I am doing some benchmarking on EXT4 performance on Compact Flash media. I have created an ext4 fs with block size of 65536. however I cannot mount it on ubuntu-10.10-netbook-i386. (it is already mounting ext4 fs with 4096 bytes of block sizes) According to my readings on ext4 it should allow such big block sized fs. I want to hear your comments.
[Code]...
I have reformatted my hard drive with allocation size 64K(formatted on windows with 64k setting) for a better performance on my WDTV HD media player(dealing with large files).When I mount this drive on Linux, the properties tells me that"blksize=4096".If I keep writing files using this default setting(blksize=4096) to my NTFS formatted hard drive, will my WDTV be able to benefit from the performance improvement of 64k allocation size ?I am confused, Does it have anything to do with "blksize=4096". ?Should I try and mount my hard drive with a larger blksize ?I did some research on google but couldn't find an option to increase the blksize when mounting an NTFS pre-formatted drive
View 1 Replies View RelatedI have one hard disk (call her HDA) that contains nothing but a single ext4 partition containing a backup of all my important data. Last night I did a clean install of Ubuntu 10.10 on my primary hard disk (call her HDB) and from there proceeded to upgrade directly to Ubuntu 11.04 upgrade. In 10.10, I was able to read HDA just fine. However after the upgrade, I can no longer mount this drive. When mounting from file browser:
Code:
Error mounting: mount: wrong fs type, bad option, bad superblock on /dev/sda,missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so The end of dmesg said the following:
Code:
dmesg | tail
[ 82.130904] EXT4-fs (sda): bad geometry: block count 122096646 exceeds size of device (122096381 blocks)
my hard disk has a block count greater than the size of my device. I've done my background searching on this and tried a command line utility I've never heard of before:
Code:
# sudo e2fsck /dev/sda
e2fsck 1.41.14 (22-Dec-2010)
The filesystem size (according to the superblock) is 122096646 blocks
The physical size of the device is 122096381 blocks
[code]....
this is as far as I've gotten. This drive holds over a decade's worth of work for me and is extremely valuable. I really didn't think that the Ubuntu upgrade process would mess with this drive, seeing as the Ubuntu install was contained on an entirely different drive. What is it that I need to do to restore my drive to working status?
We are currently running Redhat 5.4 64Bit (Build 2.6.18-164.e15) however having issues with tar files that are greater than 2TB in size.
We have been told that upgrading the kernel to support the ext4 file system (supported in version 5.5?) and mounting the current 10TB nas share as an ext 4 file system may solve our over 2TB file size issues. Are their limitations within the ext3 file system that cause issues to files greater than 2TB and if this is the case Do we have to update the kernel (complete rebuild), or can we load a package on the redhat box to support the ext 4 file system Where do we get the upgrade/package. I have logged onto the redhat site and can not find kernel updates but can find the full installation packages. We are not connected directly to the internet and do not have access to the update repository
I'm trying trying to understand dd, and I'd like to know why frequently do we have to use a block read/write size, like "dd bs=1024", "dd ibs=512"... If it executes the operation byte by byte, isn't it irrelevant? What is this block size then?
View 6 Replies View RelatedI use dd in its simplest form to clone a hard drive dd if=INPUT of=OUTPUT However, I read in the manpage that dd knows a blocksize parameter. I was wondering whether there is an optimal value for the blocksize parameter that will speed up the cloning procedure?
View 4 Replies View Relatedwhat block size means in plain English? I know block size 4k has 2 TB of file size limit and 1024 has around 17 GB. How do they calculate this?
View 3 Replies View RelatedI want to generate a temporary random list from a directory of files and then determine the size of an arbitrary block of files from this list (say 1-25 or 26-50) and add their names to a file along with some other info for each name. I can generate a random list with file sizes like this: ls -l | sort -R | cut -d " " -f 6 but i'm not sure how to add up the sizes of just a certain block of these files and at the same time save the file names.
View 2 Replies View RelatedI'm running a small development server on Ubuntu 10.04 server 64 bit with ext4 as the File system type.
I keep on getting wrong block / inode size when I do an fsck:
Code:
I then force an fsck and the problem is solved, but given a day or two, the problem is back. This can sometime consume up to 10G of my HDD space.
Code:
I have dual boot: Ubuntu 10.04 and Opensuse 11.2.Howto mount Read Only ext4 partition from Opensuse in /etc/fstab under Ubuntu?
View 3 Replies View RelatedWhen I boot up for Ubuntu 9.10, I get a screen that gives me a selection of what I assume are versions of Ubuntu 9.10.I get: Kernal Panic: not syncing: VFS: Unable to mount root fs on unknown-block(8,3) and the process stops. I have to turn off the computer and go back and select "2.6.31-15 generic"What is going on and what do I need to do to get back to 17 generic version?
View 5 Replies View RelatedI have a wind river linux installed on a IDE disk, whenever i boot it, it says:
The menu.lst file looks like this:
I want to install new kernel of wind river linux, i tried to mount usb disk but it is not working.
I am new to Fedora, and I noticed when I opened my home folder that I only had 54GB. My HD is 120, and when I used the disk utility, I noticed that 64GB are in ext4! What?! This was not a problem in Ubuntu, so why has it happened now? Is there anyway I can decrease the size of ext4 and give some of it to Fedora?
View 4 Replies View RelatedI'm having a problem with GParted. I'm trying to increase the size of an ext4 partition but the maximum is set to 9970 MiB. The option to increase its size is greyed out. How can I fix this?
View 7 Replies View RelatedI have a 7GB unallocated space and I want to expand/increase the size of the preinstalled fedora 13 ext4 size from the unallocated space any ideas?**Using gparted live is not working is just displating the whole sda drive.
View 4 Replies View RelatedI downloaded the ubuntu-9.10-desktop-i386.iso file from the website, extracted it, and ran the Wbiu.exe file - it prompted to get my info and then restart. Upon restarting, I then had the choice to run Windows or Ubuntu, and I've been running Ubuntu ever since.
I ran into some speed-bumps. Upon entering the Ubuntu option at my start-up prompt, I go to another prompt asking me to choose from: Ubuntu, linux 2.6.31-20 Generic Ubuntu, linux 2.6.31.20 Recovery mode Ubuntu, linux 2.6.31-14 Generic Ubuntu, linux 2.6.31-14 Recovery mode Windows 7 installer Windows Vista installer
I've been choosing the very first one, the 31-20 generic, but just this morning after downloading some programs from the Synaptic and transferring a few Gbs of music, I received this error prompt: Code: [2.879604] Kernel panic -- not syncing: VFS : Unable to mount roof fs on unknown--block (8,2) After that, I've been running the 2.6.31-14 generic installer. I have no idea what any of this means and I've spent time crawling through threads trying to figure it out. I mean, it still WORKS but I just help but think I've done something very wrong. ALERT: SUDO PASSWORD QUESTION
I hope the cautionary sign above has dispelled any annoyed gurus who have answered this question dozens of times before. I've crawled through my fair share of threads concerning this, the best corollary being the following: forum/linux-newbie/157773-solved-sudo-password-errors-usb-internet-issues.html; which, strangely enough, was never really solved. Like the user in that thread, when I access the terminal and type in a command, the next line invariably states "[sudo] password for jacob' -- when I hit enter and type in the long list of possibilities I've read (read: sudo, su, su root, su passwd, sudo passwd, sudo root, et al.), alas, nothing happens but the same statement.
i am just learning about computers and know nothing at all except how to turn it on. i just booted up linux and recieved message: [0800654] Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown - block (8,1)
View 5 Replies View RelatedI have done it quite often. Inserted and run the computer from a live CD so that the hard drive is not mounted an changed the partitions. It worked on the old reiserfs when I wiped the windows partition on my laptop to increase the space, it worked on ext3 partitions. Now I resized the swap partition and reduced the NTFS partition on my desktop - no problem. But it does not increase the ext4 partition. No error message it just does not do it. I tried several times with the suggested maximal setting, with a custom setting, etc. It just does not change size. Just for interest I booted into Suse11.0 live CD and tried from there. There I get the answer cannot resize partition as the file system does not allow resizing. Is something wrong with the system or does the partitioner not work with ext4?
View 7 Replies View RelatedMis-allocated 10g instead of 30g to /var/lib/mysql and realized mistake After Fresh Install and upgraded all servers. Using Slackware13.1, Xfce did some googling wondering if its possible to resize the above partition with fdisk. Read some things about gparted and wonder if it will work using Xfce.. i've never use kde or gnome. There is also mention of using live cd; I have no experience with any of the mentioned tools; just fdisk to partition and install. What is the best or simplest way to backup & restore; (I do have an empty sdb 160g but don't want to get into complicated raid or LVM setups right now because I still have to learn howto backup & restore do data to the point where I feel comfortable with it)?
Current setup: sda 160gb Hdd used 73.5 for following partitions: sda1 512m /boot; sda2 Extended Rest of Hdd; sda5 1280m /swap; sda6 8g /home; sda7 2g /; sda8 8g /usr; sda9 8g /usr/local; sda10 10g /var; sda11 10g /var/log; *sda12 10g instead of 30g /var/lib/mysql; sda13 10g /opt; sda14 5g /tmp Haven't configure mysql... so /dev/sda12 is empty except for system disk data the same goes for /dev/sda13 /opt & /dev/sda14 /tmp
In a book, I read tha cmchk command is used to get the disk block size. But in Ubuntu, it is not allowed as command is not available.Can some body tell me what is its equivalent in Ubuntu.
View 4 Replies View RelatedDoes anyone have a guide/instructions to change the Block Size on a Linux disk from 4096 bytes to 1mb or more?
View 2 Replies View RelatedI have attempted to install kernel 2.6.34 and 2.6.33 kernels with this Debian howto [url] Everything worked without any errors until I went to boot into the new kernel. When I receive this kernel panic output Kernel panic - not syncing VFS: unable to mount root fs on unknown-block(0,0)
It also spits out something about being unable to access ext2 FS. I googled this symptom and have seen that it is fairly common, but everyone's error seems somewhat unrelated. I used the same kernel configuration as the one that is currently working, to keep things simple.
And here is what my menu.list looks like:
i'm calculating the size of directories using "du"
PHP: function du($path)
{
exec ('du -sb ' . $path, $res[]);
$size = $res[0][0];
[Code].....
But then again, it doesn't calculate the actual file size, but rather a size aligned to 1024 bytes just as Windows does that with 4096 bytes cluster size. Is there a way to calculate the actual file size? eg. 1021 bytes
How do you go about getting the raw size of a block device under Linux from within a C program? And I mean the raw size of the block device itself, not a file system that may or may not be installed on it. And I'd like to be able to get the raw size of any block device, from hard drives (e.g., /dev/sda) to LVM partitions (/dev/mapper/vg0-home) to loop devices to anything else that is a Linux block device.
View 3 Replies View RelatedI have nearly 200GB of space free on the HD with my linux main EXT4 partition, and I'm wondering if I can convert a large part of this to a new NTFS partition that I can use for my windows XP paralell install?
Basically, what do I have to do to resize and create the new partition and how do I get windows to recognize it?
I am running CentOS 5.5 with a 14T ext4 volume. We are sharing out a few sub-directories via NFS. Our customer was doing some penetration testing with our web app that writes to one of those NFS shares. We are not sure if they did something to cause the metadata to grow so large or if it is corrupt. Here is the listing:drwxrwxr-x 1 owner owner 470M Jun 24 18:15 temp.badI guess the metadata could actually be that large, however we have been unable to perform any operations on that directory to determine if the directory is just loaded with files or corrupted. We have not run an fsck on the volume because we would need to schedule downtime for out customers to do so. Has anyone come across this before
View 2 Replies View RelatedI have reformatted my hard drive with allocation size 64K for a better performance on my WDTV HD media player(dealing with large files). When I mount this drive on Linux, the mount tells me that "blksize=4096".If I keep writing files usinghis default etting(blksize=4096) to my NTFS formatted hard drive, will my WDTV be able to benefit from the performance improvement of 64k allocation size ? Should I try and mount my hard drive with a larger blksize ?I did some research on google but couldn't find an option to increase the blksize when mounting an NTFS pre-formatted drive.
View 1 Replies View RelatedHere [URL].. it says that you need to provide a block size to open an archive. What does that mean, and what would be a good number to use?
View 1 Replies View RelatedIs it possible to mount ext4 fedroa filesystem from Debian? Debian kernel 2.6.31
View 6 Replies View RelatedI have 250Gb, 500Gb and 1Tb drives concatenated together as one volume group (span) with a logical volume (spanvol). Under kernel 2.6.31.5-127.fc12.x86_64 it mounts totally fine. However, under 2.6.31.6-145.fc12.x86_64, I get this:-
[root@undertaker ~]# mount -t ext4 /dev/mapper/span-spanvol /home
mount: wrong fs type, bad option, bad superblock on /dev/mapper/span-spanvol,
missing codepage or helper program, or other error
[code]....