAct 0x1 SErr 0x0 action 0x0 ata3.00: irq_stat 0x40000008 ata3.00: failed command: READ FPDMA QUEUED ata3.00: cmd ...
2
votes
1answer
2k views

Hotplug area too small error

I have VM running under RHEL6, which is running under HyperV. It has a lot of important soft installed, but does not have suffocating workload (~10% CPU is used). It's been really unstable recently ...
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votes
3answers
749 views

Two EFI disks with Grub2

I bought two SSD disks and as usual I though that installing Windows on a completely separate disk would be the easiest solution, but I can't find any tutorials for dual booting with grub2 (efi). All ...
4
votes
1answer
381 views

Gentoo Live CD from Hard Drive: No Mountable Filesystems on root after modules loaded

I am attempting to install Gentoo on my PowerPC Mac. I have reached the point where I can boot the Live CD (I have no functional CD Drive, so it is from a spare Hard Drive), but after the kernel is ...
13
votes
5answers
8k views

How to find which process is regularly writing to disk?

How can I find which process is constantly writing to disk? I like my workstation to be close to silent and I just build a new system (P8B75-M + Core i5 3450s -- the 's' because it has a lower max ...
2
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3answers
2k views

Can't mount EXT4 hard drive after mounting it in windows

I have a 2TB Western external HDD. Its original filesystem was NTFS but I formatted it to EXT4. I had no problem in Linux; But today after I mounted it using ext2fsd in a windows box, I cant mount it ...
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1answer
1k views

Disabling readahead with hdparm or POSIX_FADV_RANDOM

From Linux kernel's doc the advice POSIX_FADV_RANDOM seems to disable readahead. But whent I disable Readhead using (sudo hdparm -A 0 /dev/sdb) I get huge degradation in performances; also noticed ...
16
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2answers
998 views

What does mv do in case of errors?

I've just tried to move a big tree from one disk to another, which was too small. Now, I'm left with something I can't really understand - it looks like some files were indeed moved away from the ...
7
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4answers
4k views

Convert image of a partition into image of a disk with partition table

I have an image of an existing partition generated with dd if=/dev/sdXN of=image.bin. Now I want to use this image as the basis for a virtual machine. I know how to convert the image into a format ...
7
votes
1answer
562 views

How to re-size virtual disk with installed Linux system?

I've got hard system configuration there and I don't want to re-install it again but I need more space now. Current system space is 30GB. Seems like it's not possible to re-size disk so what I need ...
21
votes
6answers
5k views

How do I correlate /dev/sd devices to the hardware they represent?

A drive is beginning to fail and I only know the device by its /dev/sdb device file designation. What are the ways that I can use to correlate that device file to an actual hardware device to know ...
7
votes
3answers
348 views

How do you tell what hard drive a file is on?

On Debian, I have multiple hard drives, how do I know where /var/www is? Bonus: How do I check the capacity and consumed capacity and of my drives?
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votes
5answers
5k views

How to know if /dev/sdX is a connected USB or HDD?

How can I know if /dev/sdX is a local HDD or usb key ? best doing this without root privileges. OK , udevadm helped a lot: For local HDD: udevadm info --query=all --name=sdb | grep ID_BUS E: ...
2
votes
2answers
5k views

Solaris disk failed, how to remove it?

I have a system with Solaris 10. One of the internal disks is broken: c0t0d0s2 auto:sliced rootdisk1_1 rootdg online c0t0d0s2 - c0t1d0s2 auto - ...
3
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1answer
86 views

Encryption of home directory for securing data after harddisk corruption

Always when I install Linux OS (e.g. Ubuntu), there is a possibility to encrypt the home directory. I was asking myself why is this useful. Is it good in the case when my harddrive is corrupted and I ...
3
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4answers
3k views

From df device name to physical drive name (vendor / type)

Seeing the device name by df, is it somehow possible to resolve it to the physical drive name such as vendor / type. /dev/sda3 915.4G 34.9G 880.0G 4% /share/HDA_DATA /dev/sdd3 ...
13
votes
1answer
2k views

Is disabling barriers for ext4 safe on a laptop with battery?

The manual page says about the barrier option for ext4: Write barriers enforce proper on-disk ordering of journal commits, making volatile disk write caches safe to use, at some performance ...
2
votes
2answers
553 views

How to increase the timer before drive spins-down?

I use Ubuntu 12 beta on a Lenovo Z575. I noticed that the disk spins down a few seconds after the last operation. When I am working, e.g. in the vim and write quite often, it spins-up and -down ...
2
votes
2answers
747 views

stopping harddisk spin-down on Asus EEE 1015PX (and other eee's as well)

I have an Asus EEE 1015PX netbook. It runs Linux (debian) without any powersavings enabled. E.g. no harddisk idle/spin-down tooling is running. Now constantly the harddisk spins down after it has been ...
1
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2answers
888 views

RedHat Linux Space Usage Problem

I recently downloaded something on my Redhat Linux computer, and it told me I was out of space. I checked my disk usage, and it says I've used 100% of my folder, but as you can see I still have almost ...
1
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4answers
149 views

Erasing HDD , re-write only headers , is that safe?

I want to erase my HDD quickly with dd, so If I only "zeroify" the partition headers , like destroy the inode table, block size etc. But is that safe? UPDATE I have some partition not encrypted ...
5
votes
2answers
1k views

How to create a snapshot of a physical disk?

I have Windows 7 installed on one of my disks. I want to boot this Windows system in my Xen HVM, but I do not want the changes to be permanent. So I want to create a snapshot of my Windows 7 ...
2
votes
2answers
576 views

Partitioning Ubuntu and Windows 7 once and for all

I am dual-booting Windows 7 and Ubuntu (installed with wubi). So far there have been no problems, but now it says the disk is out of space all the time (I think that is because /dev/loop0 is used 100% ...
3
votes
4answers
3k views

What is the concept of Drives in Unix Systems?

In windows, we have C drives where all the softwares are installed and other partitions e.g; D, E etc to store our data. Now once we reinstall the windows for some reason, we install everything again ...
21
votes
3answers
723 views

How can I limit the output speed of stdout?

I'm running CentOS 5.7 and I have a backup utility that has the option of dumping its backup file to stdout. The backup file is rather large (multiple gigabytes). The target is an SSHFS filesystem. To ...
4
votes
1answer
2k views

What's faster, dd 1.5TB or rsync 500GB?

I need to save data from a failing hard drive. Sounds like ddrescue or myrescue (or maybe clonezilla?) will be my best friends here, but I'm just wondering what will likely be faster: using ...
2
votes
2answers
176 views

Why is my /home separate from /?

I was confused why I was getting out of space errors so I ran df and saw this: [me@fedlap /]$ df -h Filesystem Size Used Avail Use% Mounted on rootfs 43G ...
3
votes
2answers
1k views

How to disable clicking in Seagate ST3000DM001?

Recently I bought this disk and I cannot get rid of funny clicking -- funny because normally not configured disk make dry click. This one make click like a sweet chirp. But besides this, this click ...
2
votes
2answers
1k views

vmstat IO stats: why the high bo during a download?

On my RHEL 4 machine, I was downloading a huge file (2.5GB)..I was checking the output of vmstat and was especially curious about seeing the disk IO using bi and bo. I know iostat is a better tool ...
3
votes
3answers
1k views

Copying an HDD to a larger one by dd

I'm trying to copy an entire HDD which has IBM PC-style partition table to a larger one by dd on GNU/Linux. The questions are: Can I use the additional space on the larger disk by changing the ...
3
votes
5answers
3k views

GNU/Linux (Debian): detecting hard-disks mappings?

Let's suppose you have two hard-disks: one internal (boots GNU/Linux); one external (USB). "fdisk -l" detects both, but will not tell you which is /dev/sda and which is /dev/sdb. "lsusb" will tell ...
3
votes
2answers
8k views

How extend linux partition with?(after success to extend : fail to boot computer)

I have Ubuntu and I want to enlarge the disk space of /dev/sda1 from 10GB to 90GB. gparted Ubuntu 9.04 live cd show: Partition File System Size /dev/sda1 ext4 10GB /dev/sda2 ...
1
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2answers
552 views

Is “Disk failure is imminent” causing the errors I am experiencing?

I am getting SMART Status 184 end to end error, and "Disk failure is imminent", suggesting I need to get a new hard drive, and I will do. But now I am also getting error messages such as when running ...