I went and fdisk'd a USB disk and put the Fat32 filesystem onto it. Then I thought I ran dosfsck over it which I thort formatted the disk - apparently not. Then I copied a bunch of files and directories to it. Now I am unable to recover the files and data. In the rare instances when I perform a sloppy mount I see directories named 001, 002, 003 and 004. These directories variously contain files named 001, 002, 004 (no 003) etc.
Fdisk gives me:
I don't know enough to use dd, kpartx, parted, partmon, partprobe, partx et al
I just tried to burn an ISO to a CD-R in K3B, and it finished with the message "written data in track 1 differs from original." I get that a lot; until now, I blamed it on my failing CD drives . What can I do to avoid it besides burning at a slow speed? I know that, having heard years ago that I should burn at 4x; but my new DVD-RW burner's slowest writing speed is 16x. (I'm annoyed at that. It was a Christmas gift, and I didn't think of specifying a write speed. I wouldn't be surprised if new CD drives can't burn at such a slow speed, though.)
If I had an unformatted Acer Aspire One netbook, could I install Linux linux from a flash drive or along those lines? Keep in mind, I don't actually have the computer yet, so I haven't tried. I also do not have that much experience with Linux, or unformatted computers..
I know there's a command to display the live amounts of data being written and read to the disk.Like, it tells you how many blocks have been read/written so far to a device
im installing ubuntu and after I reach the partioning portion there's a prompt that says "before you select a new partition size, any previous changes have to be written to disk. you cannot undo this operation.Please note that the resize operation may take a long time.
Go Back Continue
after i click continue there's a prompt again saying "too small size" ok
then after i click ok it will go back to the partioning portion again.
im dual booting xp and ubuntu and there's a 30 gb on my drive C 16.4G is still unused.
I am trying to access a Magneto Optical disk written under OS/2 hpfs filesystem. I cannot locate a dang thing about support of CentOS for OS/2. I found a module for Linux OS/2 support that dated back to 1993, have no idea how to compile it, used alien to create an RPM package, said compiled succesfully, still can't mount the drive (/dev/sdb) with filesystem type -t hpfs. Can anyone out there help me, or does CentOS just not do this?
I've got a CentOS 5.4 box and the following disks connected: # parted /dev/sda print Model: ATA WDC WD1600BEKT-0 (scsi) Disk /dev/sda: 160GB Sector size (logical/physical): 512B/512B Partition Table: msdos
Number Start End Size Type File system Flags 1 32.3kB 107MB 107MB primary ext3 boot 2 107MB 160GB 160GB primary lvm
# parted /dev/sdb print Model: ATA WDC WD1200BEVT-0 (scsi) Disk /dev/sdb: 120GB Sector size (logical/physical): 512B/512B Partition Table: msdos
Number Start End Size Type File system Flags 1 32.3kB 107MB 107MB primary ext3 boot 2 107MB 120GB 120GB primary ext3 lvm the OS, data and programs are on /dev/sda.
I'd like to copy the full directories and files to the newly added /dev/sdb wich has, as you can see, less space. Also note that /dev/sda has only about 3.6Gigs uses, so it will no doubt easily go into /dev/sdb. How can I do the full copy, and yet make /dev/sdb bootable just like /dev/sda (just as if it was cloned by Ghost)? I've checked dd, but AFAIK, it needs that both source and target devices be the same in size.
My hard disk is failing and I amnot able to boot into the system! Currently I have logged into the system uing Live CD! Any way to compress and back up the data in my hard disk in an efficient way!
Suppose I have a 80 GB hard disk (sda) with 4GB of contents. Using a dd to copy to a different disk
Code: dd if=/dev/sda of=/dev/sdb copies all the contents (including free space). So sdb also needs to be 80GB.
You will notice that in VMWare or VirtualBox disk images, it is possible to set the disk to use only the amount of space of actual data. So a 80GB virtualbox/vmware image with 4GB of contents will be 4GB.
Is it possible to do that with an actual hard disk (sda) image? I want to create an image of an actual hard disk, copy it to DVD and transport it (in mail) for restoration on another computer (having same hard disk).
I'm trying to help out a Windows Vista user by rescuing their data from a failing hard disk. When their laptop stopped booting, I immediately pulled the disk to get as much as I could off of it using another Windows box, but the process took days and ultimately choked on multiple bad sectors and stopped responding. I then hooked it up to my Ubuntu box via a USB disk dock and ran a ddrescue on the Windows partition. The operation took a week, then seemed to get stuck for another week on the "splitting failed blocks" phase. So I have an dd image and a log to go back to, but when I resume that process it still seems to use the disk and I don't see much progress.
I then tried a plain `dd` on the disk with `conv=noerror,sync` options, and that has been running for a few days now, but with input/ouput error messages every few seconds and seemingly no records going in or out. I think that's a bad sign.What's the best, and fastest, way to get the most data off the disk as possible and into an image file, and then perform any necessary operations on the image file so that the disk is no longer needed (since it seems to be just about dead)? Er, just realized I'd put "Windows 7" in the post title, but this is a Vista partition, and I can't change the title. They're pretty similar, with one OS being much less useful than the other, but I thought I'd better acknowledge my mistake.
I have a PC with OpenSuse 11.1. Beside root there are two other users on the system. Now I have installed a new PC with OpenSuse 11.2. Only one user is set up until now. I installed the hard disk from OpenSuse 11.1 into the new PC on IDE Primary Slave, because I wanted to copy some files from the old system. OpenSuse 11.2 has mounted the old disk automatically in /media/disk and /media/disk-1. The problem is that I can't find any files or directories from the users. I could find only one file from root in /media/disk-1/root/Desktop. Why can't I see the files? Does it have anything to do with UID or SUID?
Is it possible to mount a 2nd hard disk without erasing the data that is already on it? If so, what command must I enter. The system recognizes that the disk is there, I just can't access the data because it hasn't been mounted.
It would seem that my cds/dvds that I've created under Microsoft vista home premium can't be read/written on (formatted as data disks. Is there a program to be downloaded or an app, that would allow me to read, download or add data to these dcs/dvds. Using ubuntu-10.10 and debian.
I have 2 hard disks and all together I created 6 partion in it.On primary I installed Windows XP and REST 5 partions were having data.From Second hard disk ,I copied all the first partion data to another partions and installed Red Hat 7.It took only 3 GB all togethr for Linux Distribution.Now I need to fetch my Windows data back.I logged from the Windows XP disk and I could see the second disk through disk managemnt .But it was showing "Unhelathy".But I will not be able to retrive the data.So can Anyone give soln for this.
There is a disk 500 gb, it is broken on /boot and on /root and on /dev/sda1 and /dev/sda2. Whether prompt it is possible to redistribute a disk without loss of data namely it is necessary to make/boot and two equivalent on disk volume.
So the other day I plugged my iPod shuffle into my pc while booted into Ubuntu. I couldn't access it through rhythmbox, o I mistakenly figured the best thing to do would be to format it with the fat system. Big mistake. ended up turning out an error saying something along the lines of not being able to format the iPod in a 32 bit format.Now my iPod doesn't show up at all, and I have no clue where to go from here to get it formatted and set up for use with rhythmbox
I am using an embedded platform in which I have connected an external harddisk (/dev/sda). The SCSI driver is present and I am using the SG_IO interface for performing the SMART commands with the Hard Disk. (Unfortunately not all the HDIO ioclts are present. So I opted for the SG_IO ioctl). But the data transfer (reading/write data from/to sector) is not working with the SG_IO ioctls. So I searched for some other options. Later in one of the places, I found that we can actually mount the /dev/sda to some mount point in /mnt and then make a XFS file system (mkfs.xfs) of this.
And then we can create the directories and do file operations on this mounted directory. Here the simple read/write systems calls can be used for this. I was thinking about this implementation. But I am confused how I can map the actual LBA (Logical Block Address) to the device file offset. I mean if I want to write to the sector 5, there will be a LBA for it. So I can do lseek on my device and then write the data there. So how the mapping between LBA and device file offset can be calculated.
I want to ensure I have done all I can to configure a system's disks for serious database use. The three areas I know of (any others?) to be concerned about are: I/O size: The database engine and disk's native size should either match, or the database's native I/O size should be a multiple of the disk's native I/O size. DMA: Disks that are capable of Direct Memory Access (eg. IDE) should be configured for it. Write-caching: When a disk says it has written data persistently, it must be so! No keeping it in cache and lying about it.
I have been looking for information on how to ensure these are so for CentOS and Ubuntu, but can't seem to find anything at all. I want to be able to check these things and change them if needed. The actual hardware involved is very modest. The point is to get the most out of what hardware we do have, even though it's "not very serious hardware" from a broader perspective.
So I have a system that is about 6 years old running Redhat 7.2 that is supporting a very old app that cannot be replaced at the moment. The jbod has 7 Raid1 arrays in it, 6 of which are for database storage and another for the OS storage. We've recently run into some bad slowdowns and drive failures causing nearly a week in downtime. Apparently none of the people involved, including the so-called hardware experts could really shed any light on the matter. Out of curiosity I ran iostat one day for a while and saw numbers similar to below:
[Code]...
Some of these kinda weird me out, especially the disk utilization and the corresponding low data transfer. I'm not a disk IO expert so if there are any gurus out there willing to help explain what it is I'm seeing here. As a side note, the system is back up and running it just runs sluggish and neither the database folks nor the hardware guys can make heads or tails of it. Ive sent them the same graphs from iostat but so far no response.
Just ran into an uncomfortable problem. I usually never save any documents on my machine, and keep all my stuff on an external USB hard disk. (an 80GB TrekStor DS microdisk q.u) Well yesterday this disk just would not mount. Read through related posts but nothing seemed to work. Even tried it on a Windows machine.
Tried TestDisk utility. Found nothing wrong with the drive, but still could not repair the MBR.log code...
Palimpsest Utility recognized the drive, but just will not let me do anything with it except format it.
How can i repair the partitions and MBR without losing all my data?
I was attempting to get crontab to kick off a daily job, but the job wont start. I opened /var/log/messages and noticed all the logs were from 6 months ago. I cleared the log and then did a tail -f so I could watch it for activity. I then hit my box with anunsuccessful log in attempt. Nothing happened to the log. The uptime of my box is 22 days and the logs that were in it before I cleared it were from months ago.Is there a daemon I can check or another file I can mod to get logs writing again?
I need to filter the log from a massive wget. I want to remove the progress lines and only leave the last one. Now each progress line starts with a newline '
I don know how this happened, but my system only recognizes an disk when the disk is blank. If thereś anything on it it won mount it. Why is this happening?
After installing Windows 7, the GRUB got re-written by the windows bootloader. Now after booting into the live cd and mounting /boot partition (sda2), I tried to reinstall the GRUB with this command grub-install --root-directory=/mnt /dev/sda as told by this [URL]
But I got the an error which says, Are you sure /dev is mounted? then i tried the same command on the / partition (sda5) which said, cannot find boot directory, Are you sure /dev is mounted?
And installation failed, now after restarting its just a black screen with grub> prompt.
