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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Hardware :: Mount Magneto Optical Disk OS2 / SCSI

Nov 20, 2010

I am trying to mount a a Magneto Optical WORM drive, mechanically it is a 2.6 Gb, 1024 Bytes/Sector, 5.25", Verbatim Media, The disk was created under OS-2.

I am using CentOS 5, and have tried mounting the disk as msdos and as vfat and get superblock errors among others.

what filesystem type did OS-2 use? is there an add on to CentOS that will support the filesystem?

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Ubuntu :: Add A New Hpfs Disk With Utf16 Encoding Files System?

Aug 2, 2011

How is it possible to add a new hpfs disk with utf16 encoding files system? I would like to add my windows 7 device at the boot beginning automaticly? I could mount in gnome with nautilus with a one mouse click.

# /etc/fstab: static file system information.
# Use 'blkid -o value -s UUID' to print the universally unique identifier
# for a device; this may be used with UUID= as a more robust way to name


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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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Fedora :: Cannot Author Optical Disk In F13 KDE

Jun 24, 2010

I generally use Nero Linux for my optical disk authorization needs. But after installing Fedora I've noticed that Nero is not writing data in disks. It tried to make an .nrg image of the data in my hard disk. Then I tried k3b but seeing this error message:

MP3 Audio Decoder plugin not found.
K3b could not load or find the MP3 decoder plugin. This means that you will not be able to create Audio CDs from MP3 files. Many Linux distributions do not include MP3 support for legal reasons.

Solution: To enable MP3 support, please install the MAD MP3 decoding library as well as the K3b MAD MP3 decoder plugin (the latter may already be installed but not functional due to the missing libmad). Some distributions allow installation of MP3 support via an online update tool. Installed libmad without success........

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Hardware :: How To Get Information About Optical Disk

Jul 21, 2010

I need information about the capabilities and state of the disk...specifically, if it's rewritable (capability) and if it's currently blank (state). Currently, I'm using the output of hal-device to give me that information. The problem is, hald doesn't update the information in response to a burn event... this is a problem, because if a burn a blank disc, hal-device still lists it as blank...and if I blank a disk, hal still lists it as non-blank.

Is there a method to force HAL to update a device, or is there a way to query the disk/drive directly to find out if the disk is blank and rewritable? Or even a method to determine if a disk is blank or not? Additionally, this is for a CD-burning application... so I'm intentionally trying to avoid anything hacky like ejecting the CD and reinserting it... anything of that nature.

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General :: Data Written To Unformatted Disk

Jan 14, 2011

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

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Installation :: Select A New Partition Size, Any Previous Changes Have To Be Written To Disk?

Mar 26, 2009

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"

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.

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Slackware :: No Optical Drive Found - K3b Did Not Find Any Optical Device In Your System

May 22, 2010

I dont know when k3b stopped working but have just gone to burn a disk and when opening it tells me

Quote: No optical drive found. K3b did not find any optical device in your system. Solution: Make sure HAL daemon is running, it is used by K3b for finding devices.

I can boot from cd and can mount cds from within Slackware but for some reason k3b insists that i don't have a drive.

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Ubuntu :: External Optical Drive Icon Disappears When Inserting Disk?

Jan 31, 2011

I have an external CD/DVD usb drive and as soon as I insert a disk (I've tried both CD and DVD), the drive icon disappears (unmounts?).I thought it was a bus power issue because it is a mini laptop (Asus Eee PC). This small/slim external drive has two USB cables, one for power and one for power/data. So, I plugged the power cable into my nearby Windows desktop computer and just the power/data into the Ubuntu PC.

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Ubuntu Multimedia :: Optical Out From TV Into The SPDIF / Optical In On PC

Jul 5, 2010

I currently have the following:-

Optical Out from my TV into the SPDIF / Optical In on my PC
Optical Out from my PC into my Sony 5.1 Theatre Kit

The audio from the PC comes through ok when listening to music and movies. But unfortunately I can figure out how to enable the audio passthrough from my Tv so that the audio comes out of my theatre kit. In Sound Preferences, the hardware is set to 1 Output / 1 Input [Digital Stereo (IEC95 Output + Digital Stereo (IEC95 Input]. When I click on the audio tab, the Input Volume is at 100% and the Input Level is moving in conjunction with the audio coming from the Tv.

I saw it mentioned in another thread to install Gnome Alsa Mixer which I've done, it seeems to identify the audio chipset as Realtek ALC882, the motherboard is an Abit AB9 Pro. Hopefully I'm missing some config somewhere or there a box I should be ticking but I just can't find it.

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CentOS 5 Hardware :: Optical Drive Seen In BIOS But Not In 5.2?

May 21, 2009

Hardware is a Supermicro with C2SBC-Q board, have set up a RAID1 with 3 WD drives, the BIOS "sees" the "LightScribe" DVD drive but it is not being recognized by CentOS (5.2 x86_64). It's on an IDE bus, set to "master".# dmesg | grep -E 'CD|DVD|hdc' produces a new prompt with NO feedback, BTW.I have CentOS 5.2 i386 running on this machine with the same DVD drive, it was not an issue.

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CentOS 5 :: Install Using An USB Key Than Optical Media Drive?

Aug 1, 2010

1- If I have a motherboard that supports USB boot (a Supermicro one), how can I put the CentOS DVD .iso that I just downloaded onto the stick to have the computer boot from it?

2- Certain Supermicro boards support IPMI (Kvm over LAN) and Serial over LAN and most notably Virtual Media Over Lan. I am wondering if there would be any problem installing CentOS using the Virtual Media over Lan.

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CentOS 5 Hardware :: Audio Via Optical S/PDIF Output On On-board RealTek ALC885 HDA?

Mar 29, 2010

I can not get any output from the digital optical S/PDIF jack on my on-board audio device. But I am getting an analog signal from the headphone jack. I don't have an RCA S/PDIF cable, so I haven't tested the RCA S/PDIF jack. Below are my system specs and hardware info.

According to my MOBO (DFI Blood-Iron P45) manual, the Audio device is:
Realtek ALC885 HDA CODEC
8-channel audio output
Optical S/PDIF-out and coaxial RCA S/PDIF interfaces

There are 6 phone jacks (including 1 mic), an RCA S/PDIF, and an Optical S/PDIF jack on the MOBO. The output of alsa-info.sh is here:[URL]... Note that I tried several model options (6stack-dig, 6stack-dig-demo, intel-alc889a, auto) for the snd-hda-intel module, but none worked,

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Ubuntu :: HPFS/NTFS Won't Mount

Oct 20, 2010

Recently installed ubuntu 10.10 and rather like it but been trying to setup and configure everything so its a feasible alternate OS.

I have a problem where one of my hard drives doesnt show up in places.

The drive works fine in windows.

The information provided to me by Disk Utility says:

Model: ATA WDC WD 10EADS-00L5B1
Partitioning: Master Boot Record
Device: /dev/sdb
Partition Type: HPFS/NTFS (0x07)

Now i have a total of 4 drives, windows 7 on one, linux on one, and 2 storage. Linux recognizes my main windows drive and my 2 TB storage drive, but not this one for some reason. I assume it has to do with the partition type? Disk utility just shows its parition bar image as 'unknown' so yeah. Now there is one error during boot related to this but i can't read it fast enough to remember it all, all i see is the sdb label real quick.

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General :: GRUB Will Not Recognize OS/2 HPFS

Jul 8, 2011

I have a nice spare K6 machine with a 66G drive and OS/2 Warp 4 installed on the primary partition, which is all of 2G, formatted in HPFS. Like DOS, OS/2 can only be on the primary partition. I have set up and formatted 3 additional partitions as ext2 or ext3 using qParted. GRUB is a great bootloader, but does not seem to recognize the primary partition at all, making multiboot difficult. Is there a way of getting GRUB to recognize the HPFS?

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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 :: Unable To Format Brand New HPFS/NTFS Drive?

Feb 14, 2011

I'm unable to format a new drive. I've tried commands, which complete without error, yet the drive is still listed as NTFS.

===========Ive tried the following
[root@server ~]# mke2fs -j -m1 /dev/sdb1
mke2fs 1.39 (29-May-2006)
Filesystem label=
OS type: Linux


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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
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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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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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 :: 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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CentOS 5 Server :: Can't Mount Ext4 Filesystem In Centos 5.6?

Sep 7, 2011

Summary of issue: EXT4 filesystem won't mount--with error = mount: unknown filesystem type 'ext4'. Is no ext4 in kernel the issue? Or is something corrupted?Really perplexed by this. I updated Centos 5.5 to 5.6 to get ext4 (5.6 is supposed to have full support of ext4). I built several arrays and put the ext4 filesystem on them. All went well until I tried to mount them. BTW, this array (below) is set up as a RAID6 using partition 1 of #8 2TB drives.Bear with me here; just trying to be complete and not waste your time.

Attempting to mount give this:[root]# mount -v /dev/md1 /asc/array1mount: unknown filesystem type 'ext4'Note: it does "fake" mount with ption (which apparently does everything except the system call):[root]# mount -f -v /dev/md1/dev/md1 on /asc/array1 type ext4 (rw,grpquota,usrquote)e2fsprogs:Package e2fsprogs-1.39-23.el5_5.1.x86_64 already installed and latest version (for Centos 5.6; CentOS 6x uses the 1.41...)

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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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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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Hardware :: Permanent Filesystem Corruption On Reiserfs - Ext3 And Ext4 - Disk Failure?

Feb 9, 2010

I have been having problems with filesystem corruption on my eeepc 1000H for a long time now. I have tried using different filesystems, kernels and distributions (arch, slackware) to no effect. I am starting to grow suspicious that this problem lies somewhere else, as I haven't seen anyone else having similar problems in such a variety of scenarios.

I have tried testing my ram using memtest86+, didn't come up with anything after a full run through. I also have tried using e2fsck -c to check for bad blocks, it finds none. I had a go at using smartctl but wasn't really sure what I was doing. I did a long test and it came up with nothing anyway.

This problem is in addition to the problems I've been having with my intel graphics chip and KMS. A lot of the time there are lockups when booting into X, which can only be gotten out of by a hard reset. This is sometimes what causes the original filesystem errors. I've stopped messing around with KMS for now to eliminate this but my current system in unbootable. I'm guessing my disk is wrecked but have as yet seen no definitive proof. Can anyone recommend anything that I should do?

I am currently on ext4 with a custom kernel 2.6.33-rc6 (the stock kernel shipping with slackware does not have the elantech extension for psmouse included). When I was using arch, I was just using the stock kernels.

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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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CentOS 5 :: Redistribute A Disk Without Loss Of Data Namely It Is Necessary To Make / Boot And Two Equivalent On Disk Volume?

Aug 24, 2009

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.

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