Fedora :: Accessing Newly Formatted Disk (JFS Filesystem)

May 9, 2010

I have just formatted an external USB disk with a JFS filesystem. The partition shows up in 'Computer', and it mounts, but if I try and copy and files onto it, it will not do it. Clearly, Nautilus is mounting it read-only. How do I get this to behave like my USB Flash drive, where I plug it in, and its automatically mounted read/write?

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General :: How To Do Clean Install Onto A Newly Formatted Drive

Jan 25, 2011

How to do a clean install onto a newly formatted drive

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Ubuntu :: Cannot Mount Newly Created LUKS Filesystem

Jun 24, 2011

I just created a LUKS filesystem following these instructions. Everything seemed okay at first. It mounted with no problem and I moved some files there. I then unmounted it and remounted it to see if I would need to use a special command. It mounted right away and even allowed access to normal users. So, I rebooted to see if anything would change. Before I go on I should say that my partitioning scheme is weird. Not knowing any better I 'upgraded' to 11.04 when my update manager told me a new version was out. This didn't go well and I had to do a fresh install to put 10.10 back on my machine. After this the way it partitions the drive has been weird. What I had was /dev/sda1 which has my installation on it including /home. But, where it gets weird is /dev/sda2 would not manually mount. Looking at the disk in gparted it showed /dev/sda2 THEN under that, as if they were sub partitions or something, I had sda6 and sda7. I had been using 6 and 7 for various things and they mounted fine, so I decided to encrypt 7. After reboot I only have sda1. Everything else shows up as unallocated and ever way I try to mount I get device does not exist.

I only did the procedure for sda7 but 6 has been affected as well. There is no longer a sda2 the way there was before. This always bothered me anyway since I wanted sda2 for my /home but it wanted to call it sda6 and put it under sda2 like I said, I could never fix that, now this.

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Fedora :: Requires Root Password When Accessing Second Windows Hard Disk?

Aug 28, 2010

I have a second hard disk which has windows and C and D drives partitions. When I boot fedora 13, fedora automatically mounts them as 53 Gb Filessytem and 200 GB Filessytem. But when i try to browse to these filesystem, fedora ask me root password. How I can configure fedora so that it does not ask me root password and this change should be permanent ( surving computer shutdown and restart) ? I want these windows partitions to be reachable by me as the non-root user.Also given /dev/sdb (the windows disk) what is the command line to find out the filesytem path to which various paritions on /dev/sdb are mapped to?

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Fedora :: Disk Missing In /home Filesystem?

May 29, 2011

why my df -h command is telling me I'm missing 18G?

***
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_aikifedora-lv_home
357G 272M 339G 1% /home
***

This was 'df -h /home' straight after a fresh install. It says it's 357G in size, but even though 272M is in use, it's telling me I have only 339G left available. Where did that extra 18G go?

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Ubuntu :: How Can I Detect If Disk Is Formatted As Gpt Or Mbr

Apr 29, 2011

How can i detect if my disk is formatted as gpt or mbr?I suppose in principle this could be done by somehow reading a few bytes (no more than say 10K) from the beginning and possibly the end of the disk? But there surely is a program around that does exactly this, maybe some variation of or argument to fdisk or grub?

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Hardware :: USB DISK Formatted Ext4 Not Working?

Feb 2, 2011

I formatted a 500GB with ext4 format, and placed in a usb box, it showed up, but could not write, copy past etc to it, the same disk was formatted in NTFS, and FAT32 showed up and could do all the above actions, given that ext4/ext4/ext2 are specifically made for Linux, then why on earth they don't get mounted automatically and work normally from usb box and ports?

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CentOS 5 Hardware :: Can't Mount HFS+ Formatted Disk?

Jun 13, 2010

I've been at this for a few hours now. Searched the forums and while I found many similar topics, none were quite the same. The most obvious difference to me is this line: Jun 12 15:43:05 G1093 kernel: sdc: unknown partition table

Running CentOS 5.4
Installed hfsutils-3.2.6-7.2.2
[root@G1093 ~]# modprobe hfsplus

[code]....

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Ubuntu :: Accessing Local Filesystem Kills Program

Sep 16, 2010

I searched online, but I was unable to find anything on this. I recently tried to install a program, but it did not work. After that, anytime I would open a folder that is located on the local computer, it would close out of Nautilus. I thought that was the extent of the problem, but I just discovered that if I click "Open" on any program, it closes that program out. I was able to plug in a jumpdrive and browse the files on it, but as soon as I clicked on a folder that was local, it would kill the program. I am using 8.10, by the way.

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OpenSUSE :: Unable To Access DISK DRIVES...NEWLY INSTALLED OS?

Sep 17, 2010

I have installed SUSE yesterday.Everything has been fine except two.1. I can't access my hard disk drives. It says it need to install online some software for it but it can't.I am attaching a screen shot of the error I encounter.2. I have Ubuntu installed in another disk drive but in the Grub menu there in no option to boot to Ubuntu OS.How should I change the text in 'menu.lst' to solve the problem?

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Ubuntu :: Lost A Reiser Formatted Disk It Is Not Visible Not With Df Or Fdisk?

Jan 5, 2010

within the last 24 hours I have lost a reiser formatted disk. It is not visible not with df or fdisk.Which tools do you normally use in a situation like that.

Disk /dev/sda: 40.0 Gb, 40020664320 byte
255 heads, 63 sectors/track, 4865 cylinders
Units = cylindre of 16065 * 512 = 8225280 bytes

[code]....

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Ubuntu :: Disk Formatted In Error - Boot Sector Repair

Nov 20, 2010

I was using the disk utility on Ubuntu 10.04 and wanted to make by 500GB external NTFS formatted USB drive into 1 x 50GB FAT32 and 1 x 450GB NTFS. I clicked the option that said format or create a partition and it basically wiped the whole thing in a split second leaving me with 500GB of seemingly empty space. Obviously the files are still there but I cannot boot the drive to view anything. I have downloaded testdisk, but don't know how to use it, but I am sure there is a relatively simple solution here. I am currently repairing the boot sector of the drive as Test Disk showed the drive as "no type" i.e. not FAT/NTFS/ext4 etc., but shows the correct amount of used space though, but I cannot view anything err go, I cannot use the undelete command as yet.

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Ubuntu :: Find Out Which Was The Original Installation Version That First Installed After Formatted The Disk

Sep 12, 2010

I have been upgrading Ubuntu as its new distributions are released every six months regularly since quite some time now. Is there a way I can find out which was the original installation version that I first installed after I formatted my disk. I mean as far as I remember I have been using this state of my Ubuntu since 8.04 and have been upgrading since then, but I am not sure.

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Ubuntu :: Drive Formatted - Mount Partition For Disk Data Recovery

Nov 1, 2010

I accidentally formatted a 2TB drive of mine (big oops), but have recovered 2 of the 3 partitions using testdisk. My third partition is a LUKS encrypted partition. Testdisk managed to recover a piece of it, but it won't mount as most of it is unallocated. The partition originally occupied all space from sector 2,930,272,065 to the end of the disk -- sector 3,907,024,064. That is about 473 GBs. Currently, the partition only uses space from sector 2,930,272,065 to 2,930,288,129, about 7.84 MB.

The rest of the space is unallocated. Now what I need to do, is to expand the partition so that it occupies all the space that it used to. How would I do this? I cannot resize the partition, cause it would try to recreate the filesystem AFAIK and I don't want that, as it will fry my data. My data is not terribly important, but I would rather have it then not. I attached a screenie of kpartitionmanager. The partition in question is /dev/sdb2.

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Software :: Imaging Hard Drives - Gparted To Resize The Newly Imaged Disk Accordingly

May 26, 2011

The problem is every forum I read pretty much ends up with someone suggesting DD, everyone agreeing and the threads dead-end. This is not a good solution for real world large scale usage which is what I'm trying to do. At least it doesn't appear to be unless there is some switch I have misinterpreted when invoking the command. The problem I have with it is it's super bloated and god awful slow. It tries to write out the entire partition or set of partitions (based on the choice I have made) reguardless of if any of the space had been empty, and lets say the partition I copied from was 80 GB and I copy it to a 160 GB disk/partition... I am left with an 80 GB partition and 80 GB unused space and a need to use another tool such as Gparted to resize the newly imaged disk accordingly.

Right now what I use is Norton Ghost and it can do the job I need in only a couple minutes instead of a couple hours and it sizes the partition to max size all at once. I do not want to use this program tho... The fact is in order to make ghost run at a usable speed I have to use it's Windows and not its DOS version which leaves me using something like BartPE and... that's worse than using Windows ME. Surely someone out there has noticed this is a problem and developed a better program that can at least run on par with Ghost.

why I was hoping for a Linux solution it's because I would like to use a "one stop shop" disk, so to speak, where I can boot into a small linux distro such as Puppy and have a full suite at my disposal rather than booting with one disk, wiping, rebooting with another disk, ghosting then testing everything. I suppose if anyone knows of a distro that can already do all that including a good ghost alternative already packaged I would love that.

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Red Hat / Fedora :: Filesystem Check After Power Outage - WARNING: "Running E2fsck On A Mounted Filesystem May Cause SEVERE Filesystem Damage"

May 18, 2011

I am very new to linux, and I have a question regarding the filesystem check (fsck). The power recently went out and when I tried to restart linux the following error appears:

*/dev/sda1 contains file system w/errors, check forced it then goes on to say..

*An error occured during the file system check. Dropping you to a shell; the system will reboot when you leave the shell. Give root password for maintenance (or type Control-D to continue) I wasn't sure what to do, but checked some other online forums and they suggested running fsck manually - so I typed in the root password - and used the command, "fsck -A -V ; echo == $? ==" it then gave the following message

*WARNING!!! Running e2fsck on a mounted filesystem may cause SEVERE filesystem damage
*Would you like to continue (y/n)

Again, I wasn't sure what to do so i just checked no. I then manually turned off the computer and was prompted at the beginning to press Alt-3. I was brought to another screen and it informed me one of the drives was degraded and suggested rebuilding the array. I tried doing this, but it still brings me back to the original error of, "/dev/sda1 contains file system w/errors, check forced," and the process continues.

Also, when I tried to rebuild the array, I didn't backup any of the data on our home directory before doing this (which was probably a big mistake). After being prompted to type the root password, I was able to give the ls command and look at all the directories...the home directory where our data was stored was empty and I am afraid I may have lost some information. Is there a possibility that data was lost when I was trying to rebuild using the old drives?

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General :: Accessing The Hard Disk Using The /dev/sda Interface?

Mar 25, 2010

I am developing a program which can access the SATA-hard disk. I have to use the /dev/sda interface for accessing the hard disk. What are all the commands i can use to perform the sector read, write (Both DMA and PIO), sending the smart commands etc. Or is there any easier way?

I saw that i can make use of hdparm call for getting some of the attributes.

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Ubuntu Multimedia :: Rhythmbox: Accessing Disk Every Few Seconds While Playing?

May 18, 2010

I'm running Lucid and have an annoying problem with Rhythmbox: while playing, it constantly accesses the disk, every 2-3 seconds drrrrd drrrrd. Listening to some silent music is horrible - the output of the speakers is lower than the noise of the local disk.

Maybe relevant settings in Edit->Preferences:
Playback -> Network Buffer Size: 1024 kB
Music -> Watch my library for new files: off

Is there anything else one can change? It can't be that difficult to read a <10MB file into memory right from the start and not touch the disk drrrrd every few seconds?! P.S. I verified by turning off the speakers and start/stop playback - the noise there on playback and not if turned off. Reliably.

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General :: Method To Find Time For Accessing A Block From Disk?

Nov 23, 2010

Is there any way to find the time required for accessing a block
from disk?

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General :: Hard Disk Data Transfer Accessing Error

Jun 28, 2010

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.

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General :: Extend The Lvm And The Filesystem To The Second Disk?

Dec 18, 2010

I've added a second drive to a system and I need to extend the lvm and the filesystem to the second disk. Is there a way to do this online with centos 5.5? I specifically need extending the actual ext3 filesystem which seems to be the trick part.

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General :: Filesystem With Inodes Close On The Disk?

Jan 9, 2011

I'd like to make the ls -laR /media/myfs on Linux as fast as possible. I'll have 1 million files on the filesystem, 2TB of total file size, and some directories containing as much as 10000 files. Which filesystem should I use and how should I configure it?As far as I understand, the reason why ls -laR is slow because it has to stat(2) each inode (i.e. 1 million stat(2)s), and since inodes are distributed randomly on the disk, each stat(2) needs one disk seek.Here are some solutions I had in mind, none of which I am satisfied with:Create the filesystem on an SSD, because the seek operations on SSDs are fast. This wouldn't work, because a 2TB SSD doesn't exist, or it's prohibitively expensive.

Create a filesystem which spans on two block devices: an SSD and a disk; the disk contains file data, and the SSD contains all the metadata (including directory entries, inodes and POSIX extended attributes). Is there a filesystem which supports this? Would it survive a system crash (power outage)?Use find /media/myfs on ext2, ext3 or ext4, instead of ls -laR /media/myfs, because the former can the advantage of the d_type field (see in the getdents(2) man page), so it doesn't have to stat. Unfortunately, this doesn't meet my requirements, because I need all file sizes as well, which find /media/myfs doesn't print.Use a filesystem, such as VFAT, which stores inodes in the directory entries. I'd love this one, but VFAT is not reliable and flexible enough for me, and I don't know of any other filesystem which does that. Do you? Of course, storing inodes in the directory entries wouldn't work for files with a link count more than 1, but that's not a problem since I have only a few dozen such files in my use case.

Adjust some settings in /proc or sysctl so that inodes are locked to system memory forever. This would not speed up the first ls -laR /media/myfs, but it would make all subsequent invocations amazingly fast. How can I do this? I don't like this idea, because it doesn't speed up the first invocation, which currently takes 30 minutes. Also I'd like to lock the POSIX extended attributes in memory as well. What do I have to do for that?Use a filesystem which has an online defragmentation tool, which can be instructed to relocate inodes to the the beginning of the block device. Once the relocation is done, I can run dd if=/dev/sdb of=/dev/null bs=1M count=256 to get the beginning of the block device fetched to the kernel in-memory cache without seeking, and then the stat(2) operations would be fast, because they read from the cache. Is there a way to lock those inodes and/or blocks into memory once they have been read? Which filesystem has such a defragmentation tool?

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Software :: Moving Root Filesystem To Another Disk

May 19, 2009

I've setup a filesystem on a RAID 0+1 and am looking at moving root filesystem from a single disk to the new one. I could not install CentOS on mirrored filesystem as the RAID card did not have a pre-built driver for CentOS 5.3, so I had to compile the driver after installing the system.What I'm going to do now is:

1. Mount the new mirrored filesystem under /root1
2. use find | cpio to copy everything from the existing / to /root1
3. use grub to create a boot record on /root1
4. edit /root1/etc/fstab to point / to the new disk
5. reboot the system and keep my fingers crossed

Is this the way to go? Am I missing anything?

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CentOS 5 :: Moving Root Filesystem To Another Disk?

May 19, 2009

Ive setup a filesystem on a RAID 0+1 and am looking at moving root filesystem from a single disk to the new one. I could not install CentOS on mirrored filesystem as the RAID card did not have a pre-built driver for CentOS 5.3, so I had to compile the driver after installing the system.

What Im going to do now is:

1.Mount the new mirrored filesystem under /root1
2.use find | cpio to copy everything from the existing / to /root1
3.use grub to create a boot record on /root1
4.edit /root1/etc/fstab to point / to the new disk
5. reboot the system and keep my fingers crossed

Is this the way to go? Am I missing anything?

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General :: Filesystem For SSD Disk: BTRFS Vs NILFS2 Vs EXT4?

Jul 11, 2010

I've just bought a new SSD hard drive:Kingston SSDNow V-Series SNV125-S2/128GB 2.5'' 128GB SATA/300The question is which filesystem whould you recommand and why?BTRFS vs NILFS2 or EXT4?If you choose ext4 would you enable jurnalling?I'm very close to choose Btrfs.Any experience with running any of these on your SSD?

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General :: Best Filesystem Choices For NFS Storing VMware Disk Images?

May 17, 2010

Currently we use an iSCSI SAN as storage for several VMware ESXi servers. I am investigating the use of an NFS target on a Linux server for additional virtual machines. I am also open to the idea of using an alternative operating system (like OpenSolaris) if it will provide significant advantages.What Linux-based filesystem favours very large contiguous files (like VMware's disk images)? Alternatively, how have people found ZFS on OpenSolaris for this kind of workload?

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General :: Ubuntu - Install On Flash Disk With NTFS Filesystem?

Feb 2, 2011

I would like to install linux (ubuntu) on a Flash disk with NTFS partition and boot from flash disk, is it possible? Yf yes how could i install ?

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CentOS 5 Hardware :: Magneto Optical Disk Written Under OS/2 Hpfs Filesystem?

Nov 22, 2010

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?

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Red Hat / Fedora :: Use Filezilla In A Newly Installed F14?

May 20, 2011

when iam trying to use filezilla in a newly installed fedora 14,it shows a time out error. (when trying to connect to a server) my pxoxy properly working&i get internet connections, in my filewall ftp port is enabled. so what may be the issue now?

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Ubuntu Installation :: Increasing Size Of Hard Disk Space Allocated For Filesystem?

Jan 4, 2010

I recently installed Bio-Linux 5.0 as a dual boot system with XP for some bioinformatics applications, but Im having some problems with the amount of disk space which can be allocated specifically for the Ubuntu install.

I partitioned a 250 GB portable hard drive into:

/dev/sdb1: 154.76 GiB (with 30 GiB allocated for Ubuntu)
/dev/sdb2 : 78.13 GiB

Ive been using blastclust to analyse some very large data sets, which keeps on crashing due to filesystem running out of disk space.

When I installed Bio-Linux 5.0 from the live cd, the maximum size I could allocate to the install was 30 GiB, and I havent been able to find a way to change this.

Ive tried using System->Administration->Partition Editor using the live cd, and can view / delete the partitions, but I cant find a way to specifically alter the disk space allocation for Ubuntu.

How do I increase the filesystem size to larger than the current 30 GiB?

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